State of Iowa v. Keyon Harrison ( 2018 )


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  •               IN THE SUPREME COURT OF IOWA
    No. 16–1998
    Filed June 22, 2018
    STATE OF IOWA,
    Appellee,
    vs.
    KEYON HARRISON,
    Appellant.
    Appeal from the Iowa District Court for Polk County, Paul Scott,
    Judge.
    A juvenile offender appeals his conviction for first-degree felony
    murder and challenges his sentence of life imprisonment with the
    possibility of immediate parole as cruel and unusual punishment under
    the Iowa and United States Constitutions. AFFIRMED.
    Matthew G. Sease of Kemp & Sease, Des Moines, for appellant.
    Thomas J. Miller, Attorney General, Louis S. Sloven, Assistant
    Attorney General, John P. Sarcone, County Attorney, and Jeffrey K. Noble
    and Shannon Archer, Assistant County Attorneys, for appellee.
    Brent Michael Pattison of Drake Legal Clinic, Des Moines, and
    Marsha L. Levick, of Juvenile Law Center, Philadelphia, Pennsylvania, for
    amici curiae Juvenile Law Center, Center on Wrongful Convictions of
    Youth, and the Center for Law, Brain and Behavior.
    2
    ZAGER, Justice.
    Keyon Harrison appeals his conviction for first-degree murder.
    Harrison argues applying the felony-murder rule to juvenile offenders
    based upon a theory of aiding and abetting violates the Iowa and United
    States Constitutions. Harrison also presents as-applied and categorical
    constitutional challenges to his sentence claiming a sentence of life with
    the possibility of parole for a juvenile offender who was convicted of felony
    murder constitutes cruel and unusual punishment under the Iowa and
    United States Constitutions. Further, Harrison maintains the trial court
    failed to provide the jury with proper instructions regarding the types of
    assault required to establish the forcible felony robbery element of felony
    murder.    Finally, Harrison presents ineffective-assistance-of-counsel
    claims alleging he was prejudiced by the errors of his trial counsel,
    including trial counsel’s failure to request certain jury instructions and
    failure to object to certain evidence presented at trial. For the reasons set
    forth below, we affirm the conviction and sentence.
    I. Background Facts and Proceedings.
    On November 7, 2014, starting at approximately 3:45 p.m., Aaron
    McHenry began receiving calls and text messages from Keith Collins who
    was looking to buy marijuana from McHenry.         Collins, then seventeen
    years old, and Keyon Harrison, then sixteen years old, were at an Oasis
    store at the time, and they initially wanted to meet McHenry at the Oasis
    store. However, McHenry did not know where the Oasis store was located.
    Therefore, McHenry arranged for them to meet at the Family Dollar store
    near the 2600 block of Hickman Lane around 4:20 p.m. The purpose of
    the meeting was to complete the sale of marijuana from McHenry to Collins
    and Harrison.
    3
    At 4:23 p.m., Shirley Dick was taking her dogs outside when she
    saw a black male, later identified as Collins, walking near her home at
    2600 Hickman Lane. Dick approached Collins to see if there was anything
    she could help him with, and Collins told her that he was waiting for his
    girlfriend. Dick told Collins there were no kids that lived on her street,
    and Collins turned away without responding to her.                     Thereafter, Dick
    noticed Jorge Gutierrez, a nearby neighbor, chasing his dog as it ran from
    his house in the direction of Dick’s house. Dick waited outside, offering to
    help Gutierrez retrieve his dog.
    While Gutierrez was retrieving his dog and returning home, he
    observed Collins sitting on a retaining wall on Hickman Lane. Gutierrez
    also saw McHenry and Harrison walking from 26th Street in the direction
    of Hickman Lane. Gutierrez saw McHenry and Harrison begin to walk
    faster, and they eventually “started to, like, push each other.”
    Nevertheless, Gutierrez went back inside, and Shirley Dick turned to walk
    back towards her home.
    As she turned around, Dick heard gunshots, and she saw Collins
    take off running underneath nearby bushes. Dick testified that Collins
    was “maybe five feet” from McHenry when she turned around, but she did
    not see Harrison or anyone else in the area. 1                 Dick then called 911.
    Gutierrez also heard the gunshots and turned around to see McHenry lying
    on the ground. Gutierrez saw Collins and Harrison start running together
    “away from Hickman Road.”
    1Shirley  Dick testified about the events she witnessed surrounding McHenry’s
    death at Collins’s trial, but she passed away before she was able to testify at Harrison’s
    trial. The parties agreed to read her testimony into the record at Harrison’s trial, and her
    testimony was admitted to the court as an exhibit. The parties also agreed to have Dick’s
    911 call reporting the gunshots played at trial.
    4
    Several other neighbors told police they saw two black males
    running away from the area, and two nearby homeowners provided police
    with security camera footage from their homes showing a black male
    running away from the area. Camera footage at Broadlawns Hospital,
    taken shortly after the shooting, shows Collins and Harrison together at
    the hospital where Collins was treated for an injury to his right hand.
    Harrison and Collins then went to meet up with Harrison’s girlfriend at
    her residence. The girlfriend testified that when she joined them, she saw
    Harrison “was holding two bags of marijuana in his hands, like baseball
    size”. Thereafter, the group went to a store to buy blunt wraps for smoking
    marijuana, and Harrison and Collins smoked some of the marijuana when
    they returned to the girlfriend’s house. Harrison and Collins then returned
    to Collins’s apartment around 8:00 p.m.
    When police responded to the 911 call about a shooting at Hickman
    Lane, they discovered Aaron McHenry’s dead body. McHenry had multiple
    gunshot wounds to the head, torso, upper back, and arm, including a
    couple of wounds that contained signs indicating he was shot from close
    range. Police were able to identify Collins as a suspect soon after the
    shooting. Police contacted the Hoover High School resource officer after
    another Hickman Lane neighbor told them that one of the individuals went
    to Hoover High School with her. She also told police that people at the
    school thought he resembled the rapper Bobby Shmurda. The resource
    officer identified two individuals who fit that description. Later, the police
    provided the neighbor with two separate photo arrays. The neighbor was
    able to positively identify Collins as one of the individuals running from
    the area of the shooting. Police subsequently obtained a search warrant
    for Collins’s apartment, which they executed about twelve hours after
    responding to the scene of the shooting.
    5
    Harrison was with Collins at the apartment when the police
    executed the search warrant. Collins had marijuana in his backpack, and
    Harrison had marijuana on his person.          Both packages of marijuana
    confiscated from Collins and Harrison were identical in amount and
    packaging.   Police recovered the cell phone used to communicate with
    McHenry, but they did not recover a gun during the search. The police
    then took Harrison into custody.          After Harrison’s mother arrived,
    Detective Youngblut provided Harrison and his mother with his Miranda
    rights, and they agreed to sign a written waiver of his Miranda rights.
    Youngblut conducted Harrison’s questioning and recorded the
    entire interview and events surrounding the interview at the police station.
    The recording equipment was visible, and there was a sign outside of the
    interview room informing people that the room was audio and video
    recorded. Harrison’s mother was aware of the recording. While police were
    not in the room, she informed Harrison that the room was being recorded.
    During the interview, Harrison was repeatedly dishonest with Youngblut.
    Harrison told Youngblut that Collins did not have a cell phone. Harrison
    told Youngblut that he was not with Collins around the time of the murder
    because he was somewhere else and that he went to Broadlawns Hospital
    with his girlfriend from his girlfriend’s house to meet up with Collins.
    When Youngblut left the room, Harrison’s mother accused Harrison
    of lying and told Harrison, “I can’t help you if you lyin’ to me.” In response,
    Harrison stated,
    Alright mama. Look, look. We was walking, [Collins]’s like, “I
    got a lick.” I’m like, “Bro, no, bro, you’re not going to do it.”
    He’s like, “Bro, I’ve got a lick. I need it. I need to go to
    Chicago.” He’s like—because he’s trying to go to Chicago or
    whatever with his mom. He’s like, “Bro, I need it.” So I’m like,
    “Bro, you can hit that lick but bro, I’m just going to stay on
    the side.” So we walking down, we walking down the street
    and then he was . . . .
    6
    Harrison’s mother then interjected to remind Harrison that they were
    being recorded before Harrison could finish the rest of the sentence. A
    “lick” is slang for a robbery, and the cell phone the police recovered from
    Collins listed McHenry’s phone number under the name “Lick.”
    Investigators found marijuana residue in McHenry's pants pocket but no
    marijuana, which they believed indicated someone had stolen marijuana
    from him.
    The State charged both Harrison and Collins with first-degree
    murder. They were tried separately. The State initially charged Harrison
    with first-degree murder in violation of Iowa Code sections 707.1 and
    707.2 and first-degree robbery in violation of Iowa Code sections 711.1
    and 711.2 (2015). Harrison’s trial began on October 3, 2016. On October
    4, before the presentation of any evidence, the State filed an amended trial
    information that dropped the charge of first-degree robbery.
    The State conceded during trial that “the evidence tends to suggest
    that it was probably [Harrison’s] friend and companion Keith Collins” who
    shot McHenry, and it dismissed the charge of premeditated murder in the
    first-degree under Iowa Code section 707.2(1)(a). At trial, the State only
    presented the theory of first-degree murder based upon the felony-murder
    rule under Iowa Code section 707.2(1)(b). The State argued Harrison was
    guilty of aiding and abetting in the robbery and murder of McHenry. At
    the conclusion of the trial, the jury returned a unanimous verdict finding
    Harrison guilty of first-degree murder in violation of Iowa Code sections
    707.1 and 707.2(1)(b) for killing McHenry while participating in a forcible
    felony, the robbery.    Harrison was sentenced to life in prison with
    immediate parole eligibility.   Harrison filed a timely appeal, which we
    retained.
    7
    II. Standard of Review.
    We review alleged violations of state or federal constitutional rights
    de novo. State v. Coleman, 
    907 N.W.2d 124
    , 134 (Iowa 2018). In doing so,
    we evaluate each case “in light of its unique circumstances” by examining
    the “totality of the circumstances as shown by the entire record” to “make
    an independent evaluation.” State v. Krogmann, 
    804 N.W.2d 518
    , 522–23
    (Iowa 2011) (quoting State v. Brooks, 
    760 N.W.2d 197
    , 204 (Iowa 2009)).
    Further, “[w]e may review a challenge that a sentence is illegal at any time.”
    State v. Zarate, 
    908 N.W.2d 831
    , 840 (Iowa 2018). Though we typically
    review challenges to illegal sentences for correction of legal errors, our
    standard of review for an allegation of an unconstitutional sentence is de
    novo. 
    Id. Our standard
    of review for challenges to jury instructions is for
    correction of errors at law. Alcala v. Marriott Int’l, Inc., 
    880 N.W.2d 699
    ,
    707 (Iowa 2016). “We do not consider an erroneous jury instruction in
    isolation, but look at the jury instructions as a whole.” State v. Murray,
    
    796 N.W.2d 907
    , 908 (Iowa 2011). Our standard of review for claims of
    ineffective assistance of counsel is de novo. State v. Schlitter, 
    881 N.W.2d 380
    , 388 (Iowa 2016). “Ineffective-assistance-of-counsel claims require a
    showing by a preponderance of the evidence both that counsel failed an
    essential duty and that the failure resulted in prejudice.” 
    Id. III. Analysis.
    Harrison presents a number of claims on appeal.               First, he
    maintains the felony-murder rule violates the Due Process Clause of both
    the Iowa and United States Constitutions when it is applied to juvenile
    offenders pursuant to a theory of aiding and abetting. Second, Harrison
    argues a sentence of life with the possibility of immediate parole eligibility
    for a juvenile offender convicted of first-degree murder under the felony-
    8
    murder rule is unconstitutional both as applied to him and on its face
    under the Cruel and Unusual Punishment Clauses of the Iowa and United
    States Constitutions. Third, Harrison claims the trial court did not provide
    proper jury instructions on the specific types of assault necessary to
    establish a felonious robbery.       Finally, Harrison advances ineffective-
    assistance-of-counsel claims alleging his trial counsel breached essential
    duties that resulted in prejudice by failing to request certain jury
    instructions and failing to object to certain evidence presented at trial. We
    address these claims in turn.
    A. The State and Federal Juvenile Sentencing Landscape.
    Article I, section 17 of the Iowa Constitution and the Eighth Amendment
    of the United States Constitution provide Iowans convicted of a crime with
    the right to be free from cruel and unusual punishment.         U.S. Const.
    amend. VIII; Iowa Const. art. I, § 17. This fundamental constitutional
    tenet “flows from the basic ‘precept of justice that punishment for crime
    should be graduated and proportioned’ to both the offender and the
    offense.” Miller v. Alabama, 
    567 U.S. 460
    , 469, 
    132 S. Ct. 2455
    , 2463
    (2012) (quoting Roper v. Simmons, 
    543 U.S. 551
    , 560, 
    125 S. Ct. 1183
    ,
    1190 (2005)); State v. Propps, 
    897 N.W.2d 91
    , 98 (Iowa 2017). In 2005,
    the United States Supreme Court decided the first in a trilogy of cases
    interpreting the Cruel and Unusual Punishment Clause under the Eighth
    Amendment in relation to juvenile sentencing, which has transformed the
    juvenile sentencing landscape. See generally Miller, 
    567 U.S. 460
    , 
    132 S. Ct. 2455
    ; Graham v. Florida, 
    560 U.S. 48
    , 
    130 S. Ct. 2011
    (2010); Roper,
    
    543 U.S. 551
    , 
    125 S. Ct. 1183
    . An overview of these changes is necessary
    to provide background for our analysis of Harrison’s constitutional
    challenge to the felony-murder rule and his sentence of life imprisonment
    with immediate parole eligibility.
    9
    First, in Roper, the Supreme Court held that imposing capital
    punishment on juvenile offenders constitutes cruel and unusual
    punishment under the Eighth 
    Amendment. 543 U.S. at 568
    , 126 S. Ct. at
    1194. In doing so, the Court emphasized the differences between adult
    and juvenile offenders that “render suspect any conclusion that a juvenile
    falls among the worst offenders”—namely, the differences in maturity,
    sense of responsibility, vulnerability to peer pressure and negative
    influences, and the development of personality traits. 
    Id. at 569–70,
    125
    S. Ct. at 1195.    Second, in Graham, the Supreme Court held that
    sentencing juvenile offenders convicted of nonhomicide offenses to life
    imprisonment without the possibility of parole constitutes cruel and
    unusual punishment under the Eighth 
    Amendment. 560 U.S. at 74
    , 130
    S. Ct. at 2030.
    Finally,    in    Miller,    the    Supreme       Court     prohibited
    all mandatory sentences of life imprisonment without the possibility of
    parole for juvenile offenders under the Eighth 
    Amendment. 567 U.S. at 479
    , 132 S. Ct. at 2469. The Court stated, “Mandatory life without parole
    for a juvenile precludes consideration of his chronological age and its
    hallmark features—among them, immaturity, impetuosity, and failure to
    appreciate risks and consequences.”       
    Id. at 477,
    132 S. Ct. at 2468.
    Nevertheless, the Court did not prohibit all sentences of life imprisonment
    without the possibility of parole. 
    Id. at 480,
    132 S. Ct. at 2469. Instead,
    the Court held that sentencing courts must “take into account how
    children are different, and how those differences counsel against
    irrevocably sentencing them to a lifetime in prison” before issuing a
    sentence of life imprisonment without the possibility of parole to a juvenile
    offender. 
    Id. 10 Following
    Miller, the Iowa Governor commuted the sentences of all
    thirty-eight juvenile offenders serving statutorily mandated sentences of
    life without parole to sentences of life without parole eligibility for sixty
    years with no credit for earned time. See State v. Ragland, 
    836 N.W.2d 107
    , 110–11 (Iowa 2013). Shortly thereafter, we held that Miller applied
    retroactively, and the Governor’s commutations to life without parole for
    sixty years with no credit for earned time, amounted to de facto sentences
    of life without the possibility of parole and mandated the individualized
    sentencing process outlined in Miller. 
    Id. at 117,
    122. The Roper–Graham–
    Miller trilogy, and our holding in Ragland, set the course for drastic
    changes to juvenile sentencing under the Iowa Constitution.
    First, in State v. Null, we held that sentencing a juvenile offender to
    52.5 years imprisonment triggered Miller’s individualized sentencing
    requirement noting “[t]he prospect of geriatric release, if one is to be
    afforded the opportunity for release at all, does not provide a ‘meaningful
    opportunity’ to demonstrate the ‘maturity and rehabilitation’ required to
    obtain release and reenter society.” 
    836 N.W.2d 41
    , 71 (2013) (quoting
    
    Graham, 560 U.S. at 75
    , 130 S. Ct. at 2030). In State v. Pearson, we
    similarly held that the individualized sentencing requirement set forth in
    Miller applied under the Iowa Constitution to a juvenile offender’s sentence
    of consecutive terms totaling thirty-five years imprisonment without parole
    eligibility for nonhomicide offenses. 
    836 N.W.2d 88
    , 96 (Iowa 2013).
    In State v. Lyle, we held that “the sentencing of juveniles according
    to statutorily required mandatory minimums does not adequately serve
    the legitimate penological objectives in light of the child’s categorically
    diminished culpability.” 
    854 N.W.2d 378
    , 398 (Iowa 2014). As a result,
    we held that article I, section 17 of the Iowa Constitution prohibits all
    mandatory minimum prison sentences for juvenile offenders. 
    Id. at 400.
                                        11
    Additionally, we established the following necessary factors for a district
    court to consider in deciding whether a juvenile offender warrants the
    minimum period of incarceration without parole:
    (1) the age of the offender and the features of youthful
    behavior, such as “immaturity, impetuosity, and failure to
    appreciate risks and consequences”; (2) the particular “family
    and home environment” that surround the youth; (3) the
    circumstances of the particular crime and all circumstances
    relating to youth that may have played a role in the
    commission of the crime; (4) the challenges for youthful
    offenders in navigating through the criminal process; and
    (5) the possibility of rehabilitation and the capacity for
    change.
    
    Id. at 404
    n.10 (quoting Miller, 567 U.S. at 
    477, 132 S. Ct. at 2468
    ).
    In State v. Louisell, we vacated a sentence for a determinate term of
    years in prison, holding that sentencing juvenile offenders convicted of
    first-degree murder to a fixed term of years was not an option “[b]ecause
    there was no statutory authority for the determinate sentence” and “judges
    may only impose punishment authorized by the legislature within
    constitutional constraints.” 
    865 N.W.2d 590
    , 598 (Iowa 2015). We also
    rejected the defendant’s argument on ripeness grounds that she would be
    denied a meaningful opportunity for release were she to become parole
    eligible given the low rates at which the state parole board had actually
    granted parole to eligible offenders.    
    Id. at 601–02.
      Nevertheless, we
    reiterated that “juveniles convicted of crimes must be afforded a
    ‘meaningful opportunity to obtain release based on demonstrated maturity
    and   rehabilitation’—if   a   sentencing   judge,   exercising   discretion,
    determines parole should be available.” 
    Id. at 602
    (quoting 
    Graham, 560 U.S. at 75
    , 130 S. Ct. at 2030).
    Further, in State v. Seats, we expounded upon the sentencing
    factors espoused in Lyle and Miller that a sentencing court must consider
    12
    “before sentencing a juvenile to life in prison without the possibility of
    parole.” 
    865 N.W.2d 545
    , 555–57 (Iowa 2015). In applying these factors,
    we first established that “the presumption for any sentencing judge is that
    the judge should sentence juveniles to life in prison with the possibility of
    parole for murder unless the other factors require a different sentence.”
    
    Id. at 555.
    Additionally, we explained that the sentencing factors require
    sentencing courts to acknowledge the differences between children and
    adults and consider the offender’s “family and home environment,” “the
    circumstances of the homicide offense,” any substance abuse that may
    have played a role in the juvenile’s offense, and that juveniles have a
    greater capacity for rehabilitation than adults do. 
    Id. at 555–56
    (quoting
    Miller, 567 U.S. at 
    477, 132 S. Ct. at 2468
    ).
    In State v. Sweet, we adopted “a categorical rule that juvenile
    offenders may not be sentenced to life without the possibility of parole
    under article I, section 17 of the Iowa Constitution.” 
    879 N.W.2d 811
    , 839
    (Iowa 2016). Underlying this holding was our finding that a sentence of
    life without the possibility of parole required the sentencing judge to “do
    the impossible, namely, to determine whether the offender is ‘irretrievably
    corrupt’ at a time when even trained professionals with years of clinical
    experience would not attempt to make such a determination.” 
    Id. at 837.
    We concluded that the parole board is in the best position to determine
    whether the offender is invariably corrupt. 
    Id. at 839.
    In Propps, we upheld a juvenile offender’s indeterminate sentence
    with no mandatory minimum and immediate parole eligibility because it
    gave the juvenile the “potential for immediate parole if rehabilitation,
    maturity, and reform have been demonstrated.” 
    897 N.W.2d 91
    , 101 (Iowa
    2017). Moreover, in State v. Roby, we further developed the sentencing
    factors first set forth in Lyle, explaining that these factors should generally
    13
    mitigate the punishment of a juvenile offender so that sentencing courts
    can devise a “punishment that serves the best interests of the child and of
    society.” 
    897 N.W.2d 127
    , 144 (Iowa 2017) (quoting 
    Lyle, 854 N.W.2d at 402
    ). We also declined to categorically prohibit imposing a minimum term
    of incarceration without immediate parole eligibility on juvenile offenders
    convicted of first-degree murder as long as such sentences were only
    imposed after the sentencing judge considered the necessary mitigating
    factors associated with youth. 
    Id. at 148.
    Finally, in Zarate, we held that
    article I, section 17 of the Iowa Constitution did not categorically prohibit
    sentencing juveniles convicted of first-degree murder to “life with the
    possibility of parole after serving a minimum term of confinement as
    determined by the court,” or life with the possibility of immediate 
    parole. 908 N.W.2d at 843
    , 856 (quoting Iowa Code § 902.1(2)(a)(2)).
    B. Applying the Felony-Murder Rule to Juvenile Offenders.
    Harrison argues applying the felony-murder rule to juvenile offenders
    when their liability is grounded on a theory of aiding and abetting violates
    due process under the Iowa and United States Constitutions. Specifically,
    Harrison alleges the felony-murder rule is premised on the assumption
    that juvenile offenders who participate in a forcible felony can appreciate
    the potential consequences of their participation even though juvenile
    offenders are “not developed enough to appreciate not only the
    assumption, but the natural consequence of the [forcible felony] (i.e. the
    murder).”   Harrison relies primarily on our state and federal juvenile
    sentencing jurisprudence which recognizes that there is a “fundamental
    and virtually inexorable difference between juveniles and adults for the
    purposes of punishment.” 
    Lyle, 854 N.W.2d at 393
    . Further, Harrison
    reasons, even if he did understand the potential consequences of his
    participation in the robbery, science on juvenile development indicates
    14
    that he was incapable of controlling his impulses with regard to his
    participation in the murder. 2
    Iowa Code section 707.2(1)(b) states, “A person commits murder in
    the first degree when the person commits murder under any of the
    following circumstances . . . . The person kills another person while
    participating in a forcible felony.” Iowa Code § 707.2(1)(b) (2015). 3 This
    definition of first-degree murder is known as the felony-murder rule, and
    it “began as a common-law doctrine of criminal law that any death
    resulting from the commission or attempted commission of a felony
    constitutes murder.” State v. Tribble, 
    790 N.W.2d 121
    , 124 (Iowa 2010).
    “Felonies that have historically been used to support application of the
    felony-murder doctrine are those that are particularly serious or
    inherently dangerous.” 
    Id. In Iowa
    , the legislature has specified which
    felonies are classified as a “forcible felony” under the felony-murder rule
    in section 702.11(1).         A forcible felony includes “any felonious child
    endangerment, assault, murder, sexual abuse, kidnapping, robbery,
    human trafficking, arson in the first degree, or burglary in the first degree.”
    Iowa Code § 702.11(1).
    The felony-murder rule aims to deter people from committing those
    felonies the legislature has deemed inherently dangerous to the life of
    others. See 
    Tribble, 790 N.W.2d at 127
    . To promote deterrence, the rule
    transforms those felonies “into first-degree murder if a person is killed in
    the course of the felony, even though the felon had no specific intent or
    2The   State argues that Harrison did not preserve error on this issue since he
    waited to raise it until after the State had presented its case on the felony-murder theory.
    We assume error is preserved without addressing this challenge.
    3Though  Harrison was convicted in 2016, there has been no change in the felony-
    murder statute since the time of his trial. See Iowa Code § 707.2(1)(b) (2016).
    15
    premeditation otherwise necessary to elevate the killing of another into
    first-degree murder.” 
    Id. at 127–28.
    Consequently,
    [w]hen a person engages in conduct dangerous enough to be
    identified by our legislature as a predicate felony for felony
    murder, the elements of the felony-murder statute are
    satisfied if the person also engages in an act causing death
    while participating in the dangerous conduct.
    
    Id. at 126.
    “In other words, our legislature adopted felony murder to deter
    the commission of felonies, but not by totally eliminating the relationship
    between criminal intent and criminal liability.” 
    Id. at 128.
    In contrast to first-degree murder under section 707.2(1)(a), which
    requires a showing that the defendant “willfully, deliberately, and with
    premeditation kills another person,” first-degree murder under the felony-
    murder rule only requires a showing that the defendant acted with the
    specific intent to commit the predicate felony that led to the killing.
    Compare Iowa Code § 707.2(1)(a), with 
    id. § 707.2(1)(b).
    This difference
    between the intent required for premeditated murder and felony murder
    has produced confusion and a lack of conformity in the way our court and
    other courts have explained the felony-murder rule in the past.        For
    example, Harrison notes that our court previously stated in State v.
    Heemstra, that the elements of premeditated murder under section
    707.2(1)—namely that the murder was committed “willfully, deliberately,
    and with premeditation”—“are presumed to exist if the State proves
    participation in the underlying forcible felony” for a charge of felony
    murder. 
    721 N.W.2d 549
    , 554 (Iowa 2006) (quoting Iowa Code § 707.2(1)
    (2001)). Harrison capitalizes on this language in his argument that the
    felony-murder rule creates a conclusive presumption that the defendant
    committed the killing with malice aforethought in violation of the Due
    Process Clauses of the Iowa and United States Constitutions.
    16
    The Fifth and Fourteenth Amendments of the United States
    Constitution, and Article I, section 9 of the Iowa Constitution, prohibit the
    state from depriving any person of “life, liberty, or property, without due
    process of law.” U.S. Const. amends. V, XIV; Iowa Const. art. I, § 9. “ ‘Due
    process requires fundamental fairness in a judicial proceeding,’ so a trial
    that is fundamentally unfair violates the guarantees of due process in the
    United States and Iowa Constitutions.” More v. State, 
    880 N.W.2d 487
    ,
    499 (Iowa 2016) (quoting State v. Becker, 
    818 N.W.2d 135
    , 148 (Iowa
    2012), overruled on other grounds by 
    Alcala, 880 N.W.2d at 708
    & n.3).
    “[T]he Due Process Clause protects the accused against conviction except
    upon proof beyond a reasonable doubt of every fact necessary to constitute
    the crime with which he is charged.” In re Winship, 
    397 U.S. 358
    , 364, 
    90 S. Ct. 1068
    , 1073 (1970).       We have recognized that “a mandatory
    presumption violates the due process clause because it undermines the
    fact finder’s responsibility to find the ultimate facts beyond a reasonable
    doubt.”   State v. Winders, 
    359 N.W.2d 417
    , 419 (Iowa 1984).          “[T]his
    presumption would conflict with the overriding presumption of innocence
    with which the law endows the accused and which extends to every
    element of the crime.” Sandstrom v. Montana, 
    442 U.S. 510
    , 522, 
    99 S. Ct. 2450
    , 2458 (1979) (emphasis omitted) (quoting Morissette v. United States,
    
    342 U.S. 246
    , 275, 
    72 S. Ct. 240
    , 256 (1952)).
    We have previously addressed a due process challenge like the one
    Harrison now makes regarding the alleged presumptions incorporated in
    the felony-murder rule, as well as application of the felony-murder rule to
    defendants who were convicted of felony-murder for aiding and abetting a
    felony.   See generally Conner v. State, 
    362 N.W.2d 449
    (Iowa 1985).
    Similar to this case, the defendant in Conner claimed “that conclusively
    attributing malice aforethought to him in relation to the killing, merely
    17
    from his participation in the underlying felony,” violated his right to due
    process under the Fourteenth Amendment of the United States
    Constitution. 
    Id. at 455.
    Like Harrison, the defendant argued that the
    felony-murder rule creates an unconstitutional presumption that takes
    the burden off the state to prove the requisite culpability for murder. 
    Id. at 456.
    We rejected this argument, holding it was “misplaced” because
    “[a]ccomplice liability . . . is a matter of substantive law that places
    responsibility on a wrongdoer for the direct and indirect consequences of
    his joint criminal conduct with another.” Id.; see also State v. Nowlin, 
    244 N.W.2d 596
    , 604–05 (Iowa 1976) (“The felony-murder statute does not
    relieve the State of the burden of proving essential elements of first-degree
    murder. The elements [of willfulness, deliberation, and premeditation]
    alleged by defendant to be essential are not essential [to felony murder].”).
    Finally, we exclaimed, “The State, through the enactment of laws, has a
    right to prescribe the nature of the acts that constitute criminal conduct.”
    
    Conner, 362 N.W.2d at 456
    .
    Despite our rejection of Harrison’s argument in Conner, Harrison
    argues Conner is not controlling because we did not decide Conner under
    the Iowa Constitution, it did not involve a juvenile offender, and it directly
    contradicts our recognition in Heemstra of the presumptions inherent to
    the felony-murder rule. While we acknowledge our court previously stated
    in Heemstra that the felony-murder rule presumes the defendant
    committed the killing with malice, we were not speaking to the
    constitutional issue now raised. 
    See 721 N.W.2d at 554
    . As such, that
    language is not controlling in this case.
    The felony-murder rule does not create a conclusive presumption
    that the defendant committed the murder “willfully, deliberately, and with
    premeditation,” because these are not elements of first-degree felony
    18
    murder in Iowa. 
    Nowlin, 244 N.W.2d at 604
    –05. The substantive statutory
    definition of first-degree felony murder in Iowa does not include these
    elements since the state is only required to show the specific intent to
    commit the predicate felony rather than show the defendant acted with
    premeditation and deliberation to commit murder.                      See Iowa Code
    § 707.2(1)(b). This is a substantive rule of law in Iowa and not simply an
    evidentiary shortcut to find malice or a presumption that malice existed
    on the part of the defendant. Consequently, whether the defendant acted
    “willfully, deliberately, and with premeditation” is wholly irrelevant when
    the defendant is charged with felony murder, regardless of the dicta
    Harrison cites from Heemstra. “In that event the ‘conclusive presumption’
    is no more than a procedural fiction that masks a substantive reality, to
    wit, that as a matter of law malice is not an element of felony murder.”
    People v. Dillon, 
    668 P.2d 697
    , 717 (Cal. 1983) (en banc). Therefore, it does
    not follow that the felony-murder rule violates the Due Process Clauses of
    the Iowa or United States Constitutions by creating a conclusive and
    unconstitutional presumption about the defendant’s intent to commit
    murder. Our ruling is supported by a number of other states, which have
    likewise considered and rejected claims that the felony-murder rule
    violates due process because it creates an unconstitutional presumption
    that the defendant committed the killing with malice aforethought. 4
    4See, e.g., State v. Herrera, 
    859 P.2d 131
    , 140 (Ariz. 1993) (en banc) (rejecting a
    constitutional challenge to the Arizona felony-murder rule that claimed the rule
    unconstitutionally presumed the defendant’s intent to kill based on the intent to commit
    the underlying felony); 
    Dillon, 668 P.2d at 717
    –18 (holding the felony-murder rule does
    not create a conclusive presumption of the existence of an element of the crime in
    violation of the Due Process Clause of the Fourteenth Amendment since malice
    aforethought is not an element of felony murder); State v. Goodseal, 
    553 P.2d 279
    , 286
    (Kan. 1976) (holding the felony-murder rule did not constitute cruel and unusual
    punishment or the denial of equal protection and due process since “it is to protect
    human life, represents sound public policy, is reasonably related to the end sought to be
    accomplished and is not constitutionally impermissible”), overruled on other grounds by
    19
    By asking us to rely on a procedural fiction to hold that the felony-
    murder rule creates an unconstitutional presumption about the intent of
    juvenile offenders, Harrison is essentially asking us to implement greater
    due process rights for juvenile offenders than adult offenders. Harrison is
    right that we have recognized that “children are constitutionally different
    from adults,” 
    Seats, 865 N.W.2d at 556
    (quoting 
    Miller, 567 U.S. at 471
    ,
    State v. Underwood, 
    615 P.2d 153
    , 162–63 (Kan. 1980); Evans v. State, 
    349 A.2d 300
    ,
    329–30, 336–37 (Md. Ct. Spec. App. 1975) (holding the felony-murder rule did not violate
    due process because it is not a “mere pale reflection[ ] of willful, deliberate, and
    premeditated killing” since it has a different substantive definition of murder);
    Commonwealth v. Watkins, 
    379 N.E.2d 1040
    , 1049 (Mass. 1978) (The felony-murder rule
    is not unconstitutional under the Fourteenth Amendment because “[t]he Commonwealth
    is not, pursuant to the operation of the felony-murder rule, ‘relieved’ of its duty prescribed
    by the United States Supreme Court in In re Winship, 
    397 U.S. 358
    , 
    90 S. Ct. 1068
    , 25
    L. Ed 2d 368 (1970), of proving every fact necessary to the crime as charged beyond a
    reasonable doubt. Nor is the burden of proof as to an element of the crime charged
    ‘affirmatively shifted’ from the Commonwealth to the defendant as prohibited by the
    Supreme Court in Mullaney v. Wilbur, 
    421 U.S. 684
    , 701, 
    95 S. Ct. 1881
    , 
    44 L. Ed. 2d 508
    (1975).”); State v. Burkhart, 
    103 P.3d 1037
    , 1046–47 (Mont. 2004) (holding the felony-
    murder rule does not violate due process since intent to kill is not an element of the crime
    under the felony-murder rule); State v. Bradley, 
    317 N.W.2d 99
    , 101–02 (Neb. 1982)
    (rejecting defendant’s argument that the felony-murder rule conclusively presumes
    malice from the criminal intention to commit certain felonies and therefore violates “the
    rule against irrebuttable presumptions [as] stated in Mullaney v. Wilbur, 
    421 U.S. 685
    ,
    
    96 S. Ct. 1881
    . . . (1975)”); State v. Campos, 
    921 P.2d 1266
    , 1272 (N.M. 1996) (“[T]he
    felony-murder doctrine in New Mexico does not abandon the mens rea requirement for
    murder, nor does it create a presumption that a defendant had intended to kill whenever
    a homicide occurs during the course of a felony. Our felony-murder rule only serves to
    raise second-degree murder to first-degree murder when the murder is committed in the
    course of a dangerous felony.” (Citation omitted.)); State v. Swift, 
    226 S.E.2d 652
    , 668–
    69 (N.C. 1976) (holding the felony-murder rule does not involve any presumption of
    premeditation and deliberation that would violate the Due Process Clause of the
    Fourteenth Amendment because those are not elements of the crime of felony murder);
    Gore v. Leeke, 
    199 S.E.2d 755
    , 757 (S.C. 1973) (holding the felony-murder rule did not
    violate the Due Process Clauses of the South Carolina and Federal Constitutions because
    it does not create a conclusive presumption of malice that would allow the “defendant to
    be convicted of murder without the State’s proving the element of malice beyond a
    reasonable doubt”); State v. Wanrow, 
    588 P.2d 1320
    , 1325 (Wash. 1978) (en banc) (“The
    argument that the felony-murder presumes the existence of intent to kill misconstrues
    the nature of the felony-murder rule and must be rejected.”), superseded by statute as
    recognized in In re Pers. Restraint of Andress, 
    56 P.3d 981
    , 984, 988 (Wash. 2002); State
    ex rel. Peacher v. Sencindiver, 
    233 S.E.2d 425
    , 426–27 (W. Va. 1977) (rejecting a
    constitutional challenge to the felony-murder rule under the Due Process Clauses
    because the felony-murder rule does not require a showing of malice and therefore does
    not create a presumption that defendant committed the killing with malice).
    
    20 132 S. Ct. at 2464
    ), for sentencing purposes due to “the features of
    youthful behavior, such as ‘immaturity, impetuosity, and failure to
    appreciate risks and consequences.’ ”     
    Lyle, 854 N.W.2d at 404
    n.10
    (quoting Miller, 567 U.S. at 
    477, 132 S. Ct. at 2468
    ). Yet, we have never
    held or implied that these constitutionally recognized differences require
    our court or the legislature to transform the elements of any given offense
    to account for these differences. Harrison seeks to expand the scope of our
    juvenile sentencing jurisprudence far beyond its rational reach.
    “Harm to a victim is not lessened because of the young age of an
    offender.” 
    Propps, 897 N.W.2d at 102
    . “[W]hile youth is a mitigating factor
    in sentencing, it is not an excuse.” 
    Lyle, 854 N.W.2d at 398
    (quoting 
    Null, 836 N.W.2d at 75
    ). Consequently, our “constitutional analysis is not about
    excusing juvenile behavior, but imposing punishment in a way that is
    consistent with our understanding of humanity today.”          
    Propps, 897 N.W.2d at 102
    (quoting 
    Lyle, 854 N.W.2d at 398
    ). We do this by providing
    juveniles with an individualized sentencing process that incorporates a
    number of mitigating factors associated with “the features of youthful
    behavior.” 
    Lyle, 854 N.W.2d at 404
    n.10; see also 
    Zarate, 908 N.W.2d at 855
    –56. Nevertheless,
    the State has a legitimate interest in holding persons
    responsible for their criminal acts. When those acts are
    particularly serious, as in the case of forcible felonies, it is
    logical that the State would assign grave consequences to
    them . . . . “Having placed certain designated crimes
    committed by juveniles who have reached the age of sixteen
    within the criminal court jurisdiction, the legislature
    presumably thought the need for adult discipline and legal
    restraint was necessary in these cases.”
    State v. Mann, 
    602 N.W.2d 785
    , 792–93 (Iowa 1999) (quoting State v. Terry,
    
    569 N.W.2d 364
    , 367 (Iowa 1997)).
    21
    Harrison does not provide us with any reason for further intruding
    upon the role of the legislature to expand our juvenile sentencing
    jurisprudence to hold that juvenile offenders cannot be tried for certain
    crimes altogether due to their mens rea requirements. No other state that
    has considered this issue has abolished the application of the felony-
    murder rule to juvenile offenders. 5             Moreover, despite the controversy
    surrounding the felony-murder rule, few states have actually abolished the
    felony-murder rule, and one of these states has only abrogated the
    common law felony-murder rule as opposed to a statutory version. 6
    Notably, with the exception of Michigan, those states that have abolished
    the use of the felony-murder rule have done so through statutes enacted
    by their state legislatures as opposed to judicial abrogation.
    5California  is the only state we are aware of that has considered abolishing the
    application of the felony-murder rule to juvenile offenders on constitutional grounds. This
    was based on the argument that juvenile offenders cannot foresee the consequences of
    their actions. A California Court of Appeal rejected this argument. People v. Richardson,
    No. A134783, 
    2013 WL 2432510
    , at *5 (Cal. Ct. App. June 4, 2013) (rejecting a juvenile
    offender’s argument that his conviction for felony murder violated his due process rights
    because his age rendered him incapable of foreseeing the consequences of his decision to
    participate in a robbery and noting that “[w]here, as in this case, the killing occurred
    during the course of an independent felony (robbery), Richardson’s participation in the
    commission of that crime made him liable for the murder committed during the course
    of the robbery, even if the killing was not a natural, reasonable, or probable consequence
    of that crime”).
    6See Haw. Rev. Stat. Ann. § 707–701 (West, Westlaw through Act II of the 2018
    Reg. Sess.) (first-degree murder requires the actor to commit the killing “intentionally and
    knowingly”); Ky. Rev. Stat. Ann. § 507.020 (West, Westlaw through Chs. 74, 96–154, 158–
    164, & 170 of 2018 Reg. Sess.) (first-degree murder requires “intent to cause the death
    of another person”); Ohio Rev. Code Ann. § 2903.01(B) (West, Westlaw through File 66 of
    132d Gen. Assemb. (2017–2018)) (requiring a person to “purposely” cause the death of
    another during the course of a felony in order for the crime to meet the definition of
    aggravated murder); People v. Aaron, 
    299 N.W.2d 304
    , 328–29 (Mich. 1980) (“We conclude
    that Michigan has no statutory felony-murder rule which allows the mental element of
    murder to be satisfied by proof of the intention to commit the underlying felony. Today
    we exercise our role in the development of the common law by abrogating the common-
    law felony-murder rule.”).
    22
    Further, Harrison misrepresents the felony-murder rule in his
    argument that it is premised on the ability to foresee danger. Though the
    inherent dangerousness of the forcible felonies encompassed within the
    felony-murder rule may make certain killings foreseeable, the felony-
    murder rule encompasses unforeseeable crimes. The premise of the rule
    is that there are certain felonies that “are so inherently dangerous that
    proof of participating in these crimes may obviate the need for showing all
    of the elements normally required for first-degree murder.” 
    Heemstra, 721 N.W.2d at 554
    . Robbery, especially armed robbery, requires the use of
    force and is “so inherently dangerous” that participating in it as the
    principal or aider and abettor in the manner that Harrison did carries with
    it an undeniable prospect of grave harm to the life of others. See 
    Conner, 362 N.W.2d at 456
    .
    The fact that killing was not within the actual contemplation
    and intention of one of the parties to the robbery does not
    relieve such person of the responsibility as long as the other
    party to the robbery had the necessary mens rea and the act
    was a consequence of carrying out the unlawful common
    design.
    
    Id. at 455.
    Thus, foreseeability is irrelevant to the felony-murder rule, and
    Harrison’s alleged inability to foresee the consequences of his decision to
    participate in a robbery is likewise irrelevant to his conviction.
    Finally, Harrison’s contentions that he could not foresee the
    consequences of his decision to participate in a robbery, or that he could
    not control his impulses even if he could foresee the consequences, are
    irreconcilable with his admitted role in the commission of the robbery.
    Harrison admitted that he knew Collins was going to commit a “lick” when
    Harrison knowingly accompanied him to Hickman Lane that day.
    Harrison then lured McHenry to Collins and used force against him to help
    Collins carry out the robbery.     By participating in robbery—a forcible
    23
    felony that the Iowa legislature has deemed inherently dangerous to
    human life—Harrison became liable for any killing committed in the
    commission of that offense by him or Collins. While there may be a unique
    factual situation in which the felony-murder rule is unconstitutional as
    applied to a certain juvenile offender, this is not that case. Therefore, we
    decline to hold that the felony-murder rule is fundamentally unfair or that
    it violates due process under the Iowa or United States Constitutions when
    applied to juvenile offenders pursuant to a theory of aiding and abetting.
    C. Sentencing Juveniles Convicted Under the Felony-Murder
    Rule. Harrison presents both an as-applied and categorical constitutional
    challenge to his sentence of life imprisonment with immediate parole
    eligibility. Harrison argues that the sentence of life imprisonment with the
    possibility of immediate parole for juvenile offenders convicted of first-
    degree murder as an accomplice to felony murder constitutes cruel and
    unusual punishment under the Iowa and United States Constitutions.
    Further, Harrison claims his sentence of life imprisonment with the
    possibility of immediate parole is “grossly disproportionate to [his]
    ultimate[ ] culpability” since he “did not personally murder any individual,
    [and] no evidence was presented that he knew a murder would happen or
    was likely to happen.”
    1. Categorical challenge.    We analyze categorical challenges to a
    sentence through a two-step inquiry. 
    Lyle, 854 N.W.2d at 386
    . We first
    review “ ‘objective indicia of society’s standards, as expressed in legislative
    enactments and state practice’ to determine whether there is a national
    consensus against the sentencing practice at issue.” 
    Id. (quoting Graham,
    560 U.S. at 
    61, 130 S. Ct. at 2022
    ). Next, we examine “our controlling
    precedents and our interpretation of the Iowa Constitution’s text, history,
    meaning, and purpose to guide our own independent judgment on the
    24
    constitutionality of the challenged sentence.” 
    Zarate, 908 N.W.2d at 843
    .
    We also assess “the culpability of the offenders at issue in light of their
    crimes and characteristics, along with the severity of the punishment in
    question,” as well as whether the sentencing practice furthers legitimate
    penological goals. 
    Lyle, 854 N.W.2d at 386
    (quoting 
    Graham, 560 U.S. at 67
    , 130 S. Ct. at 2026).
    First, there is not a national consensus against sentencing juvenile
    offenders convicted of felony murder as the principal or accomplice to life
    imprisonment         with     immediate       parole     eligibility,    and     Harrison
    acknowledges this.          In fact, he “is not aware of any state that has
    categorically held that life with the possibility of parole should be
    categorically prohibited for juveniles convicted of felony murder.” 7 The
    7We are also not aware of any state that has considered a categorical challenge to
    the specific sentence of life imprisonment with immediate parole eligibility for a juvenile
    offender convicted under the felony-murder rule. One state, North Carolina, has similarly
    considered a constitutional challenge to the sentence of life with the possibility of parole
    after a prison term of twenty-five years for a juvenile offender convicted under the felony-
    murder rule. See State v. Jefferson, 
    798 S.E.2d 121
    , 122–23 (N.C. Ct. App. 2017). The
    North Carolina Court of Appeals upheld the constitutionality of the sentence as applied
    to the defendant, noting it was “neither an explicit nor a de facto term of life imprisonment
    without parole.” 
    Id. at 125.
            A few other states have considered the constitutionality of lengthy term of years
    sentences or sentences of life imprisonment for juvenile offenders convicted under the
    felony-murder rule. Those states have declined to find such sentences are categorically
    unconstitutional. See Bell v. State, No. CR 10–1262, 
    2011 WL 4396975
    , at *2–3 (Ark.
    Sept. 22, 2011) (rejecting defendant’s petition for recall and resentencing involving his
    sentence to two consecutive life sentences for his convictions on two counts of first-degree
    murder committed as an accomplice when he was sixteen years old and that
    “[n]otwithstanding his claim that he was only an accomplice, we have held that there is
    no distinction between principals on the one hand and accomplices on the other, insofar
    as criminal liability is concerned”); People v. Jordan, No. D064010, 
    2016 WL 6996216
    , at
    *14 (Cal. Ct. App. Nov. 30, 2016) (upholding the twenty-five-year-to-life sentence of
    juvenile offenders convicted of felony murder noting other California appellate courts
    “have rejected arguments by juvenile offenders that a sentence for first degree murder
    violates the proportionality principle of the California Constitution even though the
    defendant was not the person who committed the killing, when the defendant knowingly
    participated in a serious crime that led to the murder”); Arrington v. State, 
    113 So. 3d 20
    ,
    27–28 (Fla. Dist. Ct. App. 2012) (declining to adopt a categorical rule prohibiting the
    sentence of life imprisonment without the possibility of parole for juvenile offenders
    convicted under the felony-murder rule); State v. Ali, 
    855 N.W.2d 235
    , 258–59 (Minn.
    25
    national consensus remains in favor of subjecting juvenile offenders
    convicted of first-degree murder under the felony-murder rule—regardless
    of whether an offender was aiding and abetting or the principal actor—to
    the   same     sentencing      options     as    juvenile    offenders     convicted     of
    premeditated first-degree murder. 8
    2014) (noting the constitutionality of life sentences for juveniles convicted of felony
    murder); cf. 
    Dillon, 668 P.2d at 700
    –01, 727 (holding a seventeen year-old’s sentence of
    life imprisonment for felony murder was unconstitutional as applied where the offender
    fatally shot his victim out of fear for his life in the course of trying to steal marijuana
    plants from the victim’s farm when the victim—who had previously made threats about
    shooting the defendant for being on his property—began approaching the defendant with
    a shotgun in his possession.
    8A  sampling of the sentencing statutes of other states reveals that most states do
    not distinguish between premeditated murder and felony murder for the purpose of
    sentencing juvenile or adult offenders. See, e.g., Ala. Code § 13A-6-2 (Westlaw through
    Act 2018–579) (classifying felony murder as first-degree murder and codifying the
    punishment for juvenile offenders who commit murder to be either life imprisonment
    without parole or life); Alaska Stat. Ann. § 11.41.100(a)(2)–(5) (West, Westlaw through ch.
    7 of 2018 2d Reg. Sess.) (classifying felony murder as first-degree murder); 
    id. § 12.55.125(b)
    (treating all types of first-degree murder the same for sentencing
    purposes); Ariz. Rev. Stat. Ann. § 13-1105(A)(2) (Westlaw through May 18, 2018 of 2d
    Reg. Sess.) (classifying felony murder as a form of first-degree murder); 
    id. § 13-751(A)(2)
    (A juvenile offender convicted of first-degree murder “shall be sentenced to imprisonment
    in the custody of the state department of corrections for life or natural life.”); Ark. Code
    Ann. § 5-10-101 (West, Westlaw through Acts 1–3, 5, 11, 12 & 13 from 2018 2d
    Extraordinary Sess.) (designating felony murder a capital offense and mandating any
    defendant under eighteen “at the time he or she committed the capital murder [be
    sentenced to] life imprisonment with the possibility of parole after serving a minimum of
    thirty (30) years’ imprisonment”); Del. Code Ann. tit. 11, § 636 (classifying felony murder
    as murder in the first degree) (West, Westlaw through 81 Laws 2018, chs. 200–253);
    
    id. 4209A (All
    juvenile offenders who are convicted of first-degree murder “shall be
    sentenced to term of incarceration not less than 25 years to be served at Level V up to a
    term of imprisonment for the remainder of the person’s natural life to be served at Level
    V without benefit of probation or parole or any other reduction.”); Ga. Code Ann. § 17-
    10-6.1(a)(1), (c)(1) (West, Westlaw through Act 562 of 2018 Leg. Sess.) (listing “[m]urder
    or felony murder” as “serious violent felon[ies]” for which adult and juvenile offenders can
    be sentenced to life imprisonment with a minimum term of thirty years in prison before
    any form of parole eligibility is available); Idaho Code Ann. § 18–4004 (West, Westlaw
    through 2018 2d Reg. Sess.) (“[E]very person guilty of murder of the first degree shall be
    punished . . . by imprisonment for life.”); 
    id. § 18–4003(d)
    (classifying felony murder as
    first-degree murder); La. Stat. Ann. § 14:30(A) (Westlaw through 2018 1st Extraordinary
    Sess.) (defining first-degree murder, which includes felony murder); 
    id. § 15:574.4(E)(1)(a)
    (A juvenile offender convicted of first-degree murder may become parole eligible after
    “[t]he offender has served twenty-five years of the sentence imposed”); Nev. Rev. Stat.
    Ann. § 200.030 (West, Westlaw through 2017 Reg. Sess.)) (classifying felony murder as
    26
    In addition to the national consensus in favor of treating felony
    murder and premeditated murder the same for sentencing purposes, there
    are objective indicia that the Iowa legislature has adopted this standard
    regarding the challenged sentencing practice. “Legislative judgments can
    be ‘the most reliable objective indicators of community standards for
    purposes of determining whether a punishment is cruel and unusual.’ ”
    
    Lyle, 854 N.W.2d at 388
    (quoting State v. Bruegger, 
    773 N.W.2d 862
    , 873
    (Iowa 2009)). The legislature is aware of the different forms of first-degree
    murder, yet it has declined to treat them differently for sentencing
    purposes. This legislative decision to require mandatory life imprisonment
    with the possibility of immediate parole for juvenile offenders convicted of
    either premeditated murder or felony murder is indicative of a consensus
    in Iowa in favor of the challenged sentencing practice.
    Despite the fact that there is no national consensus in opposition to
    the challenged sentencing practice based on the laws of other states,
    Harrison asks us to consider “that many legal scholars throughout the
    first-degree murder and subjecting defendants convicted of first-degree murder to a
    minimum sentence of twenty years imprisonment before parole eligibility); Tex. Penal
    Code § 19.03 (West, Westlaw through 2017 Reg. & 1st Called Sess.) (including “capital
    felony” in the definition of “capital murder”); 
    id. § 12.31(1)
    (“An individual adjudged guilty
    of a capital felony in a case in which the state does not seek the death penalty shall be
    punished by imprisonment in the Texas Department of Criminal Justice for: (1) life, if the
    individual committed the offense when younger than 18 years of age.).
    North Carolina is the only state we are aware of that differentiates between
    premeditated and felony murder for juvenile sentencing purposes. Under this statute,
    an offender convicted of first-degree murder under the felony-murder rule shall be
    sentenced “to life imprisonment with parole.” N.C. Gen. Stat. Ann. § 15A-1340.19B(a)(1)
    (West, Westlaw through 2017 Reg. Sess.). For juvenile offenders, “ ‘life imprisonment
    with parole’ shall mean that the defendant shall serve a minimum of 25 years
    imprisonment prior to becoming eligible for parole.” 
    Id. § 15A-1340.19A.
    Meanwhile, a
    defendant convicted of premeditated first-degree murder “should be sentenced to life
    imprisonment without parole . . . or a lesser sentence of life imprisonment with parole.”
    
    Id. § 15-1340.19B(a)(2).
    Nevertheless, this sentencing scheme still requires juvenile
    offenders in North Carolina to serve a definite term of imprisonment that exceeds
    Harrison’s sentence of life imprisonment with immediate parole eligibility.
    27
    country have not only routinely held that the felony murder rule is
    improper, but have specifically argued for the abolishment of the felony
    murder rule as applied to juveniles.” Nevertheless, much of the scholarly
    criticism—including from some of the legal scholars Harrison cites—of
    applying the felony-murder rule to juveniles focuses on the sentence of life
    without parole that many jurisdictions impose on juveniles convicted of
    felony murder. See, e.g., Steven A. Drizin & Allison McGowen Keegan,
    Abolishing the Use of the Felony-Murder Rule When the Defendant Is a
    Teenager, 28 Nova L. Rev. 507, 536, 541 (2004) (noting “it is debatable as
    to whether we should ease the prosecution’s burden for a crime that can
    carry the death penalty or life without possibility of parole, and especially
    debatable when child defendants are involved and concluding that
    juveniles “convicted of felony murder should be exempted from the
    sentence of life without the possibility of parole”); Erin H. Flynn, Comment,
    Dismantling the Felony-Murder Rule: Juvenile Deterrence and Retribution
    Post-Roper v. Simmons, 156 U. Pa. L. Rev. 1049, 1068 (2008) (“If convicted
    of a felony-murder charge, juveniles are often subject to corresponding
    mandatory sentencing laws that remove a judge’s discretion to account for
    a juvenile offender’s individual characteristics and his level of threat to
    public safety.”).   We already quashed these concerns surrounding
    sentencing juveniles convicted of felony murder to life imprisonment
    without parole in Sweet where we held sentencing juvenile offenders to life
    imprisonment without the possibility of parole violates the Iowa
    Constitution. See 
    Sweet, 879 N.W.2d at 839
    .
    While there is not a national consensus against the sentencing
    practice at issue, this does not end our inquiry into Harrison’s categorical
    challenge to sentencing juvenile offenders convicted of felony murder to
    life imprisonment with immediate parole eligibility. We still must “consider
    28
    our    controlling    precedents    and    our   interpretation   of   the   Iowa
    Constitution’s text, history, meaning, and purpose to guide our own
    independent judgment on the constitutionality of the challenged
    sentence.”       
    Zarate, 908 N.W.2d at 843
    .      Likewise, we must “evaluate
    whether the challenged sentencing practice serves legitimate penological
    goals.”    
    Id. This also
    requires us to examine “the culpability of the
    offenders at issue in light of their crimes and characteristics along with
    the severity of the punishment in question.” 
    Lyle, 854 N.W.2d at 386
    (quoting 
    Graham, 560 U.S. at 67
    , 130 S. Ct. at 2026).
    “We seek to interpret our constitution consistent with the object
    sought to be obtained at the time of adoption as disclosed by the
    circumstances.” Chiodo v. Section 43.24 Panel, 
    846 N.W.2d 845
    , 851 (Iowa
    2014).         Nevertheless, “originalism may not be the best guide for
    interpreting our constitution’s cruel and unusual punishment clause in
    light of the changes to juvenile sentencing” since “juveniles over the age of
    fourteen were tried and sentenced as adults when our constitution was
    adopted.” 
    Zarate, 908 N.W.2d at 846
    . Yet, an analysis of our own juvenile
    sentencing        jurisprudence    supports    sentencing   juvenile   offenders
    convicted of felony murder to life imprisonment with immediate parole
    eligibility.
    Both our juvenile sentencing jurisprudence and that of the United
    States Supreme Court centers around the “fundamental and virtually
    inexorable difference between juveniles and adults for the purposes of
    punishment.”        
    Lyle, 854 N.W.2d at 393
    .       Because of this difference,
    “juveniles convicted of crimes must be afforded a ‘meaningful opportunity
    to obtain release based on demonstrated maturity and rehabilitation.’ ”
    
    Louisell, 865 N.W.2d at 602
    (quoting 
    Graham, 560 U.S. at 75
    , 130 S. Ct.
    at 2030). Nevertheless, Harrison does not argue as part of his categorical
    29
    challenge that the sentence of life imprisonment with the immediate
    possibility of parole for juvenile offenders convicted of felony murder
    denies these offenders “a ‘meaningful opportunity to obtain release based
    on demonstrated maturity and rehabilitation.’ ” 9 
    Id. Rather, he
    largely
    repeats the same argument he made with regard to banning the
    application of the felony-murder rule to juveniles—namely, that “juveniles
    lack the ability to form the proper foreseeability, lack the appreciation of
    consequences, and are highly impulsive.” However, we held in Propps that
    “[t]he constitutional analysis is not about excusing juvenile behavior, but
    imposing punishment in a way that is consistent with our understanding
    of humanity today.” 
    Propps, 897 N.W.2d at 102
    (alteration in original)
    (quoting 
    Lyle, 854 N.W.2d at 398
    ).
    Thus, in our previous juvenile sentencing cases, “we sought to
    eliminate the mandatory nature of mandatory minimums and sentences
    that were the functional equivalent of life without parole because those
    sentences did not offer juveniles a ‘meaningful opportunity’ to demonstrate
    their rehabilitation before the parole board.” 
    Id. at 101.
    Consequently,
    unlike the mandatory life without parole that adults who commit first-
    degree murder are subject to, there is no mandatory minimum term of
    confinement for juvenile offenders convicted of first-degree murder.
    Compare Iowa Code § 902.1(1) (2016), with 
    id. § 902.1(2)(a)(2)–(3).
    Likewise, Iowa provides juvenile offenders convicted of first-degree murder
    “with an individualized sentencing hearing that takes into account their
    youth and a number of other mitigating factors that provide juveniles with
    9Harrison does argue along these lines in his reply brief regarding his as-applied
    challenge. Specifically, Harrison notes that he is eligible for parole under his current
    sentence, but “the ability of parole appears to be a legal fiction more than a real
    opportunity.” Thus, we will address that argument as part of his as-applied challenge.
    30
    more leniency in the sentencing process.” 
    Zarate, 908 N.W.2d at 846
    .
    Compare Iowa Code § 902.1(1), with 
    id. § 902.1(2)(b)(2)(a)–(v).
    Similarly, the parole board provides juvenile offenders with “an
    individualized analysis that considers the juvenile’s past, in addition to
    current psychiatric and psychological evaluations, the time already served
    on the sentence, any reports of misconduct or good behavior, and the
    inmate’s attitude and behavior while incarcerated.” 
    Propps, 897 N.W.2d at 102
    ; see also Iowa Code § 906.5(3). This individualized analysis allows
    the parole board to take into account the culpability of the offender,
    including the possibility that the offender was less culpable when he or
    she was aiding and abetting the principal actor in a felony-murder
    situation. We have repeatedly held that “the parole board [is] best situated
    to discern which juvenile homicide offenders have benefited from
    opportunities for maturation and rehabilitation.” 
    Propps, 897 N.W.2d at 102
    .
    Unlike a sentencing judge, “[t]he parole board has the benefit of
    seeing the individual offender’s actual behavior, rather than having to
    attempt to predict chances at maturity and rehabilitation based on
    speculation.” 
    Id. As a
    result, the parole board may decide to continue
    confinement of the juvenile “[i]f rehabilitation has not yet occurred” until
    he or she “has demonstrated through his or her own actions the ability to
    appreciate the severity of the crime.”   
    Id. “This is
    consistent with the
    approach of our prior holdings in the area of juvenile sentencing, because
    it allows for a realistic and meaningful opportunity for parole upon the
    juvenile’s demonstration of maturity and rehabilitation.” 
    Id. “In addition
    to our understanding and interpretation of the Iowa
    Constitution, we also consider whether the challenged sentencing practice
    serves legitimate penological goals and the culpability of the offender at
    31
    issue.” 
    Zarate, 908 N.W.2d at 847
    . We traditionally take into account the
    penological      goals     of     rehabilitation,    retribution,    deterrence,    and
    incapacitation.          
    Id. Nevertheless, rehabilitation
       is   the   primary
    consideration in the juvenile sentencing context “due to the increased
    capacity of juveniles to reform in comparison to adults.” 
    Id. In Zarate,
    we
    held that the statutory juvenile sentencing options of life imprisonment
    with the possibility of immediate parole, or life imprisonment with parole
    eligibility after a minimum term of confinement, “align with our focus on
    rehabilitation     and         allow   sentencing    judges   to     acknowledge     the
    fundamental concept of our juvenile sentencing jurisprudence that
    children are different from adults and should be treated differently due to
    their increased potential for rehabilitation.” 
    Id. Despite our
    emphasis on rehabilitation, juvenile sentences may still
    aim to promote additional penological goals, including deterrence,
    retribution, and incapacitation.             We previously noted this in Roby,
    explaining, “[I]t may be appropriate retribution to incarcerate a juvenile for
    a short time without the possibility of parole. Additionally, a sentencing
    judge could properly conclude a short term of guaranteed incarceration is
    necessary to protect the 
    public.” 897 N.W.2d at 142
    .          Ultimately,
    “[c]riminal punishment can have different goals, and choosing among
    them is within a legislature’s discretion.” State v. Oliver, 
    812 N.W.2d 636
    ,
    646 (Iowa 2012) (alteration in original) (quoting 
    Graham, 560 U.S. at 71
    ,
    130 S. Ct. at 2028).
    Though Harrison is correct to note that deterrence and retribution
    are less applicable to juveniles due to their diminished culpability, they
    still carry “some weight depending on the circumstances of each case.”
    
    Zarate, 908 N.W.2d at 854
    .               As we declared in Propps, “[c]ompletely
    eliminating the mandatory imposition of a prison term, even when the term
    32
    is indeterminate and the individual is immediately eligible for parole,
    would not serve the proportionality concept we have addressed in our
    previous juvenile sentencing 
    cases.” 897 N.W.2d at 101
    . “While juveniles
    may be more prone to reform and rehabilitation because of their age and
    the attendant characteristics of youth, they must also understand the
    severity of their actions.” 
    Id. at 102.
    Frankly, the “[h]arm to [the] victim
    is not lessened because of the young age of [the] offender.” 
    Id. Thus, “while
    youth is a mitigating factor in sentencing, it is not an excuse.” 
    Lyle, 854 N.W.2d at 398
    (quoting 
    Null, 836 N.W.2d at 75
    ).
    Juvenile offenders who choose to           participate in inherently
    dangerous felonies, whether they are the principal actor or aid and abet
    the felony, demonstrate a certain lack of maturity and impulse control that
    particularly implicates the penological goals of incapacitation and
    rehabilitation. “Nothing that the Supreme Court has said” or that we have
    said “suggests trial courts are not to consider protecting public safety in
    appropriate cases through imposition of significant prison terms.” 
    Null, 836 N.W.2d at 75
    . Harrison is claiming that juveniles have uncontrollable
    impulses due to their youth that limit their ability to appreciate the gravity
    of their participation in an inherently dangerous felony.       Importantly,
    sentencing juvenile offenders in his position to life imprisonment with the
    possibility of immediate parole takes this into account by allowing the
    parole board to examine maturity and rehabilitation and provides such
    offenders with a meaningful opportunity for release as soon as they meet
    these goals.
    Overall, “the legislature is in the best position to identify and adopt
    legal protections that advance our constitutional recognition that ‘children
    are different.’ ” 
    Zarate, 908 N.W.2d at 851
    (quoting 
    Roby, 897 N.W.2d at 144
    ). The legislature sought to prescribe “the most severe sentences for
    33
    [juvenile] offenders convicted of murder in the first degree,” including those
    juveniles convicted under the felony-murder rule. 
    Louisell, 865 N.W.2d at 600
    . We are not in a position to undermine those goals given that the
    challenged sentencing practice aligns with our juvenile sentencing
    jurisprudence by promoting legitimate penological goals and providing
    juvenile offenders like Harrison with “a ‘meaningful opportunity to obtain
    release based on demonstrated maturity and rehabilitation.’ ” 
    Id. at 602
    (quoting 
    Graham, 560 U.S. at 75
    , 130 S. Ct. at 2030). Therefore, we hold
    that sentencing juvenile offenders convicted of felony murder—whether
    they were the principal actor or aided and abetted—to life imprisonment
    with immediate parole eligibility is constitutional under both the Iowa
    Constitution and the United States Constitution.
    2. As-applied challenge.      Harrison argues his sentence of life
    imprisonment with the immediate possibility of parole is unconstitutional
    as applied to him because it is grossly disproportionate to his ultimate
    culpability. The Iowa and United States Constitutions both prohibit cruel
    and unusual punishment. See U.S. Const. amend. VIII; Iowa Const. art.
    I, § 17. This prohibition “embraces a bedrock rule of law that punishment
    should fit the crime.” 
    Bruegger, 773 N.W.2d at 872
    .
    We use a three-prong test to determine whether a sentence is grossly
    disproportionate under the Iowa and United States Constitutions. First,
    we   examine    “whether    the   sentence    being   reviewed   is   ‘grossly
    disproportionate’ to the underlying crime,” which “involves a balancing of
    the gravity of the crime against the severity of the sentence.” 
    Id. at 873.
    This is the threshold question, and we do not inquire any further if the
    challenged sentence does not appear grossly disproportionate based on
    this balancing. 
    Oliver, 812 N.W.2d at 650
    . If the threshold is met, we then
    engage in the second step of our analysis in which we partake in an
    34
    intrajurisdictional analysis, comparing the challenged sentence to
    sentences of other crimes in our jurisdiction. 
    Bruegger, 773 N.W.2d at 873
    .   Finally, we perform an interjurisdictional review, surveying the
    sentences for similar crimes in other jurisdictions. 
    Id. As we
    engage in this three-part inquiry, we must keep in mind
    certain general principles that help guide our determination of whether the
    challenged sentence is grossly disproportionate. “The first is that we owe
    substantial deference to the penalties the legislature has established for
    various crimes.” 
    Oliver, 812 N.W.2d at 650
    . Second, though we provide a
    more    demanding     review   of   a    defendant’s     sentence    for   gross
    disproportionality under the Iowa Constitution than available under the
    United States Constitution, “it is rare that a sentence will be so grossly
    disproportionate to the crime as to satisfy the threshold inquiry and
    warrant further review.” 
    Id. Third, “a
    recidivist offender is more culpable
    and thus more deserving of a longer sentence than a first-time offender.”
    
    Id. Finally, we
    analyze the facts of each case in reaching our threshold
    determination because they “can ‘converge to generate a high risk of
    potential gross disproportionality.’ ”       
    Id. at 651
    (quoting 
    Bruegger, 773 N.W.2d at 884
    ).
    For instance, in Bruegger, we held that the defendant’s twenty-five
    year prison sentence for statutory rape was susceptible to an as-applied
    constitutional challenge because the unique features of the case
    “converge[d] to generate a high risk of potential gross disproportionality—
    namely, a broadly framed crime, the permissible use of preteen juvenile
    adjudications as prior convictions to enhance the crime, and a dramatic
    sentence enhancement for repeat 
    offenders.” 773 N.W.2d at 868
    , 884. We
    vacated his sentence and remanded the case for a new sentencing hearing
    that considered the constitutionality of his sentence.              
    Id. at 886.
                                         35
    Meanwhile, we held a sentence of life in prison without the possibility of
    parole for a defendant’s second conviction of third-degree sexual abuse
    was not unconstitutional as applied to the defendant in 
    Oliver. 812 N.W.2d at 651
    –53.        In reaching this decision, we explained that the
    defendant’s sexual exploitation of a minor who was twenty years younger
    than him was precisely the kind of exploitation that third-degree sexual
    abuse “was designed to prevent, not conduct that was inadvertently
    caught by a broadly written statute.” 
    Id. at 651
    .
    Turning to the threshold inquiry, we cannot find that Harrison’s
    sentence of life imprisonment with immediate parole eligibility for felony
    murder is grossly disproportionate to the underlying crime. Unlike the
    defendant in Bruegger, who committed an act “of lesser culpability” that
    fell within the scope of “a broadly-framed statute,” felony murder does not
    encompass “acts of lesser culpability” since every felony murder requires
    a defendant’s participation in a forcible felony that directly leads to the
    killing of the victim.     
    Bruegger, 773 N.W.2d at 884
    ; see Iowa Code
    § 707.2(1)(b). Harrison directly participated in a forcible felony as an aider
    and abettor, which directly led to the death of Aaron McHenry. His actions
    of luring the victim to Collins and physically shoving the victim to help set
    up the “lick” that resulted in the murder of McHenry are exactly the type
    of actions the felony-murder rule is meant to encompass.             Though
    Harrison maintains he did not know ahead of time that Collins had a gun,
    Harrison was present when Collins shot McHenry, and he admitted he was
    in on the plan to rob McHenry. He was not an unknowing participant in
    the events that took place that day, and he showed no remorse during
    sentencing for his actions, simply declaring to the court, “[I]t’s just crazy
    how I can just be judged by people that don’t know what I’ve been through
    in my life.”   See State v. Knight, 
    701 N.W.2d 83
    , 88 (Iowa 2005) (“[A]
    36
    defendant’s lack of remorse is highly pertinent to evaluating his need for
    rehabilitation and his likelihood of reoffending.”).
    Moreover, his sentence does not involve “the permissible use of
    preteen juvenile adjudications as prior convictions to enhance the crime
    and a dramatic sentence enhancement for repeat offenders” like the
    defendant in Bruegger. See 
    Bruegger, 883 N.W.2d at 884
    . Harrison does
    not argue that he was denied an individualized sentencing as required
    under our juvenile sentencing jurisprudence.           Because Harrison is a
    juvenile offender, the district court was required to consider a number of
    mitigating circumstances, including his culpability, “[t]he nature of the
    offense,” “[t]he commission of the murder while participating in another
    felony,” and “[t]he circumstances of the murder including the extent of the
    defendant’s participation in the conduct and the way familial and peer
    pressure may have affected the defendant.” Iowa Code § 902.1(2)(b)(2)(e),
    (i), (s).   Based on the sentencing court’s assessment of Harrison’s
    participation in the felony murder, it sentenced him to the minimum
    possible sentence for first-degree murder.
    Further, the legislature’s decision to designate felony murder
    committed by either the principal or aider and abettor as first-degree
    murder reflects the seriousness of this offense. The legislature sought to
    prescribe “the most severe sentences for [juvenile] offenders convicted of
    murder in the first degree,” including those juveniles convicted under the
    felony-murder rule. 
    Louisell, 865 N.W.2d at 600
    . “[W]e owe substantial
    deference to the penalties the legislature has established for various
    crimes.”    
    Oliver, 812 N.W.2d at 650
    .      This conviction for first-degree
    murder, as an aider or abettor under a felony-murder theory, is not the
    rare case in which the unique features of the case “can ‘converge to
    37
    generate a high risk of potential gross disproportionality.’ ” 
    Id. at 651
    (quoting 
    Bruegger, 773 N.W.2d at 884
    ).
    Finally, Harrison’s argument that his sentence denies him of a
    meaningful opportunity for parole since “the ability of parole appears to be
    a legal fiction more than real opportunity” is not ripe for adjudication. We
    rejected similar arguments in both Louisell and Zarate since neither of
    those defendants had actually been denied parole in order to claim a legal
    violation. See 
    Zarate, 908 N.W.2d at 847
    ; 
    Louisell, 865 N.W.2d at 601
    –02.
    The same ripeness issue occurs in this case since Harrison’s claim is
    merely speculative. He has yet to appear before the parole board, and he
    does not provide any “basis for us to conclude that the parole board will
    fail to follow the law in a case that is presented to it, including his own.”
    
    Zarate, 908 N.W.2d at 848
    .
    In conclusion, life imprisonment with immediate parole eligibility for
    aiding and abetting in felony murder is not grossly disproportionate to the
    seriousness of the offense given the fatal harm Harrison helped enact on
    the life of another.   Nevertheless, even if it were, Harrison’s argument
    would fail under our intrajurisdictional and interjurisdictional analyses
    since he received the most lenient punishment given to offenders convicted
    of felony murder. See Iowa Code § 707.2; 
    id. § 902.1.
    Likewise, as we
    have noted previously, there is no national consensus against sentencing
    juvenile offenders convicted of felony murder—as the principal actor or
    aider and abettor—to life imprisonment with immediate parole eligibility.
    Therefore, Harrison’s sentence of life imprisonment with immediate parole
    eligibility does not constitute cruel and unusual punishment, either
    categorically or as applied to Harrison.
    D. Jury Instructions Regarding Robbery and the Felony-Murder
    Rule. Harrison argues the jury instructions did not properly inform the
    38
    jury on the types of assault required to establish a felonious robbery. The
    jury was provided the following definitional instruction of robbery:
    A person commits a robbery when, having the specific intent
    to commit a theft, the person commits an assault to assist or
    further the commission of the intended theft or the person’s
    escape from the scene thereof with or without the stolen
    property.
    The jury instructions also informed the jury on the definition of assault
    through the standard model instruction for a simple misdemeanor
    assault. 10 In 2016, approximately two years after Harrison committed the
    robbery at issue, Iowa Code section 711.3A went into effect. This Code
    section codified third-degree robbery—a misdemeanor that could not serve
    as a predicate for felony murder.                See [Iowa Code § 711.3A (2017)].
    Harrison now argues this change in the Code should be applied to him
    retroactively and the jury should have been instructed on the types of
    assault that would constitute forcible felony robbery.
    Iowa Code section 4.13(1) provides that “[t]he reenactment, revision,
    amendment, or repeal of a statute does not affect . . . the prior operation
    of the statute or any prior action taken under the statute.” Iowa Code
    § 4.13(1)(a). Section 4.13 “does not require that the characterization of
    the crime of which [the defendant] is convicted be changed.”                     State v.
    Chrisman, 
    514 N.W.2d 57
    , 63 (Iowa 1994). It is a well-settled law that
    10Jury   Instruction No. 28 defined “assault”:
    An assault is committed when a person does an act which is intended to
    either:
    1. cause pain or injury to another person; or
    2. result in physical contact which will be insulting or offensive to
    another person; or
    3. place another person in fear of immediate physical contact
    which will be painful, injurious, insulting or offensive to the other
    person when coupled with apparent ability to do the act.
    39
    substantive amendments to criminal statutes do not apply retroactively.
    See, e.g., Nguyen v. State, 
    878 N.W.2d 744
    , 754–56 (Iowa 2016) (holding
    both the Iowa and Federal Constitutions only require “retroactive
    application of clarifications to existing substantive law, not changes to
    substantive law”); Dindinger v. Allsteel, Inc., 
    860 N.W.2d 557
    , 563 (Iowa
    2015) (“It is well established that a statute is presumed to be prospective
    only unless expressly made retrospective.” (quoting Anderson Fin. Servs.,
    LLC v. Miller, 
    769 N.W.2d 575
    , 578 (Iowa 2009)).       Since third-degree
    robbery did not exist in the Iowa Code at the time of Harrison’s offense,
    Harrison was not entitled to a jury instruction differentiating between
    felony robbery and misdemeanor robbery.
    E. Ineffective-Assistance Claims. Harrison presents a number of
    ineffective-assistance-of-counsel claims.   Criminal defendants have the
    right to effective assistance of counsel under both the Iowa Constitution
    and the United States Constitution. U.S. Const. amend. VI; Iowa Const.
    art. I, § 10. “Generally, claims of ineffective assistance of counsel are
    preserved for postconviction relief proceedings.” State v. Soboroff, 
    798 N.W.2d 1
    , 8 (Iowa 2011). Preserving these claims for postconviction relief
    allows the parties to develop an adequate record of the claims and provides
    the attorney charged with ineffective assistance with the “opportunity to
    respond to defendant’s claims.” 
    Id. However, if
    “the record is adequate,
    we may resolve the claim on direct appeal.” 
    Id. To prove
    ineffective assistance of counsel, the defendant must show
    “by a preponderance of the evidence both that counsel failed an essential
    duty and that the failure resulted in prejudice.” 
    Schlitter, 881 N.W.2d at 388
    . Since the defendant must show both prongs of this test have been
    met, we need not address the second prong regarding prejudice if the
    defendant fails to establish the first prong. 
    Nguyen, 878 N.W.2d at 754
    .
    40
    Crafting a trial strategy is inherently difficult, so we “must indulge a strong
    presumption that counsel’s conduct falls within the wide range of
    reasonable professional assistance; that is, the defendant must overcome
    the presumption that, under the circumstances, the challenged action
    ‘might be considered sound trial strategy.’ ” 
    Id. at 752
    (quoting Strickland
    v. Washington, 
    466 U.S. 668
    , 689, 
    104 S. Ct. 2052
    , 2065 (1984)).            In
    accordance with this presumption, counsel fails his or her essential duty
    by “perform[ing] below the standard demanded of a reasonably competent
    attorney.” Ledezma v. State, 
    626 N.W.2d 134
    , 142 (Iowa 2001).
    Further, prejudice results from counsel’s failure to perform an
    essential duty when “there is a reasonable probability that, but for
    counsel’s unprofessional errors, the result of the proceeding would have
    been different.” 
    Id. at 143
    (quoting 
    Strickland, 466 U.S. at 694
    , 104 S. Ct.
    at 2068). “A reasonable probability is a probability sufficient to undermine
    confidence in the outcome.” Id. (quoting 
    Strickland, 466 U.S. at 694
    , 104
    S. Ct. at 2068). To meet this standard, the defendant must show that,
    “absent the errors, the fact finder would have had a reasonable doubt
    respecting guilt.” 
    Id. (quoting Strickland,
    466 U.S. at 
    695, 104 S. Ct. at 2068
    ).
    1. Challenge to the use of felony robbery as a predicate felony. This
    claim of ineffective assistance involves the jury instructions utilized by the
    district court. Therefore, the record is adequate to resolve this claim on
    direct appeal.    See 
    Soboroff, 798 N.W.2d at 8
    .          The relevant jury
    instructions at issue are as follows:
    [a] person commits robbery when, having the specific intent
    to commit a theft, the person commits an assault to assist or
    further the commission of the intended theft or the person’s
    escape from the scene thereof with or without the stolen
    property.
    ....
    41
    An assault is committed when a person does an act which is
    intended to either: 1. Cause pain or injury to another person;
    or 2. Result in physical contact which will be insulting or
    offensive to another person; or 3. Place another person in fear
    of immediate physical contact which will be painful, injurious,
    insulting or offensive to the other person when coupled with
    the apparent ability to do the act.
    “Under the merger doctrine, a person is only guilty of felony murder
    if the act resulting in the predicate felony is independent of the act
    resulting in death.” Tribble, 
    790 N.W.2d 128
    . We have never extended the
    merger doctrine to hold that felony robbery cannot serve as the predicate
    felony for felony-murder purposes. Nonetheless, Harrison claims his trial
    counsel was ineffective by failing to request jury instructions requiring the
    State to prove the felony robbery was an independent act from the murder.
    Harrison reasons the merger doctrine should apply to his case because his
    actions that caused the robbery were the same actions that caused the
    victim’s death. Thus, to determine whether Harrison’s attorney failed an
    essential duty by declining to request jury instructions on the merger
    doctrine, we must examine the validity of Harrison’s merger argument.
    Harrison premises his argument largely on our holding in Heemstra,
    in which the defendant was convicted of first-degree murder under a
    general verdict after the defendant shot and killed the victim during the
    course of an 
    argument. 721 N.W.2d at 551
    . In that case, the district court
    instructed the jury on both premeditated murder and felony murder,
    informing the jury that it was required to find either that “[t]he defendant
    acted willfully, deliberately, premeditatedly, and with specific intent to kill”
    the victim, or that the defendant participated in the felony of willful injury
    as the predicate felony to murder. 
    Id. at 552–53.
    On appeal, we held, “if
    the act causing willful injury is the same act that causes the victim’s death,
    the former is merged into the murder and therefore cannot serve as the
    42
    predicate felony for felony-murder purposes.” 
    Id. at 558.
    Consequently,
    the law requires the State to prove that felony assault was a separate act
    from the murder if felony assault is the predicate felony to murder given
    that “[d]eath is obviously a bodily injury.” 
    Id. at 555,
    558 (quoting 4 Robert
    R. Rigg, Iowa Practice Criminal Law (1) § 3:16 (2006)). “Otherwise, all
    assaults that immediately precede a killing would bootstrap the killing into
    first-degree murder, and all distinctions between first-degree and second-
    degree murder would be eliminated.” 
    Id. at 557.
    Because the defendant’s
    act of shooting the victim in Heemstra was both the act causing willful
    injury and the cause of the victim’s death, we held the felony of willful
    injury merged into the murder and could not serve as the predicate felony
    for his felony-murder charge. See 
    id. at 558.
    In reaching this conclusion, we relied in part on a similar case from
    New York, People v. Moran, 
    158 N.E. 35
    (N.Y. 1927), which held that the
    predicate felony in a felony murder case must be independent of the
    assault that caused the victim’s death. 
    Heemstra, 721 N.W.2d at 557
    –58.
    To explain the merger doctrine, we specifically quoted the portion of Moran
    that stated, “The felony that eliminates the quality of the intent must be
    one that is independent of the homicide and of the assault merged therein,
    as, e.g., robbery or larceny or burglary or rape.” 
    Id. at 558
    (emphasis
    added) (quoting 
    Moran, 158 N.E. at 36
    ).
    Since Heemstra, we have considered similar felony-murder cases
    predicated on the forcible felony of felonious assault. In State v. Millbrook,
    we held “the fact that intimidation with a dangerous weapon is not a
    lesser-included   offense   of   first-degree   murder   does   not   preclude
    application of the merger doctrine enunciated in Heemstra.” 
    788 N.W.2d 647
    , 652 (Iowa 2010). Nevertheless, we upheld the defendant’s conviction
    because his act of aiding and abetting a codefendant in the commission of
    43
    intimidation with a dangerous weapon with intent was sufficiently
    independent of his own firing of the gun into the crowd that caused the
    victim’s death.   
    Id. at 652–54.
         Likewise, we examined our merger
    jurisprudence in Tribble, upholding a felony-murder conviction based on
    the felonious assault of willful injury due to the substantial evidence
    demonstrating the act of willful injury was sufficiently separate from the
    act of killing. 
    Tribble, 790 N.W.2d at 128
    –29.
    All of these cases dealt with the merger doctrine in relation to the
    forcible felony of assault, and none of them discussed extending the
    merger doctrine to cases that involve felony robbery as the predicate for
    felony murder.    We even quoted other authorities in Heemstra that
    specifically stated the act of robbery was sufficiently independent from the
    act of killing to preclude it from being merged into the murder.        See
    
    Heemstra, 721 N.W.2d at 556
    (“Although rape, arson, robbery and
    burglary are sufficiently independent of the homicide, . . . aggravated
    battery toward the deceased will not do for felony murder.” (quoting
    Commonwealth v. Quigley, 
    462 N.E.2d 92
    , 95 (Mass. 1984))); see also 
    id. at 558
    (“The felony that eliminates the quality of the intent must be one
    that is independent of the homicide and of the assault merged therein, as,
    e.g., robbery or larceny or burglary or rape.” (quoting 
    Moran, 158 N.E. at 36
    )). This is because robbery is clearly distinguishable from assault for
    the purpose of the merger doctrine.
    Unlike the felonious assault at issue in Heemstra, felony robbery is
    not merely a less serious version of murder from which every felonious
    robbery ending in death could automatically be elevated to first-degree
    murder in the same way felonious assault could “bootstrap the killing into
    first-degree murder.”   
    Heemstra, 721 N.W.2d at 557
    .         Rather, felony
    robbery is a distinct crime that necessitates the showing of a different
    44
    intent from the killing. Under Iowa Code section 711.1(1), robbery requires
    a showing that the defendant had the “intent to commit a theft” and that
    the defendant committed an assault “to assist or further the commission
    of the intended theft or the person’s escape from the scene thereof.” Iowa
    Code § 711.1(1). Therefore, the concern that, absent the merger doctrine,
    all felony robberies “that immediately precede a killing would bootstrap
    the killing into first-degree murder, and all distinctions between first-
    degree and second-degree murder would be eliminated” is not implicated
    here as it was with felonious assaults in Heemstra. 
    Heemstra, 721 N.W.2d at 557
    . Moreover, robbery—unlike willful injury—is expressly listed as a
    forcible felony under section 702.11(1) to qualify as a basis for felony
    murder.     See Iowa Code § 702.11(1).         Based on the fundamental
    differences between felony robbery and felony assault in the felony-murder
    context, in addition to the merger rule jurisprudence in Iowa, it can hardly
    be said that trial counsel in this case “performed below the standard
    demanded of a reasonably competent attorney.” 
    Ledezma, 626 N.W.2d at 142
    .
    2. Evidentiary and testimonial objections. Harrison also maintains
    his trial counsel was ineffective in failing to challenge certain testimony
    and evidence presented at trial. Harrison asserts that his trial counsel
    should have objected to testimony and evidence presented at his trial
    regarding his codefendant’s conviction for first-degree murder in the death
    of McHenry. Harrison also challenges trial counsel’s decision not to object
    to certain testimony from Detective Youngblut. Harrison challenges trial
    counsel’s decision to allow the testimony of Shirley Dick from Collins’s trial
    to be read into the record since Dick passed away before Harrison’s trial.
    Finally, Harrison argues his trial counsel was ineffective in failing to object
    to the playing of Dick’s 911 call for the jury.      However, the record is
    45
    inadequate for us to address these claims. Like most claims of ineffective
    assistance of counsel, we preserve these claims for postconviction-relief
    proceedings “so an adequate record of the claim can be developed and the
    attorney charged with providing ineffective assistance may have an
    opportunity to respond to defendant’s claims.” 
    Soboroff, 798 N.W.2d at 8
    .
    IV. Conclusion.
    For the aforementioned reasons, we affirm the conviction and
    sentence for Harrison and preserve the additional claims of ineffective
    assistance of counsel for postconviction-relief proceedings.
    AFFIRMED.
    All justices concur except Wiggins, and Appel, JJ., who dissent, and
    Hecht, J., who takes no part.
    46
    #16–1998, State v. Harrison
    APPEL, Justice (dissenting).
    The question in this case is whether an unarmed child may be
    subject to life in prison with the possibility of parole for participating in a
    marijuana robbery where a coparticipant brought a gun to the crime and
    killed the robbery victim.
    I. History of Felony Murder.
    The origin of the felony-murder rule lies in the shadows of the past.
    Scholars have speculated that it arose because of a mistake made by Lord
    Coke in summarizing the legal texts of Lord Bracton when he substituted
    the word murder for homicide in describing death arising out of unlawful
    conduct. See Leonard Birdsong, Felony Murder: A Historical Perspective
    by Which to Understand Today’s Modern Felony Murder Rule Statutes, 32
    T. Marshall L. Rev. 1, 8–9 (2006) [hereinafter Birdsong]; see also James J.
    Tomkovicz, The Endurance of the Felony-Murder Rule: A Study of the Forces
    That Shape Our Criminal Law, 51 Wash. & Lee L. Rev. 1429, 1442 (1994)
    [hereinafter Tomkovicz] (citing the Lord Coke theory along with other
    possible origins of the felony-murder rule).
    In any event, the felony-murder rule was controversial in its country
    of origin. See Guyora Binder, The Origins of American Felony Murder Rules,
    57 Stan. L. Rev. 59, 101–02 (2004) (noting “learned opinions did not
    support felony murder rule unanimously”); Birdsong, 32 T. Marshall L.
    Rev. at 15 (“Some of the earliest reported jury instructions on the felony
    murder rule allude to its unpopularity, and seem to invite the jury to ignore
    it.”); Rudolph J. Gerber, The Felony Murder Rule: Conundrum Without
    Principle, 31 Ariz. St. L.J. 763, 766 (1999) [hereinafter Gerber] (“The felony
    murder rule has an extensive history of thoughtful condemnation from at
    least 1834.”). As a matter of practice, the felony-murder rule appears to
    47
    have been rarely used in England, and when it was, many cases tended to
    limit its scope by requiring that the defendant participate in an act of
    violence during the perpetration of the felony or that the killing involved
    must be a natural and probable consequence of the felon’s actions. See
    Binder, 57 Stan. L. Rev. at 100–03. Yet, the vestiges of the felony-murder
    rule persisted in theory in England until 1957, when the felony-murder
    rule was abolished. Birdsong, 32 T. Marshall L. Rev. at 16.
    The felony-murder rule took hold in America in the early years of the
    Republic. In 1794, Pennsylvania passed a statute that at least indirectly
    embraced felony murder.       
    Id. at 17–18.
      The vast majority of states
    eventually followed suit. 
    Id. at 18.
    The felony-murder rule has been subject to extensive criticism. See
    generally Gerber, 31 Ariz. St. L.J. at 766–67, 770 (noting the rule suffers
    from at least four problems, each alone “fatal to a claim of principled
    justice”); Nelson E. Roth & Scott E. Sundby, The Felony-Murder Rule: A
    Doctrine at Constitutional Crossroads, 70 Cornell L. Rev. 446, 491–92
    (1985) [hereinafter Roth & Sundby]; Joseph Trigilio & Tracy Casadio,
    Executing Those Who Do Not Kill: A Categorical Approach to Proportional
    Sentencing, 48 Am. Crim. L. Rev. 1371, 1408–11 (2011). The thrust of the
    criticism generally is that moral culpability is at the heart of criminal
    justice and that for harsh criminal sanctions to be imposed, the
    perpetrator must manifest the intent, or mens rea, to commit the crime.
    See Gerber, 31 Ariz. St. L.J. at 770–72.
    The felony-murder rule has traditionally been defended on two
    grounds. First, it is said that the felony-murder rule embraces a theory of
    transferred intent, namely, that the intent of the cofelon who kills the
    victim during the course of a felony is transferred to others who participate
    in the crime. See Steven R. Morrison, Defending Vicarious Felony Murder,
    48
    47 Tex. Tech L. Rev. 129, 130, 138, 149 (2014). Under this theory, the
    traditional mens rea requirement of criminal law is satisfied. The problem
    with the transferred-intent theory is that it does not comport with facts on
    the ground. A cofelon may be shocked that his colleague in crime brought
    a gun, or a knife, to what the cofelon thought would be a petty crime.
    The second theory is that the legislature in enacting a felony-murder
    rule has determined that mens rea is not required to support a conviction.
    See Kevin Cole, Killings During Crime: Toward a Discriminating Theory of
    Strict Liability, 28 Am. Crim. L. Rev. 73, 77, 98 n.82 (1990) [hereinafter
    Cole]. This theory seems more honest, but it amounts to a frontal assault
    on the traditional notion of criminal justice that a mens rea element is
    essential before the state imposes severe criminal sanctions. See John G.
    Malcolm, Morally Innocent, Legally Guilty: The Case for Mens Rea Reform,
    18 Federalist Soc’y Rev. 40, 40–41 (2017).
    Aside from legal theory, the felony-murder rule has been defended
    on a number of policy grounds. The rule is defended on the ground that
    it deters unlawful conduct that leads to the death. See David Crump &
    Susan Waite Crump, In Defense of the Felony Murder Doctrine, 8 Harv. J. L.
    & Pub. Pol’y 359, 369–71 (1985).       It is also defended on grounds of
    retributive justice. See Cole, 28 Am. Crim. L. Rev. at 74–78, 121–32.
    While the felony-murder rule has been adopted in most American
    jurisdictions, there has been a trend to limit its scope. Roth & Sundby,
    70 Cornell L. Rev. at 446. The scope of felony murder has been limited
    through a number of techniques, including limiting the crimes from which
    felony murder may arise, imposing a requirement of proximate cause,
    requiring some showing of mens rea such as reckless indifference to
    human life, and adopting an affirmative defense where the cofelon did not
    participate in the killing in any meaningful way, was not armed with a
    49
    dangerous weapon, and had no reason to believe that the other participant
    intended to engage in conduct likely to result in death or physical injury.
    
    Id. at 446
    & nn.7–8. As noted by one court, “the felony murder doctrine
    expresses a highly artificial concept that deserves no extension beyond its
    required application.” People v. Phillips, 
    414 P.2d 353
    , 360 (Cal. 1966) (en
    banc), overruled on other grounds by People v. Flood, 
    957 P.2d 869
    , 882
    n.12 (Cal. 1998).
    The limitations of felony murder adopted in some jurisdictions have
    not satisfied critics.   When the Model Penal Code was promulgated in
    1962, it sharply criticized the felony-murder rule as inconsistent with
    traditional notions of criminal culpability. According to the commentary,
    “Principled argument in favor of the felony-murder doctrine is hard to
    find.” Model Penal Code § 210.2 cmt. 6, at 37 (Am. Law Inst. 1980).
    Academic commentators have continued to attack the felony-
    murder rule. The parade of negative commentary is long and winding. See
    Gerber, 31 Ariz. St. L.J. at 766 (“The felony murder rule has an extensive
    history of thoughtful condemnation.”); John Calvin Jeffries Jr. & Paul B.
    Stephan III, Defenses, Presumptions, and Burdens of Proof in the Criminal
    Law, 88 Yale L.J. 1325, 1387 (1979) (citing “at least fifty years of sustained
    academic and judicial hostility” to the felony-murder rule); Jeanne Hall
    Seibold, The Felony-Murder Rule: In Search of a Viable Doctrine, 23 Cath.
    Law. 133, 160 (1978) (“The concept of basing the degree of punishment on
    the seriousness of the result of the criminal act seems grossly misplaced
    in a legal system which recognizes the degree of mental culpability as the
    appropriate standard for fixing criminal liability.”); Tomkovicz, 51 Wash.
    & Lee L. Rev. at 1460–65 (noting that despite constant attack on the
    felony-murder rule, legislators feel pressures to placate a populace that
    does not care about treating felons fairly).
    50
    Yet, in most jurisdictions, some form of felony murder remains on
    the books.       Kentucky, Hawaii, and Ohio have abolished it through
    legislative action. See People v. Aaron, 
    299 N.W.2d 304
    , 314 & nn.57–58
    (Mich. 1980) (citing the Kentucky and Hawaii statutes); Turk v. State, 
    194 N.E. 425
    , 426 (Ohio Ct. App. 1934) (noting that the common law felony-
    murder rule is not the law in Ohio and citing Ohio statute that the state
    must show “purpose and intent to kill” for murder), aff'd, 
    194 N.E. 453
    (Ohio 1935) (per curiam). In Michigan, the felony-murder rule has been
    substantially transformed by judicial ruling, if not eliminated. See 
    Aaron, 299 N.W.2d at 325
    –26.
    No one, of course, contends that participants in felonies are not
    deserving of punishment.           A person who knowingly participates in a
    robbery has the necessary mens rea for a robbery and may be convicted
    and sentenced for that crime. In some cases, the participant may also
    have the necessary mens rea for a more serious offense, including
    involuntary manslaughter and even murder.                   What the critics insist,
    however, is that the traditional element of mens rea must accompany any
    such convictions with serious penological consequences.
    II. Background of Felony Murder in Iowa.
    Iowa’s current felony-murder statute was passed as part of the
    criminal code revisions adopted by the Iowa General Assembly in 1976 and
    made effective in 1978. 1976 Iowa Acts ch. 1245, ch. 1, § 702 (codified at
    Iowa Code § 707.2 (1979)). 11 The new statutory provision stated that “A
    person commits murder in the first degree when he or she commits murder
    under any of the following circumstances . . . [t]he person kills another
    person while participating in a forcible felony.” Iowa Code § 707.2(2). The
    11Priorto the modern version of the statute, Iowa’s felony murder rule was codified
    at Iowa Code section 690.2 (1977).
    51
    statute further provided a list of crimes that were “forcible felonies,”
    including, among other offenses, robbery.      
    Id. § 702.11;
    see generally
    Douglas Van Zanten, Note, Felony Murder, the Merger Limitation, and
    Legislative Intent in State v. Heemstra: Deciphering the Proper Role of the
    Iowa Supreme Court in Interpreting Iowa’s Felony-Murder Statute, 
    93 Iowa L
    . Rev. 1565, 1576–84 (2008).
    In an early case decided shortly after the current felony-murder
    statute was enacted, we considered whether a showing of malice
    aforethought for murder was required under the statute.        See State v.
    Galloway, 
    275 N.W.2d 736
    , 738 (Iowa 1979) (applying old version of felony-
    murder statute and noting recent Code changes did not alter the analysis),
    abrogated on other grounds by State v. Schutz, 
    579 N.W.2d 317
    , 320 (Iowa
    1998). We answered the question in the affirmative. 
    Id. In Galloway,
    the
    defendant objected to a jury instruction which did not require the
    prosecution to prove malice aforethought, but the court refused to add the
    requested language. 
    Id. The Galloway
    court reversed, noting “[m]alice
    aforethought is a necessary element for murder. . . . And murder must be
    committed in order to implement our felony-murder rule.” 
    Id. In light
    of
    Galloway, it appears that while the common law felony-murder rule
    requires only a killing, the Iowa statute requires a murder. See Iowa Code
    § 707.2(1)(b) (2015) (“A person commits murder in the first degree when
    the person commits murder under any of the following circumstances: . . .
    [t]he person kills another person while participating in a forcible felony.”
    (Emphasis added.)).
    Yet, the situation has become clouded by the manner in which we
    have allowed malice to be proven. In State v. Veverka, 
    271 N.W.2d 744
    ,
    747 (Iowa 1978), we held that required malice “may be implied from
    circumstances such as an intent to commit a felony from which death
    52
    results.” Although stated in permissive terms, an instruction providing
    that malice may be inferred from an intent to commit a felony from which
    death results sounds a lot like the common law rule, namely, that any
    killing can give rise to murder if it occurred in the course of a felony. See
    Kristy L. Albrecht, Note, Iowa’s Felony-Murder Statute: Eroding Malice and
    Rejecting the Merger Doctrine, 
    79 Iowa L
    . Rev. 941, 950 & n.71 (1994)
    [hereinafter Albrecht]. Thus, in State v. Taylor, 
    287 N.W.2d 576
    , 578 (Iowa
    1980), we again stated that malice may be shown by the commission of a
    felony, and in Schrier v. State, 
    347 N.W.2d 657
    , 666–67 (Iowa 1984), we
    held that counsel was not ineffective for failing to object to a felony-murder
    instruction that allowed the state to prove malice simply by proving an
    underlying felony. Under this approach, when the malice to support the
    murder element of Iowa’s felony-murder statute is not independent of the
    commission of a felony, the legislature’s limitation of felony murder to
    murders rather than mere killings does indeed ring “hollow.” Albrecht, 
    79 Iowa L
    . Rev. at 955.
    We considered questions related to the scope of felony murder in
    Conner v. State, 
    362 N.W.2d 449
    (Iowa 1985). In Conner, the defendant
    challenged his first-degree murder conviction under the Iowa felony-
    murder rule on the ground that by presuming malice was present, the
    statute violated due process under the United States Constitution. 
    Id. at 455.
    The defendant cited Sandstrom v. Montana, 
    442 U.S. 510
    , 
    99 S. Ct. 2450
    (1979), and its precursors for the proposition that a criminal statute
    violates due process if it imposes an irrebuttable presumption regarding
    facts necessary to support a conviction. 
    Conner, 362 N.W.2d at 455
    –56.
    In Conner, we departed from the transferred-intent model of
    analysis, which would have exposed the felony-murder rule to due process
    attack, and instead declared that elimination of the mens rea requirement
    53
    was not an irrebuttable presumption but instead “a matter of substantive
    law that places responsibility on a wrongdoer for the direct and indirect
    consequences of his joint criminal conduct with another.” 
    Id. at 456.
    We
    came to a similar conclusion in State v. Ragland, 
    420 N.W.2d 791
    , 794
    (Iowa 1988), overruled on other grounds by State v. Heemstra, 
    721 N.W.2d 549
    , 558 (Iowa 2006). Ragland and Conner involved claims under the
    United States Constitution only. 
    Ragland, 420 N.W.2d at 793
    ; 
    Conner, 362 N.W.2d at 455
    .
    A significant question under the new felony-murder statute was
    whether we would recognize the merger rule, namely, that an assault that
    resulted in a homicide merged and could not provide the predicate felony
    for felony murder. In State v. Beeman, we declined to recognize the merger
    doctrine under our felony-murder statute. 
    315 N.W.2d 770
    , 777 (Iowa
    1982), overruled by 
    Heemstra, 721 N.W.2d at 558
    . We noted that felonious
    assault was listed by the legislature as one of the predicate offenses that
    could give rise to the felony-murder rule. 
    Id. We therefore
    declined to
    adopt the merger rule. 
    Id. We reaffirmed
    the Beeman holding in a number
    of cases.   See State v. Anderson, 
    517 N.W.2d 208
    , 214 (Iowa 1994),
    overruled by 
    Heemstra, 721 N.W.2d at 558
    ; State v. Rhomberg, 
    516 N.W.2d 803
    , 805 (Iowa 1994), overruled by 
    Heemstra, 721 N.W.2d at 558
    ; 
    Ragland, 420 N.W.2d at 793
    .
    In Heemstra, we reconsidered the question of whether the felony of
    willful injury could be used as a predicate crime or whether willful injury
    merged with the resulting homicide to prevent application of the felony-
    murder 
    rule. 721 N.W.2d at 554
    . In Heemstra, we charted a new course.
    
    Id. We noted
    that felony murder was one of the most controversial
    doctrines in the field of criminal law. 
    Id. The Heemstra
    court noted that
    without the merger rule, the law could “test the outer constitutional
    54
    parameters of our felony-murder law.” 
    Id. at 555.
    We cited, among other
    things, a California case where the court had declared that refusing to
    recognize merger would extend the operation of the rule “beyond any
    rational function that it is designed to serve.” 
    Id. at 556
    (quoting People v.
    Ireland, 
    450 P.2d 580
    , 590 (Cal. 1969) (en banc)). The Heemstra court was
    determined not to create what one commentator had called “an ever-
    expanding felony murder rule.” 
    Id. at 558
    (quoting 4 Robert R. Rigg, Iowa
    Practice Criminal Law (I) § 3:16 (2006)).
    Even with the limitations, the felony-murder rule has produced
    some troublesome results. In Ragland, a child knowingly participated in
    a fight with a rival group of children. 
    836 N.W.2d 107
    , 110 (Iowa 2013).
    During the course of the ensuing fight, one of his compatriots struck a
    person on the head with a tire iron, causing death.          
    Id. The actual
    perpetrator of the crime plead guilty to second-degree murder and served
    a three-year prison sentence before being released. 
    Id. at 112.
    Ragland
    went to trial, was convicted of felony murder, and received a life sentence.
    
    Id. at 110.
    In a letter to the county attorney, the actual perpetrator asked,
    “How can it be that I, the person who is actually directly responsible for
    [the victim’s] death was given a second chance and am allowed to live freely
    in society, but Jeff Ragland is not?” 
    Id. at 112.
    III. Felony-Murder Cases in Other States.
    A. Introduction. There have been relatively few cases challenging
    the constitutionality of the felony-murder rule. The older cases generally,
    however, reject due process challenges. See, e.g., People v. Dillon, 
    668 P.2d 697
    , 718 (Cal. 1983) (en banc); State v. Nichols, 
    734 P.2d 170
    , 177 (Mont.
    1987); Cotton v. Commonwealth, 
    546 S.E.2d 241
    , 244 (Va. Ct. App. 2001).
    These cases tend to emphasize the ability of the legislature to define the
    crimes and then proceed to construe the scope of felony-murder statutes
    55
    as narrowly as possible. A narrow result may be powered by the desire to
    avoid due process constitutional infirmities that might result from broader
    interpretations of felony-murder statutes. See, e.g., State v. Ortega, 
    817 P.2d 1196
    , 1204 (N.M. 1991), abrogated on other grounds by Kersey v.
    Hatch, 
    237 P.3d 683
    , 689 (N.M. 2010).
    B. People v. Aaron. The first such case is Aaron, 
    299 N.W.2d 304
    .
    In this case, the Michigan Supreme Court, in a lengthy and highly
    footnoted opinion, considered the validity of the felony-murder rule in
    Michigan. 
    Id. at 324.
    The Aaron court abrogated felony murder in that
    state.    
    Id. at 326.
      Although the case does not directly deal with a
    constitutional challenge to a state statute, the approach of Aaron to the
    felony-murder rule is instructive on potential constitutional issues.
    The Aaron court first surveyed caselaw and legislative developments
    regarding the felony-murder rule. 
    Id. at 312–16.
    The court noted that the
    wisdom of the felony-murder rule had long been questioned, citing a
    Pennsylvania court’s declaration stating “how shaky are the basic
    premises on which (the felony murder rule) rests” and a California decision
    characterizing the felony murder doctrine as expressing “a highly artificial
    concept.”      
    Id. at 313–14
    (first quoting Commonwealth ex rel. Smith v.
    Myers, 
    261 A.2d 550
    , 555 (Pa. 1970); and then quoting 
    Phillips, 414 P.2d at 360
    ). The Aaron court cited numerous limitations placed on the felony-
    murder rule by courts and by legislatures. 
    Id. at 314–16.
    The Aaron court next focused its discussion on the issue of moral
    culpability.    
    Id. at 316–17.
      Citing authorities for the proposition that
    culpability represents a basic principle of criminal law, the court observed
    that     the   felony-murder   rule   “completely   ignores   the   concept   of
    determination of guilt on the basis of individual misconduct.” 
    Id. With respect
    to first-degree murder, the court noted that while murder
    56
    ordinarily requires “a showing of premeditation, deliberation and
    willfulness,” felony murder “only requires a showing of intent to do the
    underlying felony.” 
    Id. at 317.
    The Aaron court noted academic authorities that had condemned
    the felony-murder rule. See 
    id. The court
    favorable cited a commentator
    who declared that “the felony-murder doctrine gives rise to what can only
    be described as an emotional reaction, not one based on logical and
    abstract principles.” 
    Id. (quoting Note,
    Recent Extensions of Felony Murder
    Rule, 31 Ind. L.J. 534, 543 (1956)). The court further cited a treatise that
    noted in 1771 it was observed that the felony-murder doctrine “is surely
    repugnant to that noble, and active confidence, which a free people ought
    to possess in the laws of their constitution, the rule of their actions.” 
    Id. at 318
    (quoting Jerome Hall, General Principles of Criminal Law 455
    (1947)).
    In the end, the Aaron court held that malice is an essential part of
    any murder, whether it occurred in the course of a felony or otherwise. 
    Id. at 319.
       The court emphasized that the necessary malice, in the
    appropriate case, might be inferred from the circumstances of the crime.
    
    Id. at 327.
    The issue of malice, however, is for the jury, which “may not
    find malice from the intent to commit the underlying felony alone.” 
    Id. C. State
    v. Ortega. A second case of interest is Ortega, 
    817 P.2d 1196
    . The felony murder statute in New Mexico at the time was quite
    broad, triggered by any killing that occurred in the course of any felony.
    
    Id. at 1202.
      The New Mexico Supreme Court interpreted the statute,
    however, to require that the defendant “intended to kill (or had the state
    of mind otherwise generally associated with mens rea).” 
    Id. at 1204.
    The
    Ortega court concluded that “proof that a killing occurred during the
    commission or attempted commission of a felony will no longer suffice to
    57
    establish murder in the first degree” under the felony-murder rule. 
    Id. at 1205.
       Instead, according to the court, the state must show that the
    defendant had the mens rea sufficient to support second-degree murder,
    which then could be elevated to first-degree murder when a felony is
    involved. 
    Id. The Ortega
    decision was based on three propositions. 
    Id. at 1204.
    First, the Ortega court emphasized that in Anglo-American law, serious
    nonregulatory crimes require criminal intent.     
    Id. Second, if
    criminal
    intent is supplied merely by participation in a felony, the “one runs
    headlong into Sandstrom.” 
    Id. Third, the
    Ortega court found its approach
    most consistent with the structure of the homicide provisions of New
    Mexico law. 
    Id. at 1206.
    D. Lowry v. State. The third case is Lowry v. State, 
    657 S.E.2d 760
    (S.C. 2008). In Lowry, the South Carolina Supreme Court considered
    the constitutionality of jury instructions related to felony murder. 
    Id. at 763.
    The challenged instruction stated felony murder arose if “a person
    kills another in the doing or attempting to do an act which is considered a
    felony.” 
    Id. at 762.
    The Lowry court held the trial court’s supplemental
    jury charge created a mandatory presumption of the malice element and
    violated the defendant’s due process rights. 
    Id. at 764.
    E. People v. Dillon. The fourth case worthy of note is Dillon, 
    668 P.2d 697
    . In Dillon, a seventeen-year-old boy was convicted of first-degree
    murder under California’s felony-murder rule arising from an attempted
    robbery. 
    Id. at 700.
    The defendant and others scouted a small marijuana
    farm on two prior occasions, only to be chased off by an owner armed with
    a shotgun. 
    Id. A larger
    group engaged in a third foray, this time armed
    with various weapons including shotguns and a .22 caliber semi-
    automatic rifle possessed by Dillon. 
    Id. at 701.
    They also brought various
    58
    equipment for harvesting the marijuana. 
    Id. Some of
    the party left the
    scene after a couple of hours, but Dillon and his companion remained. 
    Id. When the
    owner emerged in close proximity with his shotgun pointed
    outwards, Dillon shot him nine times with his rifle. 
    Id. at 701,
    723.
    In Dillon, the child took the stand and described his state of mind,
    from youthful bravado to sheer panic as events unfolded. 
    Id. at 722–23.
    With respect to the shooting, Dillon testified, “I just pressed the trigger, I
    was so scared . . . . I just kept squeezing it, and shots just went off.” 
    Id. at 723.
    A clinical psychologist testified regarding Dillon’s immaturity, poor
    judgment and planning, and found him acting as a much younger child.
    
    Id. The psychologist
    testified that Dillon, when confronted with the armed
    owner, probably “ ‘blocked out’ the reality of the situation and reacted
    reflexively, without thinking at all.” 
    Id. The jury
    seems to have credited the child’s testimony. See 
    id. at 724.
    At the close of evidence, the jury sent the judge a note asking what
    the purpose of the psychologist’s testimony was. 
    Id. at 723.
    The court
    simply responded by directing the jury to follow the instructions.         
    Id. During deliberations,
    the jury sent the judge a note asking whether it could
    convict the defendant of second-degree murder rather than first-degree
    murder. 
    Id. at 724.
    The judge reread the instruction and further declared
    that if the defendant was guilty of felony murder, it must be murder in the
    first degree. 
    Id. The jury
    convicted the defendant of attempted robbery
    and first-degree murder. 
    Id. The court
    advised the jury when discharging it that “[t]his felony
    murder rule is a very harsh rule and it operated very harshly in this case.”
    
    Id. Yet, the
    court advised the jury that the court had an option of
    committing the defendant to the Youth Authority rather than sending him
    to prison. 
    Id. The judge
    invited the jury to provide whatever observations
    59
    they might care to make about ultimate disposition of the case. 
    Id. The foreman
    of the jury responded by stating that it was extremely difficult for
    the jurors to render the verdict since the defendant “by moral standards
    is a minor.”   
    Id. Expressing the
    consensus of most or all jurors, the
    foreman urged the judge to give the defendant “his best opportunity in life”
    by committing Dillon to the Youth Authority.       
    Id. The district
    court
    followed the advice of the jury, but the Court of Appeals ruled that at the
    time the offense was committed, Dillon was ineligible as a matter of law to
    be committed to the Youth Authority.        
    Id. at 725–26.
      The case was
    remanded for resentencing, and the district court, left with no choice,
    sentenced Dillon to life in prison. 
    Id. at 726.
    In reviewing the conviction and sentence, the California Supreme
    Court rejected challenges to felony murder based upon due process,
    reasoning that the legislature had defined the crime so as not to require a
    mens rea element for felony murder. 
    Id. at 718.
    That, however, was not
    the end of the matter, as the court turned to the question of whether a
    first-degree murder conviction could be supported against the seventeen-
    year-old defendant under the facts and circumstances of the case. See 
    id. at 719.
    The court noted that the record showed that the defendant at the
    time of the events “was an unusually immature youth.” 
    Id. at 726–27.
    According to the court, the defendant was “not the prototype of a hardened
    criminal who poses a grave threat to society.” 
    Id. at 727.
    The court noted
    there was “ample evidence that because of his immaturity he neither
    foresaw the risk he was creating nor was able to extricate himself without
    panicking when that risk seemed to eventuate.” 
    Id. The court
    further
    noted the discrepancy in punishment of the defendant compared to his
    60
    coconspirators in the venture, who, although they did not pull the trigger,
    nonetheless had armed themselves with shotguns and knives. 
    Id. In the
    end, the court found life in prison violated the cruel and
    unusual punishment clause of the California Constitution. 
    Id. Because he
    intentionally killed the victim without legal provocation, however, the
    defendant was guilty of second-degree murder. 
    Id. The conviction
    was
    affirmed as modified, and the case remanded to the district court for
    resentencing. 
    Id. Because the
    defendant was no longer guilty of first-
    degree murder, the district court on remand was “to determine whether to
    recommit him to the Youth Authority.” 
    Id. IV. Framework
    of Challenges to the Felony-Murder Rule.
    A. Transferred Intent and Due Process.         The notion that the
    felony-murder rule embraces a theory of transferred intent may be
    attacked on the ground that it violates due process and constitutes cruel
    and unusual punishment. The outlines of the argument were developed
    some decades ago by Roth and Sundby. See Roth & Sundby, 70 Cornell
    L. Rev. at 460–90.
    The argument begins with In re Winship, 
    397 U.S. 358
    , 
    90 S. Ct. 1068
    (1970).    In In re Winship, the United States Supreme Court
    emphasized that under the Due Process Clause of the United States
    Constitution, the accused is protected “against conviction except upon
    proof of every fact necessary to constitute the crime with which he is
    charged” beyond a reasonable doubt. 
    Id. at 364,
    90 S. Ct. at 1073. In
    Mullaney v. Wilbur, the Court emphasized that the state could not shift the
    burden of proof to the defendant to show “heat of passion” sufficient to
    avoid conviction of murder. 
    421 U.S. 684
    , 703–04, 
    95 S. Ct. 1881
    , 1892
    (1975).
    61
    The Supreme Court then seemed to retreat from In re Winship and
    Mullaney in Patterson v. New York, 
    432 U.S. 197
    , 
    97 S. Ct. 2319
    (1977).
    In Patterson, the Court upheld a state statute that required the defendant
    to prove the affirmative defense of severe emotional distress to a charge of
    murder.    
    Id. at 205–06,
    97 S. Ct. at 2324–25.     Language in Patterson
    emphasized that the state had the power to define the elements of the
    crime. 
    Id. at 205,
    97 S. Ct. at 2324. At the same time, however, the court
    indicated that there were constitutional limits to the state’s definitional
    power. 
    Id. at 210,
    97 S. Ct. at 2327.
    The United States Supreme Court case revisited Mullaney and
    Patterson issues in Sandstrom, 
    442 U.S. 510
    , 
    99 S. Ct. 2450
    .              In
    Sandstrom the trial court had instructed the jury that “the law presumes
    that a person intends the ordinary consequences of his voluntary acts.”
    
    Id. at 512,
    99 S. Ct. at 2453. The Sandstrom Court found the instruction
    flawed because it shifted the burden of proving intent. 
    Id. at 524,
    99 S. Ct.
    at 2459.
    The felony-murder rule has been justified under a theory of
    “transferred intent,” namely, that the mens rea required for murder is
    provided by imputing the mens rea from the defendant’s felonious act. See
    Roth & Sundby, 70 Cornell L. Rev. at 453. Once a jury concludes that a
    killing had been committed in the course of the commission of a felony,
    the necessary culpability required for murder must be presumed. See 
    id. at 460.
       The presumption of the necessary mens rea as arising out of
    something else—namely the commission of a felony where another has
    murdered someone—is subject to serious challenge under Sandstrom. 
    Id. at 469.
    B. Legislative Definitions of Crime and Due Process and Cruel
    and Unusual Punishment.          As second theoretical defense of felony
    62
    murder eschews any fictitious transferred intent but emphasizes the
    ability of the legislature to define crimes. According to this theory, the
    legislature is free to enact a felony-murder rule that does not require the
    state to prove the traditional mens rea normally associated with the crime
    of murder.    But a bedrock principle of criminal law has been that
    imposition of serious criminal sanctions ought to reflect culpability.
    The United States Supreme Court considered the question of mens
    rea requirement in Morissette v. United States, 
    342 U.S. 246
    , 
    72 S. Ct. 240
    (1952).   In Morissette, the defendant had taken what he thought were
    abandoned shell casings from a government bombing range, compressed
    the shells, and sold the metal for $84. 
    Id. at 247,
    72 S. Ct. at 242. He
    was charged with conversion of government property. 
    Id. at 248,
    72 S. Ct.
    at 242. The trial court refused to allow the defendant to assert that he
    believed the property was abandoned on the ground that intent was
    presumed.    The United States Court of Appeals for the Sixth Circuit
    affirmed, holding the statute did not require the government to prove
    criminal intent. 
    Id. at 249–50,
    72 S. Ct. at 242–48.
    The Supreme Court reversed. 
    Id. at 276,
    72 S. Ct. at 256. In an
    opinion by Justice Jackson, the Court noted,
    The contention that an injury can amount to a crime
    only when inflicted by intention is no provincial or transient
    notion. It is as universal and persistent in mature systems of
    law as belief in freedom of the human will and a consequent
    ability and duty of the normal individual to choose between
    good and evil. A relation between some mental element and
    punishment for a harmful act is almost as instinctive as the
    child’s familiar exculpatory “But I didn’t mean to . . . .”
    
    Id. at 250–51,
    72 S. Ct. at 243 (footnote omitted).
    Even where a statute did not expressly include an intent
    requirement, the Morissette Court emphasized “[c]ourts, with little
    63
    hesitation or division, found an implication of the requirement as to
    offenses that were taken over from the common law.” 
    Id. at 252,
    72 S. Ct.
    at 244. The Court declined to depart from the common law mens rea
    requirement in light of the statutory silence in federal conversion law. 
    Id. at 262,
    72 S. Ct. at 249. Citing a state supreme court case, the Court
    noted, “It is alike the general rule of law, and the dictate of natural justice,
    that to constitute guilt there must be not only a wrongful act, but a
    criminal intention.” 
    Id. at 274,
    72 S. Ct. at 255 (quoting People v. Flack,
    
    26 N.E. 267
    , 270 (N.Y. 1891)). The Court recognized that while the mens
    rea element might be eliminated for certain regulatory crimes, the Court
    declined to do so for crimes under the federal conversion statute. 
    Id. at 262–63,
    72 S. Ct. at 249–50. While to do so might “ease the prosecution’s
    path to conviction,” it would “change the weights and balances in the
    scales of justice.” 
    Id. at 263,
    72 S. Ct. at 249; see also United States v.
    U.S. Gypsum Co., 
    438 U.S. 422
    , 436–37, 
    98 S. Ct. 2864
    , 2873 (1978).
    The United States Supreme Court considered the role of culpability
    in two felony-murder cases involving the death penalty in Enmund v.
    Florida, 
    458 U.S. 782
    , 
    102 S. Ct. 3368
    (1982), and Tison v. Arizona, 
    481 U.S. 137
    , 
    107 S. Ct. 1676
    (1987). In Enmund, the Court considered a case
    in which a nontriggerman getaway driver was convicted of felony murder
    and sentenced to 
    death. 458 U.S. at 784
    –85, 102 S. Ct. at 3370. In Tison,
    the Court considered a felony-murder case in which the defendants did
    not pull the trigger but were deeply involved in an underlying 
    crime. 481 U.S. at 139
    –41, 107 S. Ct. at 1678–79.
    In Enmund, the defendant drove the getaway car in an armed
    
    robbery. 458 U.S. at 784
    , 102 S. Ct. at 3370. His compatriots approached
    the targeted house and engaged in a fight with the occupants; as a result,
    the residents were killed. 
    Id. at 784,
    102 S. Ct. at 3369–70. Pursuant to
    64
    Florida law, the district court instructed the jury that “[t]he killing of a
    human being while engaged in the perpetration of or in the attempt to
    perpetrate the offense of robbery is murder in the first degree even though
    there is no premeditated design or intent to kill.” Id. at 
    784–85, 102 S. Ct. at 3370
    (alteration in original).      The defendant was convicted and
    sentenced to death.     
    Id. at 785,
    102 S. Ct. at 3370.        The defendant
    appealed, claiming that the imposition of the death penalty under the
    circumstances violated the Eighth Amendment proscription against cruel
    and unusual punishment. 
    Id. at 787,
    102 S. Ct. at 3371.
    The Supreme Court agreed. 
    Id. at 801,
    102 S. Ct. at 3378–79. The
    Enmund Court emphasized that to impose the death penalty pursuant to
    a felony-murder conviction of a nontriggerman would not further either of
    the goals of deterrence or retribution. 
    Id. at 800,
    102 S. Ct. at 3378. With
    respect to deterrence, the Court noted that “if a person does not intend
    that life be taken . . . the possibility that the death penalty will be imposed
    for vicarious felony murder will not ‘enter into the cold calculus that
    precedes the decision to act.’ ’’ 
    Id. at 799,
    102 S. Ct. at 3377 (quoting
    Gregg v. Georgia, 
    428 U.S. 153
    , 186, 
    96 S. Ct. 2909
    , 2931 (1976)). Aside
    from a lack of intent that might be deterred, the Court noted that there
    was no reason to believe that death so frequently occurs during the course
    of a felony that it would be a substantial deterrent to the underlying felony
    itself. 
    Id. at 799,
    102 S. Ct. at 3377–78. The Enmund Court further cited
    three studies that indicated the incidence of murder that occurred in
    connection with robberies hovered at only approximately .5%. 
    Id. at 799–
    800 
    nn.23–24, 102 S. Ct. at 3378
    nn.23–24.
    The Enmund Court then turned to retribution. 
    Id. at 800,
    102 S. Ct.
    at 3378. The Court concluded that it was unconscionable to treat the
    triggerman and the nontriggerman alike for purposes of imposing the
    65
    death penalty. 
    Id. at 801,
    102 S. Ct. at 3378. According to the Enmund
    Court, “American criminal law has long considered a defendant’s
    intention—and therefore his moral guilt—to be critical to ‘the degree of
    [his] criminal culpability.’ ” 
    Id. at 800,
    102 S. Ct. at 3378 (alteration in
    original) (quoting 
    Mullaney, 421 U.S. at 698
    , 95 S. Ct. at 1889).         The
    defendant’s punishment in Enmund, according to the Court, was not
    “tailored to his personal responsibility and moral guilt.” 
    Id. at 801,
    102
    S. Ct. at 3378.
    The Court took a different tack in Tison, 
    481 U.S. 137
    , 
    107 S. Ct. 1676
    . In Tison, the Court considered whether the death penalty arising
    from felony murder could be applied in a case where the defendants were
    substantial participants in the crime and where they manifested a reckless
    disregard for human life. See id. at 
    139–41, 107 S. Ct. at 1678
    –79. In
    Tison, the defendants were involved in a carefully planned and heavily
    armed effort to free their father and another convicted murderer from
    prison. 
    Id. at 139,
    107 S. Ct. at 1678. The prison break at first succeeded,
    with the escapees and his rescuers fleeing the area in a Lincoln
    automobile. 
    Id. at 139,
    107 S. Ct. at 1679. When the car ultimately had
    a flat tire, the party flagged down a family in a passing vehicle. 
    Id. at 139–
    40, 107 S. Ct. at 1679
    . The family was kidnapped and their car and the
    Lincoln driven into the desert. Id. at 1
    40, 107 S. Ct. at 1679
    . While the
    family, standing in front of the Lincoln, pled for their lives, the father and
    another compatriot fatally shot the family. 
    Id. at 140–41,
    107 S. Ct. at
    1679. The defendants at the time were near the other automobile where
    they had gone to fetch water for the victims. 
    Id. The defendants
    were
    convicted of felony murder, sentenced to death, and lost their appeal. 
    Id. at 141–43,
    107 S. Ct. at 1680. They then launched a postconviction-relief
    66
    challenge to their death sentence, calling it cruel and unusual under the
    Eighth Amendment. 
    Id. at 143
    , 
    152, 107 S. Ct. at 1680
    –81, 1685.
    The Tison Court upheld the death sentences. 
    Id. at 158,
    107 S. Ct.
    at 1688.   The Court observed that in Enmund, “the Court found that
    Enmund’s degree of participation in the murders was so tangential that it
    could not be said to justify a sentence of death.” 
    Id. at 148,
    107 S. Ct. at
    1683 (emphasis omitted).        In contrast, in Tison, the defendants
    participated extensively in the escape, intentionally brought guns into the
    prison to arm the murderers, participated fully in kidnapping and robbery,
    and, after the murders, did nothing to aid the victims. 
    Id. at 151–52,
    107
    S. Ct. at 1685. Unlike in Enmund, the involvement of the defendants in
    the crimes was not minor, but “substantial.” 
    Id. at 158,
    107 S. Ct. at 1688.
    The Tison Court held that the defendants’ major participation in the felony
    committed, combined with reckless indifference to human life, was
    sufficient to satisfy the Enmund culpability requirement. 
    Id. Justice Brennan
    and three other members of the court dissented.
    
    Id. at 159,
    107 S. Ct. at 1689 (Brennan, J., dissenting).       According to
    Justice Brennan, the felony-murder rule was a curious “living fossil from
    a legal era in which all felonies were punishable by death.” 
    Id. Justice Brennan
    saw parallels with Enmund. 
    Id. at 161,
    107 S. Ct. at 1690. In
    both cases, the defendants did not shoot the victims and there was nothing
    in the record to indicate intent to kill. 
    Id. Justice Brennan
    rejected the
    notion that a reckless actor could be held to the same degree of
    accountability as an intentional actor, noting that “[t]he reckless actor has
    not chosen to bring about the killing in the way the intentional actor has.”
    
    Id. at 170,
    107 S. Ct. at 1695. According to Justice Brennan, “the criminal
    law must ensure that the punishment an individual receives conforms to
    the choices that individual has made.” 
    Id. at 171,
    107 S. Ct. at 1695. As
    67
    a result, Justice Brennan argued that the death penalty could not be
    imposed under the facts presented. 
    Id. at 182,
    107 S. Ct. at 1701.
    C. Application of Felony Murder to Children in Light of Recent
    Developments in Juvenile Justice. As can be seen above, the felony-
    murder rule generally has substantial due process and proportionality
    problems. These well recognized challenges are greatly magnified in the
    context of juvenile offenders.      This case involves more than the
    conventional challenges to felony murder, but because a child is involved
    the due process and cruel and unusual punishment claim are on legal
    steroids. A body of literature has recently developed suggesting that, at
    least as applied to children, the felony-murder rule is unconstitutional.
    See Steven A. Drizin & Allison McGowen Keegan, Abolishing the Use of the
    Felony-Murder Rule When the Defendant Is a Teenager, 28 Nova L. Rev.
    507, 535–42 (2004) (“[W]e believe that there should be an absolute ban on
    the felony-murder doctrine for child defendants under the age of
    fourteen . . . .”); Emily C. Keller, Constitutional Sentences for Juveniles
    Convicted of Felony Murder in the Wake of Roper, Graham, & J.D.B., 11
    Conn. Pub. Int. L.J. 297, 309–23 (2012) [hereinafter Keller] (arguing life
    sentences without parole for juvenile convicted of felony murder is
    unconstitutional).
    Recent challenges to the application of felony murder to juveniles
    emphasize the juvenile justice cases recently decided by the United States
    Supreme Court. See generally Miller v. Alabama, 
    567 U.S. 460
    , 
    132 S. Ct. 2455
    (2012); J.D.B. v. North Carolina, 
    564 U.S. 261
    , 
    131 S. Ct. 2394
    (2011); Graham v. Florida, 
    560 U.S. 48
    , 
    130 S. Ct. 2011
    (2010); Roper v.
    Simmons, 
    543 U.S. 551
    , 
    125 S. Ct. 1183
    (2005).         The thrust of the
    argument is that while the felony-murder rule is generally in a weak
    68
    position, it simply cannot be sustained with respect to juvenile offenders.
    See Keller, 11 Conn. Pub. Int. L.J. at 316–18.
    First, critics note that the deterrence rational supporting felony
    murder is already weak with respect to adults. In Enmund, the Supreme
    Court stated that it was “quite unconvinced . . . that the threat that the
    death penalty will be imposed for murder will measurably deter one who
    does not kill and has no intention or purpose that life will be 
    taken.” 458 U.S. at 798
    –99, 
    102 S. Ct. 3377
    ; see also Keller, 11 Conn. Pub. Int. L.J. at
    317.
    If the Court is unconvinced that the death penalty in the felony-
    murder rule is a deterrent for adults, the Court would surely be
    unconvinced that life in prison with the possibility of parole would provide
    a deterrent for children who do not intend that life will be taken.      In
    Graham, for instance, the Supreme Court noted that juveniles “are less
    likely to take a possible punishment into consideration when making
    
    decisions.” 560 U.S. at 72
    , 130 S. Ct. at 2028–29. In Roper, the Supreme
    Court noted “[t]he likelihood that the teenage offender has made the kind
    of cost-benefit analysis that attaches any weight to the possibility of
    execution is so remote as to be virtually 
    nonexistent.” 543 U.S. at 572
    ,
    125 S. Ct. at 1196 (alteration in original) (quoting Thompson v. Oklahoma,
    
    487 U.S. 815
    , 837, 
    108 S. Ct. 2687
    , 2700 (1988)). As our court has noted,
    “children lack the risk-calculation skills adults are presumed to possess
    and are inherently sensitive, impressionable, and developmentally
    malleable.” State v. Lyle, 
    854 N.W.2d 378
    , 389 (Iowa 2014); see also Keller,
    11 Conn. Pub. Int. L.J. at 317–18. In State v. Null, we summed up the
    developments by noting that juvenile brains are not fully developed for
    executive functioning which effect behaviors “such as reasoning, abstract
    69
    thinking, planning, the anticipation of consequences, and impulse
    control.” 
    836 N.W.2d 41
    , 55 (Iowa 2013).
    Second, critics maintain that the retributive goals of criminal
    punishment have less force as applied to juveniles.           Retribution is
    appropriate goal for morally culpable offenders. But the felony-murder
    rule does not require the individual mens rea ordinarily required to
    support a murder conviction. With respect to children, the retributive
    goals of the felony-murder rule are further diminished because of the
    characteristics of youth. See 
    Roper, 543 U.S. at 571
    , 125 S. Ct. at 1196;
    see also Keller, 11 Conn. Pub. Int. L.J. at 316–17.
    V. Discussion.
    Justice Frankfurter noted long ago that “not the least significant test
    of the quality of a civilization is its treatment of those charged with crime,
    particularly with offenses which arouse the passions of a community.”
    Irvin v. Dowd, 
    366 U.S. 717
    , 729, 
    81 S. Ct. 1639
    , 1646 (1961) (Frankfurter,
    J., concurring). Harrison is guilty of significant crime and deserves to be
    punished accordingly. But the application of the felony-murder rule to
    him distorts the criminal justice system beyond recognition.
    First, although he certainly had the necessary mens rea to commit
    the robbery, the instructions in this case permitted the jury to find that if
    he was guilty of the crime of robbery, Harrison was also guilty of felony
    murder, or murder in the first degree. For all the reasons in the authorities
    cited above, this is a troublesome state of affairs. In order to comport with
    fundamental fairness, the issue is not whether Harrison had sufficient
    moral culpability to support robbery.      He did.    The issue is whether
    Harrison had sufficient moral culpability to support first-degree murder
    and a life sentence with possibility of parole, merely because of his
    participation in the robbery.     In order to support such a conviction
    70
    consistent with due process, the state must prove the elements of the
    underlying felony and, independently, sufficient malice to support a
    conviction of murder.    Yet, the instructions permitted the jury to find
    Harrison guilty of murder without a finding of malice independent of the
    underlying felony.
    Further, the limited moral culpability that may be assigned to
    Harrison is further diminished by the fact that he was a child. Without
    question, the teachings of Miller, Graham, and Roper establish that the
    moral culpability of juveniles even for horrendous crimes is diminished by
    their lack of neurological and psychological development. Thus, the very
    thin basis of culpability that might support the felony-murder rule in some
    circumstances is further diminished by the age of Harrison.
    Second, there is the issue of deterrence. As was powerfully pointed
    out in Enmund, it is hard to understand how the felony-murder rule deters
    when the defendant has no intention to commit the 
    crime. 458 U.S. at 798
    –99, 102 S. Ct. at 3377. As with moral culpability, the deterrence
    rationale for felony murder, already thin, is further diminished by the fact
    that Harrison was seventeen at the time of the offense.
    It is true that in this case, Harrison was not sentenced to life in
    prison without the possibility of parole. Instead, he was sentenced to life
    in prison with the possibility of parole as required by State v. Sweet, 
    879 N.W.2d 811
    , 839 (Iowa 2016).      Yet, there can be little doubt that his
    conviction of first-degree murder, albeit through a highly attenuated
    application of the felony-murder rule, is going to dramatically increase his
    prison term beyond that which he would have been imposed had he been
    convicted merely of robbery.
    There is no occasion today to reconsider whether the felony-murder
    rule is categorically unconstitutional on grounds of due process as applied
    71
    to adults. That is not the issue before us. Instead, the question is whether
    the felony-murder rule as applied to children is so attenuated from
    traditional notions of due process of law. For the above reasons, I would
    conclude that application of the felony-murder rule to persons under the
    age of eighteen is so lacking in relationship to criminal culpability as to
    amount to a violation of due process under both the United States and the
    Iowa Constitutions.
    I also write to express disagreement with the majority’s approach to
    cruel and unusual punishment under the Iowa Constitution. First, I note
    that no party before this court has advocated that Iowa should not follow
    the standards for determining cruel and unusual punishment set out in
    State v. Bruegger, 
    773 N.W.2d 862
    , 884 (Iowa 2009), and State v. Oliver,
    
    812 N.W.2d 636
    , 640 (Iowa 2012).           We have not held that the federal
    standards are applicable under the Iowa Constitution as there has been
    no case where the issue has been contested.
    In any rate, in applying the federal standards, I would not put much
    weight onto the national consensus in considering the issue before us.
    The exploration of national consensus is a technique utilized by the United
    States Supreme Court to address its federalism concerns, namely, a
    concern that the United States Supreme Court must set a nationwide
    standard. Such federalism concerns tend to dilute the scope of individual
    rights and drive the decision toward a lowest acceptable common
    denominator. Such federalism concerns simply are not applicable when a
    state considers a constitutional question that does not apply outside the
    state.
    In addition, I do not agree with the majority’s handling of Bruegger
    in considering an as-applied standard. In Bruegger, we found that there
    was reason to believe that an as-applied challenge under article I, section
    72
    17 may be 
    present. 773 N.W.2d at 885
    . Among other factors, we cited the
    breadth of the underlying statute, Bruegger’s age when the predicate
    offense was committed, and the geometric increase in criminal sanction.
    
    Id. at 884–85.
    First, the breadth of the crime, the age of Bruegger when the
    predicate offense was committed, and the geometric increase in sentence,
    were factors, not criteria. The factors were never intended to establish a
    ceiling or ironclad set of criteria for determining whether a sentence was
    cruel and unusual under article I, section 17, but rather the general
    nature of the factors that may point in the direction of finding a sentence
    so grossly disproportional as to amount to a violation of article I, section
    17.
    Second, the Bruegger factors are met in this case. Although the Iowa
    felony-murder statute has been limited in important ways, it is still very
    broad. Any person who simply participates in a robbery may be found
    guilty of felony murder, even if that person did not bring a weapon to the
    scene, had no knowledge that weapons would be present at the scene, and
    had nothing to do with the murder. Also, Harrison was seventeen at the
    time of the crime. And, instead of being exposed to the sanction for the
    crime he clearly was guilty of committing, robbery, which carries a term of
    years sentence, Harrison was sentenced to life in prison with possibility of
    parole. There seems little doubt that Harrison’s prison sentence under
    felony murder will be geometrically longer than that which would have
    resulted if he had been convicted only of robbery.
    It is true, of course, that Harrison is eligible for parole. That, of
    course, might be a mitigating factor, particularly if eligibility for parole is
    considered soon after he has reached full maturity and correctional
    authorities have an opportunity to evaluate his rehabilitation.         And a
    73
    meaningful opportunity to be heard must mean more than a paper review
    but must involve a serious assessment of the maturity and rehabilitation
    of the defendant. Even so, however, the difference between a sentence of
    life in prison with a meaningful opportunity to show rehabilitation and
    maturity after a decade in prison in substantially more severe than a mere
    conviction for robbery.
    I find it unnecessary to reach the question of whether life without
    parole is categorically unconstitutional under article I, section 17, but I
    would hold that in this case, a life sentence with the possibility of parole,
    the harshest sentence available to a child, is grossly disproportional to
    what he deserves, namely, a sentence for robbery or perhaps involuntary
    manslaughter.
    VI. Conclusion.
    For the above reasons, I respectfully dissent.
    Wiggins, J., joins this dissent.