State v. Lotter , 311 Neb. 878 ( 2022 )


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    - 878 -
    Nebraska Supreme Court Advance Sheets
    311 Nebraska Reports
    STATE v. LOTTER
    Cite as 
    311 Neb. 878
    State of Nebraska, appellee, v.
    John L. Lotter, appellant.
    ___ N.W.2d ___
    Filed July 1, 2022.   Nos. S-20-363, S-20-366, S-20-367.
    1. Postconviction: Constitutional Law: Appeal and Error. In appeals
    from postconviction proceedings, an appellate court reviews de novo a
    determination that the defendant failed to allege sufficient facts to dem-
    onstrate a violation of his or her constitutional rights or that the record
    and files affirmatively show that the defendant is entitled to no relief.
    2. Postconviction: Judgments: Appeal and Error. Whether a claim
    raised in a postconviction proceeding is procedurally barred is a ques-
    tion of law which an appellate court reviews independently of the lower
    court’s ruling.
    3. Limitations of Actions. If the facts in a case are undisputed, the issue
    as to when the statute of limitations begins to run is a question of law.
    4. Postconviction: Constitutional Law. Postconviction relief is a very
    narrow category of relief, available only to remedy prejudicial constitu-
    tional violations that render the judgment void or voidable.
    5. Postconviction: Constitutional Law: Proof. A postconviction motion
    must allege facts which, if proved, constitute a denial or violation of a
    defendant’s rights under the U.S. or Nebraska Constitution, causing the
    judgment against the defendant to be void or voidable.
    6. ____: ____: ____. Under the Nebraska Postconviction Act, an eviden-
    tiary hearing is not required when (1) the motion does not contain fac-
    tual allegations which, if proved, constitute an infringement of the mov-
    ant’s constitutional rights rendering the judgment void or voidable; (2)
    the motion alleges only conclusions of fact or law without supporting
    facts; or (3) the records and files affirmatively show that the defendant
    is entitled to no relief.
    7. Postconviction. The need for finality in the criminal process requires
    that a defendant bring all claims for relief at the first opportunity.
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    STATE v. LOTTER
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    311 Neb. 878
    8. Postconviction: Appeal and Error. It is fundamental that a motion
    for postconviction relief cannot be used to secure review of issues
    which were known to the defendant and could have been litigated on
    direct appeal.
    9. ____: ____. When an issue could have been raised on direct appeal, it is
    procedurally barred from postconviction relief, no matter how the issues
    may be phrased or rephrased.
    10. Postconviction: Pleadings. The effect of 
    Neb. Rev. Stat. § 29-3001
    (3)
    (Reissue 2016) is to require that all available grounds for postconviction
    relief must be stated in the initial postconviction motion and, once that
    motion has been judicially determined, any subsequent postconviction
    motion regarding the same conviction and sentence may be dismissed by
    the district court unless the motion affirmatively shows on its face that
    the basis relied upon for relief was not available at the time of filing the
    prior motion.
    11. ____: ____. A defendant is entitled to bring a successive postconviction
    motion only when the face of the motion affirmatively shows that the
    issues raised therein could not have been raised in prior motions.
    12. Postconviction: Limitations of Actions: Sentences: Death Penalty.
    The 1-year limitation period set out in 
    Neb. Rev. Stat. § 29-3001
    (4)
    (Reissue 2016) governs all postconviction motions, including successive
    motions and those challenging a death sentence.
    13. Postconviction. For purposes of 
    Neb. Rev. Stat. § 29-3001
    (4)(b)
    (Reissue 2016), the factual predicate for a postconviction claim is prop-
    erly understood as the important objective facts that support the claim.
    14. Postconviction: Time. The 1-year period in 
    Neb. Rev. Stat. § 29-3001
    (4)(b) (Reissue 2016) begins to run when the objective facts
    underlying the claim could reasonably be discovered, and that date is
    distinct from discovering that those facts are actionable.
    15. ____: ____. The inquiry for purposes of 
    Neb. Rev. Stat. § 29-3001
    (4)(b)
    (Reissue 2016) concerns when the important objective facts could rea-
    sonably have been discovered, not when the claimant should have dis-
    covered the legal significance of those facts.
    16. Mental Competency. The factual predicate for an intellectual disability
    claim under Atkins v. Virginia, 
    536 U.S. 304
    , 
    122 S. Ct. 2242
    , 
    153 L. Ed. 335
     (2002), does not depend on either a formal clinical diagnosis or
    a particular intelligence quotient score.
    17. ____. The important objective facts supporting a claim of intellectual
    disability under Atkins v. Virginia, 
    536 U.S. 304
    , 
    122 S. Ct. 2242
    , 
    153 L. Ed. 335
     (2002), include facts relating to subaverage intellectual func-
    tioning, deficits in adaptive functioning, and the onset of these deficits
    during the developmental period.
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    STATE v. LOTTER
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    311 Neb. 878
    18. Mental Competency: Presumptions. The plain language of 
    Neb. Rev. Stat. § 28-105.01
    (3) (Cum. Supp. 2020) does not establish a strict cutoff
    score of 70 on an intelligence quotient test; rather, it creates an eviden-
    tiary presumption in favor of finding intellectual disability when the
    defendant has an intelligence quotient score of 70 or below on a reliably
    administered test.
    19. Mental Competency: Evidence: Appeal and Error. Nebraska appel-
    late courts have not construed 
    Neb. Rev. Stat. § 28-105.01
    (3) (Cum.
    Supp. 2020) in a way that would prohibit those with a score above 70 on
    an intelligence quotient test from presenting other evidence that would
    support a finding of intellectual disability.
    20. Constitutional Law: Sentences. Generally, state courts considering a
    matter on collateral review must give retroactive effect to new substan-
    tive rules of federal constitutional law. Substantive rules of federal con-
    stitutional law include rules forbidding criminal punishment of ­certain
    primary conduct, as well as rules prohibiting a certain category of pun-
    ishment for a class of defendants because of their status or offense.
    21. Postconviction: Constitutional Law: Time. Neither Hall v. Florida,
    
    572 U.S. 701
    , 
    134 S. Ct. 1986
    , 
    188 L. Ed. 1007
     (2014), nor Moore
    v. Texas, ___ U.S. ___, 
    137 S. Ct. 1039
    , 
    197 L. Ed. 2d 416
     (2017),
    announced a new substantive rule of constitutional law that must be
    applied retroactively to cases on postconviction collateral review.
    22. Postconviction: Death Penalty: Time. The holding in Sawyer v.
    Whitley, 
    505 U.S. 333
    , 
    112 S. Ct. 2514
    , 
    120 L. Ed. 2d 269
     (1992), does
    not require a state court to excuse procedural defaults in postconviction
    cases or prevent a state court from enforcing its procedural or time bar
    rules when presented with a challenge to imposition of the death penalty
    on postconviction collateral review.
    23. Postconviction: Time: Appeal and Error. Generally, when the timeli-
    ness of a postconviction motion is at issue, the defendant must raise all
    applicable arguments in the district court to preserve them for appel-
    late review.
    24. Statutes: Legislature: Intent. When construing a statute, a court must
    determine and give effect to the purpose and intent of the Legislature
    as ascertained from the entire language of the statute considered in its
    plain, ordinary, and popular sense.
    25. Statutes: Appeal and Error. The rules of statutory interpretation require
    an appellate court to give effect to the entire language of a statute, and
    to reconcile different provisions of the statutes so they are consistent,
    harmonious, and sensible.
    26. Death Penalty: Sentences: Mental Competency: Statutes:
    Legislature: Pleadings. 
    Neb. Rev. Stat. § 28-105.01
    (2) (Cum. Supp.
    2020) establishes a statutory right prohibiting imposition of the death
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    STATE v. LOTTER
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    penalty on any person with an intellectual disability. To enforce that
    statutory right, the Legislature enacted a specific statutory procedure to
    allow a defendant facing the death penalty to file a verified motion and
    request a hearing to determine intellectual disability, before any sentenc-
    ing determination is made.
    27.   Statutes: Legislature: Intent: Words and Phrases. As a general prin-
    ciple of statutory construction, use of the phrase “notwithstanding any
    other provision of law” in a statute signals legislative intent to override
    other provisions of law that conflict with the statute.
    28.   Postconviction: Limitations of Actions: Words and Phrases. The
    phrase “notwithstanding any other provision of law” in 
    Neb. Rev. Stat. § 28-105.01
     (Cum. Supp. 2020) neither impacts nor overrides the pro-
    cedural and time limitations applicable to postconviction motions under
    the Nebraska Postconviction Act.
    29.   Death Penalty: Legislature: Initiative and Referendum. The
    Legislature’s repeal of the death penalty in 2015 Neb. Laws, L.B. 268,
    never went into effect, because upon the filing of a referendum petition
    appearing to have a sufficient number of signatures, operation of the
    legislative act was suspended so long as the verification and certification
    process ultimately determines that the petition had the required number
    of valid signatures.
    30.   Death Penalty: Sentences: Initiative and Referendum. Because 2015
    Neb. Laws, L.B. 268, was suspended and never went into effect, any
    death sentences in effect at the time were unchanged.
    Appeal from the District Court for Richardson County:
    Vicky L. Johnson, Judge. Affirmed.
    Timothy S. Noerrlinger, of Naylor & Rappl, and Rebecca E.
    Woodman, pro hac vice, for appellant.
    Douglas J. Peterson, Attorney General, and James D. Smith,
    Senior Assistant Attorney General, for appellee.
    Heavican, C.J., Miller-Lerman, Cassel, Stacy, Funke,
    and Papik, JJ.
    Stacy, J.
    In this successive motion for postconviction relief, John L.
    Lotter presents two claims challenging the constitutionality
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    STATE v. LOTTER
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    311 Neb. 878
    of his death sentences. His first claim alleges the sentences
    were effectively vacated, and then unconstitutionally “reim-
    posed,” as a result of the legislative process surrounding L.B.
    268—a bill passed by the Nebraska Legislature in 2015 1 and
    repealed by public referendum thereafter. We refer to this as
    Lotter’s “L.B. 268 claim.” His second claim alleges that he
    was diagnosed as intellectually disabled in 2018 and, therefore,
    is ineligible for imposition of the death penalty under the U.S.
    Supreme Court’s holding in Atkins v. Virginia. 2 We refer to this
    as Lotter’s “Atkins claim.”
    The district court denied postconviction relief on both of
    Lotter’s claims without conducting an evidentiary hearing.
    It determined the L.B. 268 claim was meritless under settled
    precedent. It did not reach the merits of the Atkins claim
    because it determined the claim was both procedurally barred
    and time barred under Nebraska postconviction law.
    Lotter appeals, arguing he was entitled to an evidentiary
    hearing on both claims. We affirm.
    I. BACKGROUND
    In 1995, a jury convicted Lotter of three counts of first
    degree murder, three counts of use of a weapon to commit a
    felony, and one count of burglary. 3 He was sentenced to death
    for each murder conviction and to terms of incarceration on
    the convictions for burglary and use of a weapon. 4 On direct
    appeal, the burglary conviction was vacated and all other
    convictions and sentences were affirmed. 5 Lotter’s criminal
    1
    See 2015 Neb. Laws, L.B. 268.
    2
    Atkins v. Virginia, 
    536 U.S. 304
    , 
    122 S. Ct. 2242
    , 
    153 L. Ed. 2d 335
    (2002).
    3
    See State v. Lotter, 
    255 Neb. 456
    , 
    586 N.W.2d 591
     (1998), modified on
    denial of rehearing 
    255 Neb. 889
    , 
    587 N.W.2d 673
     (1999), cert. denied
    
    526 U.S. 1162
    , 
    119 S. Ct. 2056
    , 
    144 L. Ed. 2d 222
    .
    4
    
    Id.
    5
    
    Id.
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    STATE v. LOTTER
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    311 Neb. 878
    judgments became final on June 7, 1999, when the U.S.
    Supreme Court denied his petition for writ of certiorari. 6
    Between 1999 and 2017, Lotter filed four motions for post-
    conviction relief, all of which were found to be meritless. 7 In
    addition, Lotter filed an unsuccessful motion for postconvic-
    tion DNA testing in 2001, 8 and unsuccessful petitions for fed-
    eral habeas corpus relief in 2011 9 and 2017. 10 None of Lotter’s
    prior postconviction motions alleged a claim that he is intel-
    lectually disabled under Atkins.
    On March 27, 2018, Lotter filed, in each of his three crimi-
    nal cases, the operative motions for postconviction relief at
    issue in this appeal. The verified motions were identical, and
    the district court consolidated them and generally referred to
    them collectively as Lotter’s fifth postconviction motion. For
    ease of reference, we do the same.
    As stated, Lotter’s fifth postconviction motion alleges two
    grounds for relief. Lotter’s L.B. 268 claim alleges that in
    2015, when the Legislature passed L.B. 268 abolishing the
    death penalty, it effectively vacated his death sentences and
    imposed life sentences. Lotter alleges that when L.B. 268
    was subsequently repealed by public referendum, it resulted
    in “re-imposition” of his death sentences, which violated his
    6
    
    Id.
    7
    See, State v. Lotter, 
    301 Neb. 125
    , 
    917 N.W.2d 850
     (2018) (affirming
    denial of postconviction motions filed in 2017); State v. Lotter, case
    Nos. S-12-837 through S-12-839 (2013) (summarily affirming denial of
    postconviction motions filed in 2012); State v. Lotter, 
    278 Neb. 466
    , 
    771 N.W.2d 551
     (2009) (affirming denial of postconviction motions filed in
    2007); State v. Lotter, 
    266 Neb. 245
    , 
    664 N.W.2d 892
     (2003), (superseded
    by statute as stated in State v. Harris, 
    292 Neb. 186
    , 
    871 N.W.2d 762
    (2015); affirming denial of amended postconviction motions filed in 1999;
    and affirming denials of motions for new trial and petitions for writ of
    error coram nobis filed in 1999).
    8
    State v. Lotter, 
    266 Neb. 758
    , 
    669 N.W.2d 438
     (2003).
    9
    Lotter v. Houston, 
    771 F. Supp. 2d 1074
     (D. Neb. 2011).
    10
    Lotter v. Britten, No. 4:04CV3187, 
    2017 WL 744554
     (D. Neb. Feb. 24,
    2017).
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    STATE v. LOTTER
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    constitutional right to due process, violated his constitutional
    right to be free from cruel and unusual punishment, and
    amounted to an unconstitutional bill of attainder.
    Lotter’s Atkins claim alleges that in March 2018, his attor-
    ney retained Ricardo Weinstein, Ph.D., to determine whether
    Lotter is intellectually disabled. After evaluating Lotter’s intel-
    lectual and adaptive functioning, Weinstein issued a report con-
    cluding that Lotter “qualifies for the diagnosis of Intellectual
    Developmental Disability (formerly Mental Retardation).”
    On March 27, 2018, Lotter amended his fifth postconviction
    motion to add a claim that he is constitutionally ineligible
    for imposition of the death penalty under Atkins. 11 A copy of
    Weinstein’s report was attached as an exhibit to the opera-
    tive motion.
    In February 2020, the court held what was characterized
    as a records hearing 12 on Lotter’s fifth postconviction motion.
    Thereafter, the court entered an order denying postconviction
    relief on both claims without conducting an evidentiary hear-
    ing. In rejecting Lotter’s L.B. 268 claim, the district court
    relied on several recent postconviction opinions from this court
    rejecting nearly identical claims as meritless. 13 Based on that
    precedent, the court concluded as a matter of law that Lotter’s
    L.B. 268 claim did not entitle him to postconviction relief.
    The court did not address the merits of Lotter’s Atkins
    claim, because it determined the claim was both procedurally
    11
    Atkins, supra note 2.
    12
    See State v. Glover, 
    276 Neb. 622
    , 
    756 N.W.2d 157
     (2008) (recognizing
    district court has discretion to hold records hearing to receive existing files
    and records before deciding whether to grant or deny evidentiary hearing
    on motion for postconviction relief).
    13
    See, State v. Torres, 
    304 Neb. 753
    , 
    936 N.W.2d 730
     (2020), cert. denied
    ___ U.S. ___, 
    141 S. Ct. 295
    , 
    208 L. Ed. 2d 50
    ; State v. Mata, 
    304 Neb. 326
    , 
    934 N.W.2d 475
     (2019), cert. denied ___ U.S. ___, 
    141 S. Ct. 167
    ,
    
    207 L. Ed. 2d 1101
     (2020); State v. Jenkins, 
    303 Neb. 676
    , 
    931 N.W.2d 851
     (2019), cert. denied ___ U.S. ___, 
    140 S. Ct. 2704
    , 
    206 L. Ed. 2d 844
     (2020).
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    STATE v. LOTTER
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    311 Neb. 878
    barred and time barred under Nebraska postconviction law.
    The court found the claim was procedurally barred because
    Lotter had not raised it in any of his postconviction motions
    filed after 2002, when Atkins announced the constitutional rule
    that criminals who are intellectually disabled are ineligible for
    imposition of the death penalty.
    The court found that Lotter’s Atkins claim was time barred
    under 
    Neb. Rev. Stat. § 29-3001
    (4) (Reissue 2016), because
    it had not been filed within 1 year from any of the five trig-
    gering events identified in that statute. More specifically, the
    court rejected Lotter’s argument that his Atkins claim was
    timely under § 29-3001(4)(b), reasoning that Lotter could have,
    with reasonable diligence, discovered the factual predicate
    for his Atkins claim more than 1 year before he filed the fifth
    postconviction motion. The court also rejected Lotter’s argu-
    ment that his Atkins claim was timely under § 29-3001(4)(d),
    which requires that a postconviction claim be filed within 1
    year from “[t]he date on which a constitutional claim asserted
    was initially recognized by the Supreme Court of the United
    States or the Nebraska Supreme Court . . . .” The court rea-
    soned that Lotter’s claim was based on the constitutional right
    first announced nearly 20 years ago in Atkins, and it rejected
    Lotter’s contention that his claim was based on a new consti-
    tutional right recognized in the 2017 case of Moore v. Texas
    (Moore I), 14 a case we discuss later in our analysis.
    After concluding that neither of the claims presented in
    Lotter’s fifth postconviction motion entitled him to relief, the
    court denied the motion without an evidentiary hearing. Lotter
    filed this timely appeal.
    II. ASSIGNMENT OF ERROR
    Lotter assigns, consolidated and restated, that the district
    court erred by not granting an evidentiary hearing on both of
    the claims alleged in his fifth successive motion for postcon-
    viction relief.
    14
    Moore v. Texas, ___ U.S. ___, 
    137 S. Ct. 1039
    , 
    197 L. Ed. 2d 416
     (2017).
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    III. STANDARD OF REVIEW
    [1] In appeals from postconviction proceedings, an appel-
    late court reviews de novo a determination that the defendant
    failed to allege sufficient facts to demonstrate a violation of his
    or her constitutional rights or that the record and files affirma-
    tively show that the defendant is entitled to no relief. 15
    [2,3] Whether a claim raised in a postconviction proceeding
    is procedurally barred is a question of law which an appel-
    late court reviews independently of the lower court’s ruling. 16
    Similarly, if the facts in a case are undisputed, the issue as
    to when the statute of limitations begins to run is a question
    of law. 17
    IV. ANALYSIS
    To address Lotter’s assignments of error, we begin by
    reviewing the legal standards, both substantive and procedural,
    which govern proceedings under the Nebraska Postconvic­
    tion Act. 18
    1. Standards Governing
    Postconviction Relief
    [4,5] In Nebraska, postconviction relief is a very narrow
    category of relief, available only to remedy prejudicial con-
    stitutional violations that render the judgment void or void-
    able. 19 Under the postconviction statutes, defendants in cus-
    tody under sentence “may file a verified motion, in the court
    which imposed such sentence, stating the grounds relied upon
    and asking the court to vacate or set aside the sentence.” 20
    Such a motion must allege facts which, if proved, constitute a
    15
    State v. Torres, 
    300 Neb. 694
    , 
    915 N.W.2d 596
     (2018).
    16
    Mata, 
    supra note 13
    .
    17
    Torres, supra note 15.
    18
    See 
    Neb. Rev. Stat. §§ 29-3001
     to 29-3004 (Reissue 2016).
    19
    State v. Combs, 
    308 Neb. 587
    , 
    955 N.W.2d 322
     (2021).
    20
    § 29-3001(1).
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    denial or violation of his or her rights under the U.S. or
    Nebraska Constitution, causing the judgment against the
    defend­ant to be void or voidable. 21
    [6] The Nebraska Postconviction Act requires a court to
    grant a prompt hearing on a motion for postconviction relief
    “[u]nless the motion and the files and records of the case show
    to the satisfaction of the court that the prisoner is entitled to
    no relief . . . .” 22 Under this standard, an evidentiary hearing
    is not required when (1) the motion does not contain factual
    allegations which, if proved, constitute an infringement of the
    movant’s constitutional rights rendering the judgment void or
    voidable; (2) the motion alleges only conclusions of fact or law
    without supporting facts; or (3) the records and files affirma-
    tively show that the defendant is entitled to no relief. 23
    In addition to the substantive rules governing postconviction
    relief, there are procedural rules which can bar postconviction
    relief regardless of the merits of a particular claim. Here, the
    district court determined that Lotter’s Atkins claim was both
    procedurally barred and time barred under Nebraska law. We
    recite the general principles governing procedural bars and
    time bars in the next two sections of this opinion, and apply
    those principles later in our analysis.
    (a) Procedural Limitations on
    Postconviction Relief
    [7-9] The need for finality in the criminal process requires
    that a defendant bring all claims for relief at the first oppor-
    tunity. 24 Therefore, it is fundamental that a motion for post-
    conviction relief cannot be used to secure review of issues
    21
    State v. Martinez, 
    302 Neb. 526
    , 
    924 N.W.2d 295
     (2019); State v. Taylor,
    
    300 Neb. 629
    , 
    915 N.W.2d 568
     (2018).
    22
    § 29-3001(2).
    23
    See, State v. Munoz, 
    309 Neb. 285
    , 
    959 N.W.2d 806
     (2021); State v.
    Malone, 
    308 Neb. 929
    , 
    957 N.W.2d 892
     (2021), modified on denial of
    rehearing 
    309 Neb. 399
    , 
    959 N.W.2d 818
    .
    24
    State v. Lotter, 
    278 Neb. 466
    , 
    771 N.W.2d 551
     (2009).
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    which were known to the defendant and could have been liti-
    gated on direct appeal. 25 We have explained that when an issue
    could have been raised on direct appeal, it is procedurally
    barred from postconviction relief, 26 no matter how the issues
    may be phrased or rephrased. 27
    [10,11] Additionally, the statute governing postconviction
    relief expressly provides that a “court need not entertain a
    second motion or successive motions for similar relief on
    behalf of the same prisoner.” 28 We have long construed this
    provision to require that all available grounds for postconvic-
    tion relief must be stated in the initial postconviction motion
    and, once that motion has been judicially determined, any sub-
    sequent postconviction motion regarding the same conviction
    and sentence may be dismissed by the district court unless
    the motion affirmatively shows on its face that the basis
    relied upon for relief was not available at the time of filing
    the prior motion. 29 Stated differently, a defendant is entitled
    to bring a successive postconviction motion only when the
    face of the motion affirmatively shows that the issues raised
    therein could not have been raised in prior motions. 30 In the
    25
    
    Id.
    26
    See Mata, 
    supra note 13
    .
    27
    See State v. Otey, 
    236 Neb. 915
    , 
    464 N.W.2d 352
     (1991).
    28
    § 29-3001(3).
    29
    See State v. Reichel, 
    187 Neb. 464
    , 
    191 N.W.2d 826
     (1971). See, also,
    State v. Watkins, 
    284 Neb. 742
    , 746, 
    825 N.W.2d 403
    , 406 (2012) (holding
    “court will not entertain a successive motion for postconviction relief
    unless the motion affirmatively shows on its face that the basis relied upon
    for relief was not available at the time the movant filed the prior motion”);
    State v. Ryan, 
    257 Neb. 635
    , 
    601 N.W.2d 473
     (1999).
    30
    See Lotter, supra note 24, 
    278 Neb. at 477
    , 771 N.W.2d at 561 (finding
    Lotter’s constitutional claim based on allegation of perjured trial testimony
    was procedurally barred because “Lotter fails to allege that this evidence
    was unavailable before any of the numerous challenges already made to
    his convictions and sentences”). See, also, State v. Jackson, 
    296 Neb. 31
    ,
    
    892 N.W.2d 67
     (2017); State v. Marshall, 
    272 Neb. 924
    , 
    725 N.W.2d 834
    (2007); State v. Ortiz, 
    266 Neb. 959
    , 
    670 N.W.2d 788
     (2003).
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    absence of such affirmative allegations, there is “no justifica-
    tion for allowing a prisoner to continue litigation endlessly
    by piecemeal post conviction attacks on his conviction and
    sentence.” 31 A prisoner cannot wait to see if some postconvic-
    tion claims will succeed and, when they do not, dust off other
    claims and subsequently attempt to litigate them. 32
    (b) Time Limitations on
    Postconviction Claims
    In 2011, the Legislature amended the Nebraska Postconviction
    Act to establish a 1-year limitations period for filing postcon-
    viction motions. 33 Section 29-3001(4) of the act provides:
    (4) A one-year period of limitation shall apply to the
    filing of a verified motion for postconviction relief. The
    one-year limitation period shall run from the later of:
    (a) The date the judgment of conviction became final
    by the conclusion of a direct appeal or the expiration of
    the time for filing a direct appeal;
    (b) The date on which the factual predicate of the
    constitutional claim or claims alleged could have been
    discovered through the exercise of due diligence;
    (c) The date on which an impediment created by state
    action, in violation of the Constitution of the United
    States or the Constitution of Nebraska or any law of this
    state, is removed, if the prisoner was prevented from fil-
    ing a verified motion by such state action;
    (d) The date on which a constitutional claim asserted
    was initially recognized by the Supreme Court of the
    United States or the Nebraska Supreme Court, if the
    newly recognized right has been made applicable retro­
    actively to cases on postconviction collateral review; or
    (e) August 27, 2011.
    31
    Reichel, supra note 29, 
    187 Neb. at 467
    , 
    191 N.W.2d at 828
    .
    32
    See Ryan, 
    supra note 29
    .
    33
    See 2011 Neb. Laws, L.B. 137, § 1, now codified at § 29-3001(4).
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    [12] The 1-year limitation period set out in § 29-3001(4)
    governs all postconviction motions, including successive
    motions 34 and those challenging a death sentence. 35
    With this substantive and procedural framework in mind, we
    address Lotter’s assignments of error. Because Lotter’s primary
    arguments on appeal pertain to his Atkins claim, we address
    that claim first.
    2. Lotter’s Atkins Claim
    Lotter argues the district court erred by failing to grant
    him an evidentiary hearing on his Atkins claim. As stated, the
    district court denied an evidentiary hearing on Lotter’s Atkins
    claim after determining it was both procedurally barred and
    time barred under Nebraska law.
    To avoid being procedurally barred, the face of Lotter’s
    fifth postconviction motion must affirmatively show that his
    Atkins claim could not have been raised in any of his prior
    postconviction motions. 36 And to avoid being time barred under
    § 29-3001(4), Lotter’s Atkins claim must have been filed within
    1 year from one of the triggering events in that statute.
    As we read Lotter’s fifth postconviction motion, he asserts
    three reasons why his Atkins claim is not procedurally barred
    or time barred. The first two are somewhat interrelated, in that
    he argues the face of his fifth successive motion affirmatively
    shows he could not have raised an Atkins claim in any of his
    prior postconviction motions because (1) the factual predicate
    for his claim did not exist until he was diagnosed as intellec-
    tually disabled in March 2018 37 and/or (2) he could not have
    known he had a viable Atkins claim until the U.S. Supreme
    released its opinion in Moore I. 38 Alternatively, Lotter’s
    34
    See Torres, supra note 15.
    35
    See, e.g., id.; Mata, 
    supra note 13
    ; Lotter, supra note 7.
    36
    See Lotter, supra note 24. See, also, Jackson, 
    supra note 30
    ; Marshall,
    
    supra note 30
    ; Ortiz, 
    supra note 30
    .
    37
    See § 29-3001(4)(b).
    38
    See § 29-3001(4)(d). See, also, Moore I, supra note 14.
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    motion asserts that because he has been diagnosed as intellec-
    tually disabled, he can overcome Nebraska’s procedural and
    time bars by asserting a claim of “‘actual innocence’” under
    the U.S. Supreme Court’s holding in Sawyer v. Whitley. 39
    For the sake of completeness, we also note that Lotter’s
    appellate briefing presents an issue which was not expressly
    alleged in his fifth postconviction motion: He asserts that the
    language of 
    Neb. Rev. Stat. § 28-105.01
    (2) (Cum. Supp. 2020),
    which states, “Notwithstanding any other provision of law,
    the death penalty shall not be imposed upon any person with
    an intellectual disability,” effectively exempts an Atkins claim
    from all of the procedural and time limitations set out in the
    Nebraska Postconviction Act, and allows such a claim to be
    raised at any time.
    To analyze Lotter’s arguments, we begin with a review of
    the U.S. Supreme Court cases recognizing and refining the con-
    stitutional rule that forbids imposing the death penalty on those
    who are intellectually disabled. We then review Nebraska’s
    statute and case law defining intellectual disability for purposes
    of imposing the death penalty.
    (a) U.S. Supreme Court Precedent
    In the 2002 case of Atkins, 40 the U.S. Supreme Court first
    held that imposing the death penalty on “mentally retarded
    criminals” amounts to cruel and unusual punishment prohibited
    by the Eighth Amendment. The clinical term “mental retar-
    dation” has since been changed to “intellectual disability,” 41
    39
    Sawyer v. Whitley, 
    505 U.S. 333
    , 339, 
    112 S. Ct. 2514
    , 
    120 L. Ed. 2d 269
    (1992).
    40
    Atkins, 
    supra note 2
    , 
    536 U.S. at 321
    .
    41
    See, Hall v. Florida, 
    572 U.S. 701
    , 704, 
    134 S. Ct. 1986
    , 
    188 L. Ed. 2d 1007
    (2014) (citing “Rosa’s Law, 
    124 Stat. 2643
    ,” which changed entries in U.S.
    Code from “‘mental retardation’” to “‘intellectual disability’”); Robert L.
    Schalock et al., The Renaming of Mental Retardation: Understanding
    the Change to the Term Intellectual Disability, 45 Intellectual and
    Developmental Disabilities 116 (2007); American Psychiatric Association,
    Diagnostic and Statistical Manual of Mental Disorders 33 (5th ed. 2013).
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    and this opinion uses the current clinical term unless quoting
    directly from earlier opinions.
    The majority in Atkins acknowledged that just a decade
    earlier, in its 1989 opinion in Penry v. Lynaugh, 42 it found
    “insufficient evidence of a national consensus against execut-
    ing mentally retarded people convicted of capital offenses for
    us to conclude that it is categorically prohibited by the Eighth
    Amendment.” But Atkins observed that in the years follow-
    ing Penry, Congress and at least 18 state legislatures, includ-
    ing Nebraska’s, had enacted laws generally “prohibiting the
    execution of mentally retarded persons.” 43 The Atkins majority
    viewed that as a national legislative consensus that “death is
    not a suitable punishment for a mentally retarded criminal.” 44
    The majority concluded that imposing the death penalty on
    this class of offenders did not further the goals of deterrence
    or retribution underpinning the death penalty, and it found
    “no reason to disagree with the judgment of ‘the legislatures
    that have recently addressed the matter.’” 45 Atkins therefore
    announced a new constitutional rule which categorically for-
    bids imposing the death penalty on persons who are intellec­
    tually disabled.
    However, the majority in Atkins did not adopt a specific
    test for determining which offenders are intellectually dis-
    abled, observing there was not yet a “national consensus”
    on that question. 46 Instead, Atkins expressly left to the states
    “‘the task of developing appropriate ways to enforce the
    constitutional restriction.’” 47 But the Atkins majority empha-
    sized that when states are defining intellectual disability, they
    42
    Penry v. Lynaugh, 
    492 U.S. 302
    , 335, 
    109 S. Ct. 2934
    , 
    106 L. Ed. 2d 256
    (1989), abrogated, Atkins, 
    supra note 2
    .
    43
    Atkins, 
    supra note 2
    , 
    536 U.S. at 315
    .
    44
    
    Id.,
     
    536 U.S. at 321
    .
    45
    
    Id.
    46
    See 
    id.,
     
    536 U.S. at 317
    .
    47
    
    Id.
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    should be guided by current “clinical definitions of mental
    retardation.” 48 Atkins cited to clinical definitions promulgated
    by the American Psychiatric Association in its “Diagnostic
    and Statistical Manual of Mental Disorders” and the American
    Association of Mental Retardation (subsequently named
    “American Association on Intellectual and Developmental
    Disabilities”), 49 which Atkins summarized as defining “mental
    retardation [to] require not only subaverage intellectual func-
    tioning, but also significant limitations in adaptive skills such
    as communication, self-care, and self-direction that manifest
    before age 18.” 50
    In the decades since Atkins was decided, the U.S. Supreme
    Court has issued three opinions considering challenges to the
    sufficiency of a state’s definition of “intellectual disability”
    under the constitutional rule announced in Atkins. 51 In each
    post-Atkins case, the Court measured the state’s definition of
    intellectual disability against the current clinical definitions
    and the medical community’s diagnostic framework, which
    it has consistently described as having three criteria: “[1]
    significantly subaverage intellectual functioning, [2] deficits
    in adaptive functioning[,] and [3] onset of these deficits dur-
    ing the developmental period.” 52 Because Lotter relies on at
    48
    
    Id.,
     
    536 U.S. at 318
    .
    49
    
    Id.,
     
    536 U.S. at 308, n.3
    .
    50
    
    Id.,
     
    536 U.S. at 318
    .
    51
    Moore v. Texas, ___ U.S. ___, 
    139 S. Ct. 666
    , 
    203 L. Ed. 2d 1
     (2019);
    Moore I, supra note 14; Hall, 
    supra note 41
    .
    52
    Hall, 
    supra note 41
    , 572 U.S. at 710. Accord Moore I, supra note 14,
    
    137 S. Ct. at 1045
     (describing “the generally accepted, uncontroversial
    intellectual-disability diagnostic definition” as having “three core elements:
    (1) intellectual-functioning deficits . . . ; (2) adaptive deficits . . . ; and (3)
    the onset of these deficits while still a minor”); Moore, 
    supra note 51
    ,
    139 S. Ct. at 668 (“[t]o make a finding of intellectual disability, a court
    must see: (1) deficits in intellectual functioning—primarily a test-related
    criterion . . . ; (2) adaptive deficits, ‘assessed using both clinical evaluation
    and individualized . . . measures,’ . . . ; and (3) the onset of these deficits
    while the defendant was still a minor”).
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    least one of these post-Atkins cases to argue that his intellectual
    disability claim could not have been filed sooner than 2018, we
    summarize those cases before addressing his arguments.
    In the 2014 case of Hall v. Florida, 53 the Court examined
    Florida’s statutory definition of intellectual disability, which
    appeared on its face to incorporate the diagnostic framework
    referenced in Atkins. But the Florida Supreme Court had con-
    strued the statutory definition to impose a strict intelligence
    quotient (IQ) cutoff score of 70, and, under that construction,
    defendants with an IQ above 70 were prohibited from present-
    ing other evidence of intellectual disability, including evidence
    of adaptive deficits. Hall found that Florida’s definition of
    intellectual disability, as interpreted by its courts, was uncon-
    stitutional to the extent it considered an IQ score to be final
    and conclusive evidence of a defendant’s intellectual capacity.
    Such a construction, Hall explained, was not “informed by the
    views of medical experts,” 54 because the medical community
    does not support a fixed IQ cutoff, and instead “understand[s]
    that an IQ test score represents a range rather than a fixed
    number.” 55 Hall instructed that when using IQ test scores “to
    asses a defendant’s eligibility for the death penalty, a State
    must afford these test scores the same studied skepticism
    that those who design and use the tests do” 56 and therefore
    must take into account an IQ test’s “‘standard error of meas­
    urement’” or “SEM” range. 57 And when a defendant’s IQ
    53
    Hall, 
    supra note 41
    , 572 U.S. at 711 (noting Florida statute defined
    intellectual disability as “‘significantly subaverage general intellectual
    functioning existing concurrently with deficits in adaptive behavior
    and manifested during the period from conception to age 18’” and
    defined “‘significantly subaverage general intellectual functioning’” as
    “‘performance that is two or more standard deviations from the mean
    score on a standardized intelligence test’”).
    54
    Id., 572 U.S. at 721.
    55
    Id., 572 U.S. at 723.
    56
    Id.
    57
    Id., 572 U.S. at 722.
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    score falls within the test’s acknowledged margin of error, the
    defendant must be allowed to present additional evidence of
    intellectual disability, including testimony regarding adaptive
    deficits. The Hall majority stated that the “legal determination
    of intellectual disability is distinct from a medical diagnosis,
    but it is informed by the medical community’s diagnostic
    framework.” 58 The majority in Hall stopped short of holding
    that a state’s definition of intellectual disability will not satisfy
    the principles of Atkins unless it complies in all respects with
    the current diagnostic criteria employed by psychiatric profes-
    sionals, but it again emphasized that courts may “not disregard
    these informed assessments.” 59
    In the 2017 case of Moore I, the U.S. Supreme Court consid-
    ered the sufficiency of the definition used by the Texas Court
    of Criminal Appeals (Texas CCA) to find the defendant was
    not intellectually disabled. 60 The Supreme Court was critical of
    the definition applied by the Texas CCA, because it departed
    from the accepted clinical standards discussed in Atkins and
    Hall. 61 Among other shortcomings, the Texas definition relied
    on outdated lay perceptions and lay stereotypes to determine
    who was intellectually disabled. And when assessing deficits
    in adaptive functioning, the definition deviated from prevail-
    ing clinical standards by overemphasizing adaptive strengths.
    Based on these and other shortcomings, the Supreme Court
    held that the definition of intellectual disability relied upon
    by the Texas CCA created an unacceptable risk that the death
    penalty would be imposed on persons with intellectual dis-
    abilities, in violation of Atkins. Moore I therefore vacated the
    defendant’s death sentence and remanded the matter for further
    proceedings in accordance with the opinion.
    58
    
    Id.,
     572 U.S. at 721.
    59
    Id.
    60
    Moore I, supra note 14.
    61
    Id., 
    137 S. Ct. at 1044
     (admonishing that courts do not have “leave to
    diminish the force of the medical community’s consensus” when constru­
    ing statutory definitions of intellectual disability).
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    On remand, the Texas CCA reevaluated the evidence and
    again concluded the defendant did not meet the definition of
    an intellectually disabled person. The U.S. Supreme Court
    reversed that decision in Moore v. Texas (Moore II), 62 reason-
    ing that on remand, the Texas CCA may have used different
    language, but much of its analysis suffered from the same
    shortcomings identified in Moore I. The Supreme Court there-
    fore not only reversed the judgment of the Texas CCA, but
    affirmatively held that the defendant had shown he was a per-
    son with an intellectual disability and thus was ineligible for
    imposition of the death penalty under Atkins.
    (b) Nebraska’s Definition of
    Intellectual Disability
    In 1998, while Lotter’s case was pending on direct appeal,
    the Nebraska Legislature amended § 28-105.01 to provide:
    “Notwithstanding any other provision of law, the death
    penalty shall not be imposed upon any person with mental
    retardation.” 63 This statute was referenced in Atkins to sup-
    port the Court’s finding of a national legislative consensus that
    “the mentally retarded should be categorically excluded from
    execution.” 64 In 2013, the language of § 28-105.01(2) was
    amended to use the current clinical term “intellectual disabil-
    ity” instead of “mental retardation.” 65 Currently, the relevant
    provisions of § 28-105.01 provide:
    (2) Notwithstanding any other provision of law, the
    death penalty shall not be imposed upon any person with
    an intellectual disability;
    (3) As used in subsection (2) of this section, intel-
    lectual disability means significantly subaverage gen-
    eral intellectual functioning existing concurrently with
    62
    Moore II, supra note 51.
    63
    1998 Neb. Laws, L.B. 1266, § 2, codified at § 28-105.01(2) (Cum. Supp.
    1998).
    64
    Atkins, 
    supra note 2
    , 
    536 U.S. at 318
    .
    65
    See 2013 Neb. Laws, L.B. 23.
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    deficits in adaptive behavior. An [IQ] of seventy or below
    on a reliably administered [IQ] test shall be presumptive
    evidence of intellectual disability.
    (4) If (a) a jury renders a verdict finding the existence
    of one or more aggravating circumstances . . . the court
    shall hold a hearing prior to any sentencing determina-
    tion proceeding . . . upon a verified motion of the defense
    requesting a ruling that the penalty of death be precluded
    under subsection (2) of this section. If the court finds, by
    a preponderance of the evidence, that the defendant is a
    person with an intellectual disability, the death sentence
    shall not be imposed.
    Our 2010 opinion in State v. Vela 66 is the only case to date
    where we have applied the definition of intellectual disability
    in § 28-105.01(3). In Vela, the defendant was convicted of
    five counts of first degree murder. After the jury found the
    existence of aggravating circumstances, 67 the defendant filed
    a verified motion using the procedure in § 28-105.01(4)(a),
    seeking a ruling that he was intellectually disabled and there-
    fore ineligible for imposition of the death penalty. After
    an evidentiary hearing, the district court found the defend­
    ant had proved “significantly subaverage general intellectual
    functioning” 68 because the evidence showed he had a full-
    scale IQ test score of 75 on a reliably administered test and,
    adjusted for the SEM, the court considered that a score in a
    “‘range between 75 and 70.’” 69 But the district court found
    the defendant failed to prove, by a preponderance of the
    evidence, 70 that he also had significant “deficits in adaptive
    behavior.” 71 The court therefore overruled the motion, after
    66
    State v. Vela, 
    279 Neb. 94
    , 
    777 N.W.2d 266
     (2010).
    67
    See 
    Neb. Rev. Stat. § 29-2520
     (Cum. Supp. 2020).
    68
    § 28-105.01(3).
    69
    Vela, 
    supra note 66
    , 
    279 Neb. at 146
    , 
    777 N.W.2d at 304
    .
    70
    See § 28-105.01(4).
    71
    § 28-105.01(3).
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    which a three-judge panel imposed a sentence of death on
    each conviction.
    On direct appeal, we found no error in the district court’s
    conclusion that the defendant failed to prove he was intellec-
    tually disabled for purposes of § 28-105.01(2). Our analysis
    focused primarily on the court’s finding that the defendant had
    not proved the second factor of Nebraska’s statutory test, relat-
    ing to deficits in adaptive behavior. Vela was decided before
    Hall and both Moore cases, but our analysis relied on Atkins
    and appropriately emphasized the need to construe Nebraska’s
    statutory factors in a manner consistent with “current clinical
    models.” 72 Vela recognized that “[m]ental retardation is a clini-
    cal diagnosis” 73 and that “to reach any meaningful determina-
    tion of whether a convicted defendant with an IQ in the low
    70’s is a person with mental retardation” courts must apply the
    current clinical diagnostic standards. 74
    With this jurisprudential and statutory background in mind,
    we summarize Lotter’s allegations regarding his Atkins claim,
    after which we consider, de novo, whether that claim is proce-
    durally barred or time barred. 75
    (c) Lotter’s Allegations of
    Intellectual Disability
    Lotter’s fifth successive postconviction motion alleged that
    in 2018, his attorney retained an expert to evaluate whether
    Lotter is intellectually disabled. The expert reviewed Lotter’s
    records, conducted interviews, and administered testing to
    determine Lotter’s current intellectual and adaptive function-
    ing. In March 2018, the expert prepared a report conclud-
    ing that Lotter “qualifies for the diagnosis of Intellectual
    Developmental Disability.” Lotter attached that report to
    72
    Vela, 
    supra note 66
    , 
    279 Neb. at 149
    , 
    777 N.W.2d at 306
    .
    73
    
    Id.
    74
    
    Id. at 150
    , 
    777 N.W.2d at 306
    .
    75
    See Mata, 
    supra note 13
    .
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    his fifth postconviction motion. Among other things, the report
    states that in 2018, Lotter’s full-scale IQ was 67, which the
    expert described as “consistent with mild intellectual disabil-
    ity.” In addition to the IQ score, the report states that Lotter
    “has significant impairments in all three domains of adaptive
    functioning, including conceptual, social, and practical,” and
    that “Lotter’s problems are developmental in nature and were
    present since childhood.” The report also states that when
    Lotter was approximately 10 years old, testing by his treating
    psychologist showed a full-scale IQ of 76. The State’s briefing
    on appeal also directs us to historical evidence in the existing
    record regarding Lotter’s IQ, including a defense witness who
    testified during the sentencing phase that Lotter’s full-scale IQ
    was 92.
    (d) Lotter’s Arguments
    As stated, the district court concluded that Lotter’s Atkins
    claim is procedurally barred because it could have been raised
    in any of his prior postconviction motions after Atkins was
    decided in 2002. Additionally, the court concluded the Atkins
    claim was time barred, rejecting Lotter’s arguments it was
    timely under either § 29-3001(4)(b) or § 29-3001(4)(d).
    On appeal, Lotter challenges the district court’s conclusion
    that his Atkins claim is procedurally barred and time barred. He
    also argues that the procedural and time bars in the Nebraska
    Postconviction Act do not apply to an Atkins claim. We address
    each of Lotter’s arguments in turn.
    (i) Lotter’s Claim Not Timely
    Under § 29-3001(4)(b)
    [13-15] Under § 29-3001(4)(b), a postconviction claim is
    timely if it is filed within 1 year of the date “on which the
    factual predicate of the constitutional claim or claims alleged
    could have been discovered through the exercise of due dili-
    gence.” The factual predicate for a postconviction claim is
    properly understood as the “important objective facts” that
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    support the claim. 76 We have explained that the 1-year period
    in § 29-3001(4)(b) begins to run when the objective facts under-
    lying the claim could reasonably be discovered, and that date is
    “distinct from discovering that those facts are actionable.” 77 In
    other words, the inquiry for purposes of § 29-3001(4)(b) con-
    cerns when the important objective facts could reasonably have
    been discovered, not when the claimant should have discovered
    the legal significance of those facts. 78
    Lotter argues the factual predicate of his Atkins claim could
    not reasonably have been discovered until March 2018, when
    testing showed he had a full-scale IQ of 67 and an expert
    diagnosed him as intellectually disabled. For the same reason,
    Lotter argues he could not have raised an Atkins claim in any
    of his prior postconviction motions, and thus the claim should
    not be procedurally barred. We disagree.
    [16,17] The factual predicate for an intellectual disability
    claim under Atkins does not depend on either a formal clinical
    diagnosis or a particular IQ score. Instead, the important objec-
    tive facts supporting a claim of intellectual disability are those
    relating to the clinical diagnostic factors discussed in Atkins
    and the factors set out in § 28-105.01. As such, the factual
    predicate of an Atkins claim necessarily includes facts relating
    to subaverage intellectual functioning, 79 deficits in adaptive
    functioning, 80 and the “onset of these deficits during the devel-
    opmental period.” 81
    Our review of the existing record in this case belies
    Lotter’s argument that he could not, with reasonable diligence,
    have discovered the important objective facts supporting an
    76
    See State v. Mamer, 
    289 Neb. 92
    , 99, 
    853 N.W.2d 517
    , 524 (2014).
    77
    See 
    id.
    78
    See 
    id.
    79
    See, Atkins, 
    supra note 2
    ; Vela, 
    supra note 66
    . See, also, § 28-105.01(3).
    80
    Id.
    81
    See Hall, 
    supra note 41
    , 572 U.S. at 710.
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    Atkins claim before 2018. In Lotter’s direct appeal in 1998, we
    discussed the following expert testimony:
    Lotter has several mental disorders that have been ongo-
    ing since birth, that Lotter had those disorders at the
    time the crimes were committed, and that Lotter would
    continue to have those disorders. [A medical expert]
    described Lotter as “extremely dysfunctional” and stated
    that Lotter’s mental disorders impaired his ability to
    appreciate the wrongfulness of his conduct or to conform
    his conduct to the requirements of the law. 82
    During Lotter’s trial, the medical expert also testified there
    was a “high probability” that Lotter has “organic damage in
    the brain.” The record also shows that in 1981, at the age of
    10, Lotter received a full-scale IQ test score of 76. While such
    a score, even after being adjusted for the SEM, would still be
    above 70, and thus would not support the statutory presump-
    tion of intellectual disability under § 28-105.01(3), Lotter
    is simply wrong to suggest that an adjusted IQ score in the
    low 70s could not support a finding of intellectual disability
    in Nebraska. 83
    [18,19] The plain language of § 28-105.01(3) does not
    establish a strict cutoff IQ score of 70; rather, it creates an evi-
    dentiary presumption in favor of finding intellectual disability
    when the defendant has an IQ score of 70 or below on a reli-
    ably administered test. Moreover, unlike the Florida Supreme
    Court in Hall, this court has not construed § 28-105.01 in
    82
    Lotter, supra note 3, 255 Neb. at 516, 
    586 N.W.2d at 632
    .
    83
    See, e.g., Atkins, 
    supra note 2
    , 
    536 U.S. at
    309 n.5 (noting IQ between
    70 and 75 “is typically considered the cutoff IQ score for the intellectual
    function prong of the [intellectual disability] definition”); Vela, 
    supra note 66
    , 
    279 Neb. at 150
    , 
    777 N.W.2d at 307
     (noting expert testimony that
    under clinical standard “‘“it is possible to diagnose mental retardation in
    individuals with IQs between 70 and 75 who exhibit significant deficits in
    adaptive behavior”’”).
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    a way that would prohibit those with an IQ score above 70
    from presenting other evidence that would support a finding of
    intellectual disability. 84 Instead, as Vela recognized, Nebraska
    courts apply current clinical standards to the evidence in order
    to “reach [a] meaningful determination of whether a convicted
    defendant with an IQ in the low 70’s is a person with men-
    tal retardation.” 85
    Moreover, Lotter’s 2018 diagnosis of intellectual disabil-
    ity was based on evidence provided to the expert regarding
    significant deficits in adaptive functioning that had existed
    throughout Lotter’s childhood and young adult life. In other
    words, Lotter has been aware of the objective facts relative to
    his deficits in adaptive functioning since his childhood. Similar
    evidence of deficits in adaptive functioning was adduced dur-
    ing Lotter’s trial more than 20 years ago. And we cannot
    ignore the fact that Lotter’s current postconviction counsel,
    during the records hearing in this case, expressly advised the
    district court:
    I want to make this clear for the record. There actually
    was an effort to raise an intellectual disability claim
    after Atkins came down in this case. I don’t know if [the
    State’s counsel] is familiar with those proceedings, but it
    occurred in the context of the federal habeas proceedings.
    And there was a request to remand to the district court for
    — or to the state court for an Atkins determination. That
    ball was dropped. There were no evaluations done at that
    time and . . . counsel abandoned the effort.
    As such, we agree with the district court that Lotter could
    have discovered, through the exercise of due diligence, the fac-
    tual predicate to support a constitutional claim of intellectual
    84
    See Vela, 
    supra note 66
    .
    85
    
    Id. at 150
    , 
    777 N.W.2d at 306
    .
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    disability under Atkins long before March 2018. 86 We there-
    fore agree that Lotter’s Atkins claim is not timely under
    § 29-3001(4)(b). And for the same reason, we also agree with
    the district court that Lotter’s Atkins claim is procedurally
    barred, because he failed to raise it in his first postconvic-
    tion motion after Atkins first announced the constitutional rule
    that those with an intellectual disability are ineligible for the
    death penalty. 87
    (ii) Lotter’s Claim Not Timely
    Under § 29-3001(4)(d)
    Lotter argues that his Atkins claim is timely under
    § 29-3001(4)(d) because it was filed within 1 year after Moore
    I was decided, and he contends Moore I recognized a new con-
    stitutional rule which applies retroactively.
    Under § 29-3001(4)(d), a postconviction claim is timely
    if filed within 1 year of the “date on which a constitutional
    86
    See, e.g., In re Jones, 
    998 F.3d 187
     (5th Cir. 2021) (holding defendant
    pointed to no factual predicate discovered in prior 1-year period that
    could not have been discovered earlier through exercise of due diligence
    to support intellectual disability claim); In re Bowles, 
    935 F.3d 1210
    ,
    1221 (11th Cir. 2019) (rejecting claim that factual predicate for claim
    of intellectual disability could not have been discovered previously
    through exercise of due diligence, reasoning, “[i]f, as he claims, he is
    an intellectually disabled person, then that factual predicate has existed
    for long enough that he could have brought his Atkins claims in his first
    habeas petition”); State v. Jackson, 
    2020 Ohio 4015
    , 
    157 N.E.3d 240
    (2020) (finding successive postconviction claim based on Atkins was
    procedurally and time barred because defendant did not raise claim on
    direct appeal in 2002, in first postconviction motion in 2003, or in federal
    habeas action in 2007, and did not exercise due diligence in discovering
    facts to support intellectual disability before 2019).
    87
    See Lotter, supra note 24, 
    278 Neb. at 477
    , 771 N.W.2d at 561
    (postconviction claim of perjured testimony was procedurally barred
    because “Lotter fails to allege that this evidence was unavailable before
    any of the numerous challenges already made to his convictions and
    sentences”). See, also, Jackson, supra note 30; Marshall, 
    supra note 30
    ;
    Ortiz, 
    supra note 30
    .
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    claim asserted was initially recognized by the Supreme Court
    of the United States or the Nebraska Supreme Court, if the
    newly recognized right has been made applicable retroactively
    to cases on postconviction collateral review.” Lotter’s argu-
    ment that his Atkins claim was timely under § 29-3001(4)(d)
    requires us to determine whether Moore I recognized a new
    constitutional right which has been applied retroactively to
    cases on collateral review.
    [20] As a general principle, the U.S. Supreme Court has
    said that state courts considering a matter on collateral review
    must give retroactive effect to new substantive rules of federal
    constitutional law. 88 Substantive rules of federal constitutional
    law include “‘rules forbidding criminal punishment of certain
    primary conduct but also rules prohibiting a certain category
    of punishment for a class of defendants because of their status
    or offense.’” 89
    No one disputes that Atkins announced a new substan-
    tive rule of federal constitutional law when it held that the
    8th and 14th Amendments to the U.S. Constitution categori-
    cally prohibit imposing the death penalty on the class of
    offenders who are intellectually disabled. 90 But neither the
    U.S. Supreme Court nor this court has previously considered
    whether Moore I announced a new substantive rule of consti-
    tutional law which must be applied retroactively to cases on
    collateral review.
    88
    See Montgomery v. Louisiana, 
    577 U.S. 190
    , 200, 
    136 S. Ct. 718
    , 
    193 L. Ed. 2d 599
     (2016) (holding that “when a new substantive rule of [federal]
    constitutional law controls the outcome of a case, the Constitution requires
    state collateral review courts to give retroactive effect to that rule”). See,
    also, Teague v. Lane, 
    489 U.S. 288
    , 
    109 S. Ct. 1060
    , 
    103 L. Ed. 2d 334
    (1989).
    89
    Montgomery, supra note 88, 577 U.S. at 201, quoting Penry, 
    supra note 42
    .
    90
    Penry, 
    supra note 42
    , 
    492 U.S. at 329
     (noting “[i]f we were to hold that
    the Eighth Amendment [to the U.S. Constitution] prohibits the execution
    of mentally retarded persons . . . we would be announcing a ‘new rule’”).
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    Most state and federal courts to have considered the ques-
    tion have concluded that neither Hall nor Moore I announced
    new substantive rules of constitutional law which must be
    applied retroactively to cases on collateral review. 91 Indeed,
    one recent case described “a substantial and growing body
    of case law that has declined to apply Hall and Moore [I]
    retroactively.” 92 Generally speaking, these courts have rea-
    soned that Hall and Moore I merely adopted new procedures
    for ensuring states follow the constitutional rule announced in
    Atkins, and did not expand the class of individuals protected
    by Atkins’ prohibition against the execution of individuals who
    are intellectually disabled. 93 For example, in Phillips v. State, 94
    a case in which the U.S. Supreme Court denied a writ of cer-
    tiorari, the Florida Supreme Court reasoned that while Hall
    “more precisely defined the procedure that is to be followed in
    certain cases to determine whether a person facing the death
    penalty is intellectually disabled,” it did not expand the “cat-
    egorical prohibition on executing the intellectually disabled,”
    and was thus a mere application of the rule announced in
    91
    See, e.g., In re Richardson, 
    802 Fed. Appx. 750
     (4th Cir. 2020); In re
    Payne, 
    722 Fed. Appx. 534
     (6th Cir. 2018); Jackson, supra note 86. See,
    also, Weathers v. Davis, 
    915 F.3d 1025
     (5th Cir. 2019) (declining to apply
    Moore I retroactively); Williams v. Kelley, 
    858 F.3d 464
     (8th Cir. 2017)
    (holding Moore I did not announce substantive rule of constitutional law
    that applied retroactively to successive habeas petition); In re Henry,
    
    757 F.3d 1151
     (11th Cir. 2014) (holding Hall did not announce new
    substantive constitutional rule that must be applied retroactively to cases
    on collateral review); Phillips v. State, 
    299 So. 3d 1013
     (Fla. 2020),
    cert. denied ___ U.S. ___, 
    141 S. Ct. 2676
    , 
    210 L. Ed. 2d 837
     (2021)
    (holding Hall did not apply retroactively on state collateral review). But
    see White v. Commonwealth, 
    563 S.W.3d 1
     (Ky. 2018) (without discussing
    retroactive application of Hall or Moore I, applied both cases to conclude
    that Kentucky’s definition of intellectual disability was unconstitutional
    and remanded postconviction case for evidentiary hearing on Atkins claim
    using prevailing medical standards).
    92
    Jackson, supra note 86 (citing cases).
    93
    See cases cited supra note 91.
    94
    Phillips, supra note 91, 299 So. 3d at 1020.
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    Atkins. The Sixth 95 and Eighth Circuits 96 have adopted similar
    reasoning with respect to Moore I.
    [21] We likewise hold that neither Hall nor Moore I
    announced a new substantive rule of constitutional law that
    must be applied retroactively to cases on collateral review.
    Instead, both Hall and Moore I applied the substantive consti-
    tutional rule initially announced in Atkins and then refined the
    appropriate standards states should apply to determine whether
    an offender is intellectually disabled. Because Moore I did not
    recognize a new constitutional right which has been applied
    retroactively to cases on collateral review, that case did not
    trigger the 1-year limitations period under § 29-3001(4)(d).
    (iii) Lotter’s “Actual Innocence” Argument
    Next, Lotter argues that Nebraska’s rules governing proce-
    dural bars and time limitations in postconviction cases do not
    apply to his Atkins claim because, as someone who has been
    diagnosed as intellectually disabled, he is “actually innocent”
    of the death penalty. His argument rests on the U.S. Supreme
    Court opinion in Sawyer. 97 Before addressing Lotter’s “actual
    innocence” argument under Sawyer, we provide an overview of
    the Supreme Court’s jurisprudence in this area.
    The Supreme Court’s “actual innocence” jurisprudence
    developed in the context of claims for federal habeas corpus
    relief. In federal habeas cases, the general rule is that “claims
    forfeited under state law may support federal habeas relief
    only if the prisoner demonstrates cause for the default and
    prejudice from the asserted error.” 98 But in 1986, the Court
    stated that “in an extraordinary case, where a constitutional
    violation has probably resulted in the conviction of one who
    is actually innocent, a federal habeas court may grant the writ
    95
    In re Payne, supra note 91.
    96
    Williams, supra note 91.
    97
    Sawyer, 
    supra note 39
    .
    98
    House v. Bell, 
    547 U.S. 518
    , 536, 
    126 S. Ct. 2064
    , 
    165 L. Ed. 2d 1
     (2006).
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    even in the absence of a showing of cause for the procedural
    default.” 99 This is sometimes referred to as the “fundamental
    miscarriage of justice” exception, and it “is grounded in the
    ‘equitable discretion’ of habeas courts to see that federal con-
    stitutional errors do not result in the incarceration of innocent
    persons.” 100 Over time, the Court has discussed at least three
    types of “actual innocence” claims, each with a different legal
    standard and purpose. 101
    In Herrera v. Collins, 102 the Court considered whether a
    habeas petitioner may assert a “freestanding” constitutional
    claim of actual innocence. In that case, the petitioner sought
    habeas relief alleging that newly discovered evidence showed
    he was “actually innocent” of the crime for which he stood
    convicted. The Court found that the “fundamental miscarriage
    of justice exception” did not apply, since that exception is only
    available when the prisoner uses a claim of actual innocence
    to excuse a procedural error relating to an independent con-
    stitutional claim. 103 But Herrera nevertheless assumed without
    deciding that “in a capital case a truly persuasive demonstra-
    tion of ‘actual innocence’ made after trial would render the
    execution of a defendant unconstitutional, and warrant federal
    habeas relief if there were no state avenue open to process
    such a claim.” 104 Herrera noted the threshold showing for
    such a freestanding claim “would necessarily be extraordi-
    narily high.” 105
    99
    Murray v. Carrier, 
    477 U.S. 478
    , 496, 
    106 S. Ct. 2639
    , 
    91 L. Ed. 2d 397
    (1986).
    100
    Herrera v. Collins, 
    506 U.S. 390
    , 404, 
    113 S. Ct. 853
    , 
    122 L. Ed. 2d 203
    (1993).
    101
    See, generally, Schlup v. Delo, 
    513 U.S. 298
    , 
    115 S. Ct. 851
    , 
    130 L. Ed. 2d 808
     (1995); Herrera, 
    supra note 100
    ; Sawyer, 
    supra note 39
    .
    102
    Herrera, 
    supra note 100
    , 
    506 U.S. at 401
    .
    103
    
    Id.,
     
    506 U.S. at 404
    .
    104
    
    Id.,
     
    506 U.S. at 417
    .
    105
    
    Id.
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    In Schlup v. Delo, 106 the Court discussed using a claim of
    actual innocence as a “gateway” to obtain review of a consti-
    tutional claim that is otherwise procedurally barred under state
    law. The Court explained that a Schlup-type actual innocence
    claim is “‘not itself a constitutional claim, but instead a gate-
    way through which a habeas petitioner must pass to have his
    [or her] otherwise barred constitutional claim considered on the
    merits.’” 107 Under Schlup, if the petitioner makes a “threshold
    showing” that he or she is actually innocent of the crime, the
    court may then consider whether the otherwise procedurally
    barred constitutional claim entitles the petitioner to federal
    habeas relief. 108
    In Sawyer, the Court described a third type of actual inno-
    cence claim—a claim that a habeas petitioner is “‘actually
    innocent’ of the death penalty.” 109 A Sawyer-type actual inno-
    cence claim resembles the gateway actual innocence claim
    described in Schlup, as both are used to excuse a procedural
    default. But there is a critical difference: In a Sawyer-type
    claim, the petitioner alleges that the procedural default should
    be excused because he or she is actually innocent of the death
    penalty, rather than actually innocent of the crime itself.
    The Sawyer Court acknowledged that the “prototypical
    example” 110 of an actual innocence claim involves “the case
    where the State has convicted the wrong person of the crime,”
    and it recognized that “[i]t is more difficult to develop an
    analogous framework when dealing with a defendant who
    has been sentenced to death,” since “[t]he phrase ‘innocent
    of death’ is not a natural usage of those words . . . .” 111 But
    it nevertheless found that such a claim was permissible in
    106
    See Schlup, 
    supra note 101
    , 
    513 U.S. at 315
    .
    107
    
    Id.,
     quoting Herrera, 
    supra note 100
    .
    108
    Schlup, 
    supra note 101
    , 
    513 U.S. at 317
    .
    109
    Sawyer, 
    supra note 39
    , 
    513 U.S. at 349
    .
    110
    
    Id.,
     
    513 U.S. at 340
    .
    111
    
    Id.,
     
    513 U.S. at 341
    .
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    federal habeas cases. And in crafting the framework for actual
    innocence claims in the death penalty sentencing context,
    Sawyer focused on whether the petitioner was eligible for the
    death penalty, rather than whether the petitioner was innocent
    of the crime itself. Sawyer held that to demonstrate actual
    innocence of the death penalty, a petitioner “must show by
    clear and convincing evidence that, but for a constitutional
    error, no reasonable juror would have found the petitioner eli-
    gible for the death penalty under the applicable state law.” 112 If
    such a showing is made, the federal habeas court can consider
    the merits of the constitutional claim, despite a state proce-
    dural bar.
    Lotter correctly points out that Nebraska’s postconviction
    jurisprudence has addressed the type of freestanding “actual
    innocence” claim described in Herrera. 113 And in 2016, we
    recognized that a Herrera-style claim of actual innocence
    “may be a sufficient allegation of a constitutional violation
    under the Nebraska Postconviction Act.” 114 But even in cases
    where we have discussed a Herrera-type actual innocence
    claim, we have not once found a postconviction defendant to
    have satisfied the “extraordinarily high” showing necessary for
    an evidentiary hearing on such a claim. 115 Lotter himself has
    previously attempted to raise such an actual innocence claim,
    without success. 116
    112
    
    Id.,
     
    513 U.S. at 336
    .
    113
    See, e.g., State v. Dubray, 
    294 Neb. 937
    , 
    885 N.W.2d 540
     (2016); State
    v. Phelps, 
    286 Neb. 89
    , 
    834 N.W.2d 786
     (2013); State v. Edwards, 
    284 Neb. 382
    , 
    821 N.W.2d 680
     (2012), disapproved on other grounds, State v.
    Avina-Murillo, 
    301 Neb. 185
    , 
    917 N.W.2d 865
     (2018); Lotter, supra note
    24; State v. El-Tabech, 
    259 Neb. 509
    , 
    610 N.W.2d 737
     (2000) (Gerrard, J.,
    concurring).
    114
    Dubray, 
    supra note 113
    , 
    294 Neb. at 947
    , 885 N.W.2d at 551.
    115
    Id. at 948, 885 N.W.2d at 551.
    116
    See Lotter, supra note 24, 
    278 Neb. at 482
    , 771 N.W.2d at 564 (declining
    to decide whether Herrera-type claim of actual innocence is cognizable
    under Nebraska Postconviction Act because evidence failed to “present an
    issue of Lotter’s actual innocence”).
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    But in this case, Lotter is not asserting a freestanding
    Herrera-type actual innocence claim. Instead, he argues that
    “as a person with an intellectual disability, he is actually inno-
    cent of the death penalty and thus his claim is not subject to
    procedural default or time bars.” 117 In other words, Lotter is
    asking us to recognize a Sawyer-type claim of actual innocence
    and to allow him to proceed with his Atkins claim despite
    Nebraska’s time and procedural bar rules.
    In asking us to apply Sawyer to his postconviction motion,
    Lotter refers us to several federal cases in which habeas peti-
    tioners have raised a Sawyer-type actual innocence claim to
    argue they should be allowed to proceed on their procedurally
    barred Atkins claims because their intellectual disability ren-
    dered them ineligible for the death penalty under state law. 118
    But as we explain, recognizing an actual innocence exception
    to Nebraska’s procedural and time bar rules is a policy deci-
    sion for the Legislature. Our opinion in State v. Hessler 119
    is instructive.
    In Hessler, a defendant seeking postconviction relief urged
    us to recognize an exception to Nebraska’s procedural bar
    rules based on the U.S. Supreme Court’s decision in Martinez
    v. Ryan. 120 Martinez held that a state procedural default will
    not bar a federal habeas court from considering a substan-
    tial claim of ineffective assistance of trial counsel if, in the
    initial-review collateral proceeding, there was no counsel or
    counsel in that proceeding was ineffective. 121 We declined to
    adopt the Martinez rule as part of our postconviction jurispru-
    dence, explaining:
    Martinez did not recognize a constitutional right to
    effective assistance of postconviction counsel. Based
    117
    Reply brief for appellant at 7.
    118
    E.g., Prieto v. Zook, 
    791 F.3d 465
     (4th Cir. 2015); Frazier v. Jenkins, 
    770 F.3d 485
     (6th Cir. 2014); Sasser v. Norris, 
    553 F.3d 1121
     (8th Cir. 2009).
    119
    State v. Hessler, 
    288 Neb. 670
    , 
    850 N.W.2d 777
     (2014).
    120
    Martinez v. Ryan, 
    566 U.S. 1
    , 
    132 S. Ct. 1309
    , 
    182 L. Ed. 2d 272
     (2012).
    121
    
    Id.
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    upon principles of equity, it expanded only the types of
    cause permitting a federal habeas court to excuse a pro-
    cedural default in a federal habeas proceeding. Nothing in
    Martinez prevents state courts from enforcing procedural
    defaults in accordance with state law. 122
    Emphasizing that the Nebraska Legislature has limited state
    postconviction relief to a single proceeding, and has expressly
    authorized courts to reject successive motions, 123 Hessler con-
    cluded that whether to allow successive postconviction motions
    based on the reasoning of Martinez was a matter of policy to
    “be addressed in the first instance to the Legislature.” 124
    [22] We find our reasoning in Hessler instructive in respond-
    ing to Lotter’s request that we recognize a Sawyer-type actual
    innocence exception to Nebraska’s procedural and time bars.
    While Sawyer recognized a path for a federal habeas court to
    excuse a procedural default, it did not recognize a new consti-
    tutional rule. And we see nothing in the language of Sawyer,
    or in any subsequent Supreme Court decision, which requires
    state courts to apply the reasoning of Sawyer to excuse proce-
    dural defaults in postconviction cases, nor do we see anything
    in Sawyer which would prevent a state court from enforcing
    its procedural or time bar rules when presented with an Atkins
    claim on collateral review. Indeed, state courts have held that
    a postconviction defendant can waive an Atkins claim by fail-
    ing to follow the state’s applicable procedural rules. 125 And the
    expectation that state courts will enforce their procedural bar
    rules is the reason the Schlup and Sawyer rules were developed
    in the first instance.
    We decline Lotter’s invitation to import a Sawyer-type
    actual innocence claim into our state postconviction jurispru-
    dence. Lotter may be able to assert such a claim in a federal
    122
    Hessler, supra note 119, 288 Neb. at 680, 850 N.W.2d at 786.
    123
    See § 29-3001(3).
    124
    Hessler, supra note 119, 288 Neb. at 681, 850 N.W.2d at 787.
    125
    See, State v. Frazier, 
    115 Ohio St. 3d 139
    , 
    873 N.E.2d 1263
     (2007);
    Winston v. Com., 
    268 Va. 564
    , 
    604 S.E.2d 21
     (2004).
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    habeas proceeding, but if a Sawyer-type actual innocence
    exception to Nebraska’s procedural and time bars is to be rec-
    ognized, it will be a policy decision made by the Legislature,
    not the courts. The district court did not err in rejecting
    Lotter’s claim that he is actually innocent of the death penalty
    under Sawyer.
    (iv) § 28-105.01 Does Not Exempt
    Atkins Claims From Procedural
    and Time Bars in § 29-3001
    Finally, Lotter argues that his Atkins claim is not subject to
    the procedural or time limitations in § 29-3001 “because the
    express language of . . . § 28-105.01(2) states that the death
    penalty shall not be imposed upon any person with an intellec-
    tual disability ‘notwithstanding any other provision of law.’” 126
    In other words, Lotter contends that when a postconviction
    motion raises an Atkins claim, that claim is exempted from the
    procedural and time limitations in the Nebraska Postconviction
    Act by the statutory language in § 28-105.01(2). To the extent
    this argument has been preserved for appellate review, we find
    it to be without merit.
    [23] It is difficult to discern, from the record on appeal,
    whether this argument was presented to and passed upon by
    the district court. Generally, when the timeliness of a post-
    conviction motion is at issue, the defendant must raise all
    applicable arguments in the district court to preserve them for
    appellate review. 127 The face of Lotter’s fifth postconviction
    motion does not assert that the language of § 28-105.01(2)
    126
    Reply brief for appellant at 4 (emphasis in original).
    127
    See State v. Conn, 
    300 Neb. 391
    , 
    914 N.W.2d 440
     (2018). Accord State
    v. Stelly, 
    308 Neb. 636
    , 
    955 N.W.2d 729
     (2021) (appellate court will not
    consider issue on appeal from denial of postconviction relief that was not
    raised in motion for postconviction relief or passed upon by postconviction
    court); Munoz, 
    supra note 23
     (appellate courts do not generally consider
    arguments and theories raised for first time on appeal; in appeal from
    denial of postconviction relief, appellate court will not consider for the
    first time on appeal issues not raised in verified motion).
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    exempts an Atkins claim from the procedural and time bars set
    out in the Nebraska Postconviction Act. And we see no such
    argument presented during the records hearing in February
    2020. But the district court’s order did briefly address, and
    reject, some sort of statutory argument based on the language
    of § 28-105.01(2), reasoning that the statute recognized only
    a “statutory claim, not a constitutional claim” that would be
    cognizable under the Nebraska Postconviction Act. Assuming
    without deciding that the district court was rejecting the same
    statutory argument Lotter now asserts on appeal, we reject
    it too.
    [24,25] To consider the meaning of § 28-105.01(2), we
    apply familiar principles. When construing a statute, a court
    must determine and give effect to the purpose and intent of
    the Legislature as ascertained from the entire language of the
    statute considered in its plain, ordinary, and popular sense. 128
    Additionally, the rules of statutory interpretation require an
    appellate court to give effect to the entire language of a statute,
    and to reconcile different provisions of the statutes so they are
    consistent, harmonious, and sensible. 129 And in a previous case
    where we considered the meaning of the statutory definition of
    intellectual disability contained in § 28-105.01(3), we empha-
    sized the importance of considering “the scope of the remedy
    to which its terms apply and [giving] the statute such an inter-
    pretation as appears best calculated to effectuate the design of
    the legislative provisions.” 130
    [26] The Legislature first enacted § 28-105.01(2) in 1998, 131
    several years before Atkins announced the constitutional rule
    banning imposition of the death penalty on persons with
    an intellectual disability. As such, § 28-105.01(2) was not
    128
    Moore v. Nebraska Acct. & Disclosure Comm., 
    310 Neb. 302
    , 
    965 N.W.2d 564
     (2021).
    129
    
    Id.
    130
    Vela, 
    supra note 66
    , 
    279 Neb. at 151
    , 
    777 N.W.2d at 307
    .
    131
    See 1998 Neb. Laws, L.B. 1266, § 2.
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    enacted to codify the constitutional right recognized in Atkins.
    Rather, it was enacted to establish a statutory right in Nebraska
    prohibiting imposition of the death penalty on persons who are
    intellectually disabled. And to enforce that statutory right, the
    Legislature enacted a specific statutory procedure to allow a
    defendant facing the death penalty to file a verified motion and
    request a hearing to determine intellectual disability, before
    any sentencing determination is made. 132
    The 1998 statutory scheme also provided a procedure for
    those who had already been sentenced to death when the new
    statutory right was recognized:
    Within one hundred twenty days after the effective date
    of this act, a convicted person sentenced to the penalty
    of death prior to the effective date of this act may bring a
    verified motion in the district court which imposed such
    sentence requesting a ruling that the penalty of death be
    precluded under subsection (2) of this section and that the
    sentence be vacated. 133
    Lotter had been sentenced to death when this statute took
    effect, but he did not file a motion under this provision. In
    2013, the Legislature removed this provision from § 28-105.01
    altogether, 134 presumably because the 120-day window had
    long since expired. Currently, the only enforcement procedures
    available to defendants are those set out in § 28-105.01(4),
    and those procedures apply only to defendants who have not
    yet been sentenced to death. As such, Lotter’s opportunity to
    request a hearing to enforce the statutory right not to have the
    death penalty imposed has long since passed.
    Having waived his opportunity to pursue the statutory
    enforcement procedure previously available to him, Lotter
    132
    Id., codified at § 28-105.01(5) (Cum. Supp. 1998). See, also, § 28-105.01(4)
    (Cum. Supp. 2020).
    133
    1998 Neb. Laws, L.B. 1266, § 2, codified at § 28-105.01(4) (Cum. Supp.
    1998).
    134
    See 2002 Neb. Laws, L.B. 1, 3d Spec. Sess.
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    now asserts a constitutional claim of intellectual disabil-
    ity under Atkins, and he attempts to use language from
    § 28-105.01(2) to avoid the procedural and time bars under
    the Nebraska Postconviction Act. Specifically, Lotter argues
    that the phrase “notwithstanding any other provision of
    law” in § 28-105.01(2) should be construed as a Legislative
    “mandate[]” 135 that “renders moot” 136 the procedural and time
    limits which otherwise govern postconviction motions. We
    reject Lotter’s proposed construction.
    [27] As a general principle of statutory construction, courts
    have held that use of the phrase “notwithstanding any other
    provision of law” in a statute signals legislative intent to over-
    ride other provisions of law that conflict with the statute. 137
    We agree with this general principle, 138 but we see no conflict
    between the statutory rights and enforcement procedures set
    out in § 28-105.01 and the procedural and time limitations
    set out in the Nebraska Postconviction Act.
    135
    Reply brief for appellant at 5.
    136
    Id. at 6.
    137
    See, e.g., Cisneros v. Alpine Ridge Group, 
    508 U.S. 10
    , 18, 
    113 S. Ct. 1898
    , 
    123 L. Ed. 2d 572
     (1993) (noting that “in construing statutes, the
    use of such a ‘notwithstanding’ clause clearly signals the drafter’s intention
    that the provisions of the ‘notwithstanding’ section override conflicting
    provisions of any other section”); Conyers v. Merit Systems Protection
    Bd., 
    388 F.3d 1380
     (Fed. Cir. 2004) (holding phrase “notwithstanding any
    other provision of law” generally signals that specific statutory provision
    is to override more general conflicting statutory provisions that would
    otherwise apply to same subject); Arias v. Superior Court, 
    46 Cal. 4th 969
    ,
    983, 
    209 P.3d 923
    , 931, 
    95 Cal. Rptr. 3d 588
    , 598 (2009) (noting statutory
    phrase “notwithstanding any other provision of law” generally declares
    legislative intent to override “only those provisions of law that conflict
    with the act’s provisions—not, as defendants contend, every provision
    of law”).
    138
    See State ex rel. B.H. Media Group v. Frakes, 
    305 Neb. 780
    , 798-99, 
    943 N.W.2d 231
    , 246 (2020) (“by using the phrase ‘[n]otwithstanding any
    other provision of law,’ the Legislature demonstrated with clear intention
    that [the subject statute] should prevail when it conflicts with another
    statute”) (emphasis supplied).
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    Lotter’s argument conflates the statutory right recognized
    in § 28-105.01(2) with the constitutional right recognized in
    Atkins. But the statutory right is enforced presentence through
    the procedures set out in § 28-105.01(4), not through the
    Nebraska Postconviction Act, which exists only to remedy
    prejudicial constitutional violations that render a judgment
    void or voidable. 139
    Simply put, there is no conflict between the provisions of
    § 28-105.01(2) and the provisions of § 29-3001(4), because
    they address separate legal claims and provide separate legal
    remedies. The former applies to statutory claims of intellectual
    disability raised in a verified motion prior to the imposition of
    any sentence, and the latter applies to all constitutional claims
    raised in a verified postconviction motion by prisoners in cus-
    tody seeking to vacate or set aside their sentence.
    [28] We conclude the phrase “notwithstanding any other
    provision of law” in § 28-105.01(2) neither impacts nor over-
    rides the procedural and time limitations applicable to post-
    conviction motions under the Nebraska Postconviction Act.
    Lotter’s argument to the contrary is meritless.
    (e) Conclusion on Lotter’s Atkins Claim
    For the foregoing reasons, we agree with the district court
    that Lotter’s Atkins claim is both procedurally barred and
    time barred.
    3. Lotter’s L.B. 268 Claim
    Lotter also argues he was entitled to an evidentiary hear-
    ing on his other postconviction claim, which asserted that the
    passage, and subsequent repeal by public referendum, of L.B.
    268 140 had the effect of vacating, and then reinstating, his death
    sentences. The district court properly denied relief on this
    claim without an evidentiary hearing.
    139
    See, § 29-3001(1); Combs, 
    supra note 19
    .
    140
    See 2015 Neb. Laws, L.B. 268.
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    We described the procedural history of L.B. 268 in State
    v. Jenkins: 141
    In May 2015, the Nebraska Legislature passed 2015
    Neb. Laws, L.B. 268,—which abolished the death penalty
    in Nebraska—and then overrode the Governor’s veto of
    the bill. The Legislature adjourned sine die on May 29.
    Because L.B. 268 did not contain an emergency clause, it
    was to take effect on August 30.
    Following the passage of L.B. 268, opponents of the
    bill sponsored a referendum petition to repeal it. On
    August 26, 2015, the opponents filed with the Nebraska
    Secretary of State signatures of approximately 166,000
    Nebraskans in support of the referendum. On October
    16, the Secretary of State certified the validity of suf-
    ficient signatures. Enough signatures were verified to
    suspend the operation of L.B. 268 until the referendum
    was approved or rejected by the electors at the upcom-
    ing election. During the November 2016 election, the
    referendum passed and L.B. 268 was repealed, that is, in
    the language of the constitution, the act of the Legislature
    was “reject[ed].”
    [29,30] All of Lotter’s constitutional claims relating to
    L.B. 268 are premised on the theory that the legislation went
    into effect on August 30, 2015, and commuted his death
    sentences to life in prison, and that thereafter, the successful
    public referendum resulted in reimposition of his death sen-
    tences. But as the district court correctly recognized, we have
    rejected that theory as legally flawed in three prior cases—
    Jenkins, 142 State v. Mata, 143 and State v. Torres. 144 In Jenkins,
    we explained that L.B. 268 never actually went into effect,
    141
    Jenkins, 
    supra note 13
    , 
    303 Neb. at 706
    , 931 N.W.2d at 876-77. See, also,
    Neb. Const. art. III, § 3.
    142
    Jenkins, 
    supra note 13
    .
    143
    Mata, 
    supra note 13
    .
    144
    Torres, supra note 13.
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    because “upon the filing of a referendum petition appearing to
    have a sufficient number of signatures, operation of the leg-
    islative act is suspended so long as the verification and cer-
    tification process ultimately determines that the petition had
    the required number of valid signatures.” 145 And we expressly
    held in Jenkins, Mata, and Torres that because L.B. 268 was
    suspended and never went into effect, any death sentences in
    effect at the time were unchanged. 146
    On appeal, Lotter acknowledges that our decisions in Jenkins,
    Mata, and Torres are “adverse[]” 147 to his central premise that
    L.B. 268 vacated his death sentences and the successful public
    referendum reinstated them. Lotter’s appellate brief summarily
    states that all three cases “were wrongly decided and should be
    overruled,” 148 but he presents no argument in support, and we
    see no principled reason to revisit our settled jurisprudence on
    the issue.
    Because all of Lotter’s L.B. 268 claims are premised on the
    meritless theory that L.B. 268 vacated or changed his death
    sentences, the district court properly denied relief on these
    claims without conducting an evidentiary hearing. 149
    V. CONCLUSION
    Because Lotter’s Atkins claim is both procedurally barred
    and time barred, and because his L.B. 268 claim is meritless,
    the district court did not err in denying Lotter’s fifth successive
    motion for postconviction relief without conducting an eviden-
    tiary hearing. The judgments are affirmed.
    Affirmed.
    Freudenberg, J., not participating.
    145
    Jenkins, 
    supra note 13
    , 
    303 Neb. at 710
    , 931 N.W.2d at 879. See, also,
    Torres, supra note 13; Mata, 
    supra note 13
    .
    146
    
    Id.
    147
    Brief for appellant at 27.
    148
    
    Id.
    149
    See, Torres, supra note 13; Mata, 
    supra note 13
    ; Jenkins, 
    supra note 13
    .