Robert Walden v. David Shinn ( 2021 )


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  •                   FOR PUBLICATION
    UNITED STATES COURT OF APPEALS
    FOR THE NINTH CIRCUIT
    ROBERT LEE WALDEN,                    No. 08-99012
    Petitioner-Appellant,
    D.C. No.
    v.                   4:99-CV-00559-RCC
    DAVID SHINN, Director,
    Respondent-Appellee.              OPINION
    Appeal from the United States District Court
    for the District of Arizona
    Raner C. Collins, District Judge, Presiding
    Argued and Submitted December 15, 2020
    San Francisco, California
    Filed March 12, 2021
    Before: Sidney R. Thomas, Chief Judge, and Jay S. Bybee
    and Sandra S. Ikuta, Circuit Judges.
    Opinion by Chief Judge Thomas
    2                        WALDEN V. SHINN
    SUMMARY*
    Habeas Corpus / Death Penalty
    The panel affirmed the district court’s denial of Robert
    Lee Walden’s habeas corpus petition challenging his Arizona
    state conviction for rape and murder and his death sentence.
    The panel held that the district court properly declined to
    grant habeas relief as to Walden’s claim based on the trial
    court’s denial of his motion to sever the counts by victim,
    where Walden failed, in his first petition for post-conviction
    relief or his habeas petition, to assign any federal
    constitutional error to the Arizona Supreme Court’s
    alternative dispositive ruling that evidence concerning each
    attack would have been admissible in separate trials on each
    attack.
    The panel held that the district court properly declined to
    grant habeas relief as to Walden’s claim based on the trial
    court’s admission of eyewitness identifications. The panel
    held that the state court’s rejection of Walden’s due process
    challenge to the photographic lineup used was consistent with
    clearly established federal law and rested on factual findings
    that were objectively reasonable. The panel held that the
    state court did not rule contrary to, nor unreasonably apply,
    clearly established federal law when it determined that the
    police did not taint two victims’ identifications by informing
    each victim, after she had chosen Walden’s photo, that the
    police had a man in custody, or by providing one victim with
    *
    This summary constitutes no part of the opinion of the court. It has
    been prepared by court staff for the convenience of the reader.
    WALDEN V. SHINN                         3
    an article concerning Walden’s arrest for another assault and
    a homicide. The panel also held that the Arizona Supreme
    Court reasonably declined to infer improper police influence
    from the fact that one witness selected Walden’s photo during
    an off-the-record conversation with a detective after she had
    tentatively identified another individual as resembling one of
    two men she had seen at one victim’s apartment complex.
    Because the Arizona Supreme Court reasonably determined
    that the three identifications were not the product of
    impermissibly suggestive police procedures, there was no
    need for the panel to assess the reliability of each
    identification under the totality of the circumstances. The
    panel rejected Walden’s challenge to one victim’s
    identification insofar as it rested on a factual basis that
    Walden failed to present to the Arizona Supreme Court.
    The panel held that McKinney v. Ryan, 
    813 F.3d 798
     (9th
    Cir. 2015) (en banc), has no impact on the claim in Walden’s
    habeas petition that because the state trial court had prepared
    a special verdict before the submission of evidence, that court
    failed to properly consider his proffered mitigation evidence
    at sentencing. The panel wrote that because Walden did not
    in that claim identify causal nexus error by the Arizona
    Supreme Court, which conducted an independent review of
    Walden’s mitigation evidence, Walden’s belated claims of
    causal nexus error are not cognizable on appeal.
    The panel held that the district court properly denied
    Walden leave to amend his habeas petition to add five
    previously-withdrawn ineffective-assistance-of-counsel
    claims on the grounds that those claims are untimely and do
    not relate back to his timely-filed claims and that Walden
    unduly delayed seeking leave to amend. The panel also held
    that Walden is not entitled to equitable tolling.
    4                    WALDEN V. SHINN
    The panel held that the district court properly concluded
    that the trial court’s admission of 19 purportedly “gruesome”
    crime scene and autopsy photos does not entitle Walden to
    habeas relief because the state court’s decision did not
    involve an objectively unreasonable application of clearly
    established Supreme Court precedent or an objectively
    unreasonable determination of the facts.
    COUNSEL
    Stan S. Molever (argued), Leticia Marquez and Kori Lorick,
    Assistant Federal Public Defenders; Jon M. Sands, Federal
    Public Defender; Office of the Federal Public Defender,
    Tucson, Arizona; for Petitioner-Appellant.
    Lacey Stover Gard (argued), Chief Counsel, Capital
    Litigation Section; Mark Brnovich, Attorney General, Office
    of the Attorney General, Tucson, Arizona; for Respondent-
    Appellee.
    OPINION
    THOMAS, Chief Judge:
    Robert Lee Walden was convicted of rape and murder by
    an Arizona jury and was sentenced to death by the presiding
    state court judge. Walden appeals the district court’s denial
    of his petition for a writ of habeas corpus under 
    28 U.S.C. § 2254
    . We have jurisdiction under 
    28 U.S.C. §§ 1291
     and
    2253. We review the district court’s denial of habeas relief
    de novo, see Dixon v. Ryan, 
    932 F.3d 789
    , 795 (9th Cir.
    2019), and we affirm.
    WALDEN V. SHINN                               5
    I
    The factual and procedural history of this case spans
    nearly three decades.1 A summary of the history relevant to
    resolving the five claims before us follows.
    A
    The morning of May 4, 1991, at an apartment complex in
    Tucson, Arizona, Walden forced Vicki Blanar into an empty
    community laundry room at knife point; there, he forcibly
    removed her clothing, fondled her breasts, and raped her
    while holding his knife against her neck. See Walden, 905
    P.2d at 982. During and after the assault, he repeatedly
    threatened to kill her. See id.
    Not long after raping Blanar and at a nearby apartment
    complex during the afternoon of May 15, Walden—
    uniformed in a red shirt and blue pants—tricked Kristina
    Velasco into allowing him into her apartment, where she
    lived alone, by claiming he was there to perform maintenance
    work. See id.; see also id. at 984–85 (noting that the Blanar
    and Velasco attacks “were in the same general area”). Once
    inside, he attacked her, and a struggle followed. See id. at
    982. Walden attempted, but failed, to wrap both a telephone
    and hair dryer cord around Velasco’s neck. See id. He
    repeatedly threatened to kill Velasco if she screamed or
    continued to resist. See id. (noting that Walden told Velasco,
    “I’m going to kill you. I can do it,” when she tried to escape).
    1
    The facts of Walden’s crimes are detailed in the Arizona Supreme
    Court’s opinion affirming Walden’s convictions and sentence on direct
    appeal. See State v. Walden (Walden), 
    905 P.2d 974
    , 982–83 (Ariz. 1995).
    6                    WALDEN V. SHINN
    After dragging Velasco to her bedroom, Walden used a
    telephone cord to tie her arms behind her back. See 
    id.
     He
    then blindfolded and gagged her, fondled her breasts, pulled
    off her shoes and jeans, digitally penetrated her, and had
    forcible intercourse with her. See 
    id.
     Afterward, he ran an
    object down her back, said it was a knife, and threatened to
    kill her if she reported the rape. See 
    id.
     at 982–83.
    About a month later, on June 13 between 1:30 and
    2:30 p.m., Walden raped and killed Miguela Burhans in her
    bedroom. See 
    id. at 983
    . Burhans was home alone in an
    apartment building “next to the one where Velasco . . . was
    assaulted,” Walden v. Schriro (Walden II), No. CV 99-559-
    TUC-RCC, 
    2008 WL 2026217
    , at *2 (D. Ariz. May 9, 2008),
    and “in the same general area” as the Blanar attack. Walden,
    
    905 P.2d at 985
    . Upon arriving home, Burhans’s husband
    found his wife’s body “face down” on their bedroom floor “in
    a pool of blood, unclothed from the waist down.” 
    Id. at 983
    .
    A knife sheath and blood stains were on the bed next to
    Burhans’s body, and scattered throughout the bedroom were
    fragments of a broken clay table lamp that had previously sat
    intact on the Burhans’s nightstand.
    Burhans “died from a combination of strangulation and
    two deep cuts to her throat that severed her carotid artery.”
    
    Id. at 997
    . The stab wounds were not instantaneously fatal.
    
    Id.
     (noting that Burhans “would have been conscious for
    several minutes” after the stabbing). Blood “splattered
    around the room[] indicat[ed] that [Burhans] was moving
    about the room while injured.” 
    Id.
     The “electrical cord used
    to strangle her”—from the broken lamp—“was still around
    her neck,” and her “hand was still intertwined in it,
    demonstrating that she had been conscious when Walden
    WALDEN V. SHINN                         7
    wrapped it around her neck and was struggling to loosen it.”
    
    Id.
    Compelling evidence led to Walden’s arrest on June 27,
    1991, and subsequent indictment on July 5 for all three
    attacks: During the spring and summer of 1991, Walden
    wore a red shirt and blue pants as his daily work uniform to
    conduct termite and pest control services in homes and
    apartments around Tucson. 
    Id. at 982
    . Walden also lived
    “within blocks” of where Velasco and Burhans were
    assaulted. 
    Id. at 985
    . Most significantly, fingerprint evidence
    tied Walden to both the Velasco and Burhans crime scenes,
    while identification evidence pointed to Walden as the
    perpetrator of all three attacks. 
    Id. at 983
    , 985–86. Several
    weeks after their respective assaults, Blanar and Velasco each
    selected Walden’s photo out of the same six-person lineup.
    Not quite a month after the murder, Elaine Jordan, who had
    visited another resident at Burhans’s complex on June 13,
    identified Walden as one of two men whom she had seen at
    the complex around the time of the murder; she told law
    enforcement that this man was wearing what she thought was
    a maintenance uniform and carrying some sort of equipment
    that had a thin tube attached to it. See 
    id. at 983
    , 985–86.
    B
    After being indicted on 14 counts, including one first-
    degree murder count, Walden made and lost two pre-trial
    motions that are at issue here.
    First, Walden moved to sever the counts by victim under
    state law. He argued that the three attacks were too dissimilar
    to satisfy the standards for joinder under Arizona Rule of
    Criminal Procedure (“Rule”) 13.3(a)(2) (permitting joinder
    8                        WALDEN V. SHINN
    where the offenses were “based on the same conduct” or
    “otherwise connected together in their commission”) and
    Rule 13.3(a)(3) (permitting joinder where the offenses were
    “alleged to have been a part of a common scheme or plan”)
    and that he was, thus, entitled to severance as of right under
    Rule 13.4(b).2 He further argued that severance was
    “necessary to promote a fair determination” of his guilt or
    innocence under Rule 13.4(a). The trial court denied
    severance, but instructed the jury to “decide each charge on
    the evidence and law applicable to it uninfluenced by [its]
    decision as to the other charges.”
    Second, Walden moved to suppress the identifications
    made by Blanar, Velasco, and Jordan, arguing that the police
    procedures used to obtain them were unduly suggestive and
    would prejudice any subsequent in-court identifications, in
    violation of due process. Walden faulted law enforcement for
    using a photo array that included individuals whose features
    differed materially from the victim’s descriptions of Walden.
    Walden further contended that the police tainted the victims’
    identifications by informing them that their assailant had been
    arrested after each had selected Walden’s photo and by
    providing Velasco with an article about Walden’s arrest for
    other sexual assaults and a homicide. Walden also sought to
    undermine Jordan’s identification on the ground that she
    picked his photo only after having an off-the-record
    conversation with a detective.
    After an evidentiary hearing, the trial court also denied
    this motion. The court concluded that the lineup photos were
    2
    Under Rule 13.4(b), a defendant was “entitled as of right to sever
    offenses joined only by virtue of Rule 13.3(a)(1),” which permitted joinder
    of offenses that were “of the same or similar character.”
    WALDEN V. SHINN                         9
    “responsibly chosen”; that it was “abundantly clear” that the
    victims’ identifications did not result from “any police
    activity,” but were “instead the product of their painfully
    clear recollections of their experiences”; and that the police
    did not use “unlawful means” to obtain Jordan’s
    identification. However, the court instructed the jury that it
    could not consider any in-court identification of Walden
    unless it determined “beyond a reasonable doubt” that the
    identification “was based upon the witness’ independent
    recollection of the defendant and that it was not derived from
    suggestive circumstances in the courtroom or any previous
    pretrial identification.”
    C
    During Walden’s trial in July 1992, the jury heard nine
    days of testimony. The State’s evidence as to all three sets of
    counts was strong. Blanar and Velasco each confirmed her
    out-of-court identification of Walden and denied having any
    doubt that Walden raped her. See Walden, 
    905 P.2d at 985
    .
    In support of the Burhans’s charges, Jordan identified
    Walden, likewise without “any doubt,” as the maintenance
    man that she saw carrying blowing or spraying equipment at
    Burhans’s complex around the time of the murder. Walden’s
    boss and a coworker confirmed that Walden’s company truck
    was outfitted with pest control equipment resembling the
    equipment that Jordan had described. The State also
    introduced expert fingerprint evidence that Walden’s right
    ring finger matched a fingerprint lifted from one of the shoes
    that Velasco’s attacker had pulled off her foot before raping
    her, and that a second print lifted from the same shoe matched
    Walden’s right middle finger. The State introduced further
    expert fingerprint evidence that a print that police lifted from
    10                    WALDEN V. SHINN
    the nightstand in Burhans’s bedroom matched Walden’s left
    thumb.
    Finally, in support of the Burhans counts, Dr. John
    Howard, the forensic pathologist who visited the crime scene
    and conducted the autopsy, testified at length regarding the
    extent of Burhans’s injuries and the cause of her death: the
    “combined effects” of strangulation and two deep cuts to her
    throat by a sharp instrument, such as a knife, that severed her
    carotid artery. Dr. Howard explained these injuries with the
    aid of 19 crime scene and autopsy photos. As relevant to this
    appeal, Walden objected to the admission of these photos on
    undue prejudice grounds, given that he repeatedly offered to
    stipulate to Burhans’s injuries and the cause of her death to
    avoid their admission. See 
    id. at 989
    . The trial court
    nevertheless admitted some of the photos, reasoning that they
    were “[c]learly relevant” and that their “utility with regard to
    contested issues outweigh[ed] any tendency to create
    prejudice.” However, the trial court also excluded 52 photos,
    including—by the defense’s admission—“the most
    gruesome” ones.
    Walden’s counsel called seven witnesses to advance a
    couple defense theories, including that Walden had an alibi as
    to each set of counts, and that Blanar, Velasco, and Jordan
    must have misidentified him. In connection with the latter
    theory, Walden called an expert who testified regarding the
    fallibility of human perception and memory. In closing, the
    defense also asserted that the State’s fingerprint experts were
    mistaken.
    The afternoon following the conclusion of closing
    arguments, the jury returned guilty verdicts on all 14 counts,
    WALDEN V. SHINN                        11
    finding Walden guilty of felony, but not premeditated,
    murder. See 
    id. at 983
    .
    D
    At sentencing, the court found three aggravating factors:
    Walden (i) “had been convicted of another offense for which
    life imprisonment was imposable”; (ii) “had been convicted
    of a felony involving the use or threat of violence”; and (iii)
    murdered Burhans “in an especially cruel, heinous, or
    depraved manner.” 
    Id.
     As to the third factor, the court relied
    on Dr. Howard’s testimony and “the fact the victim’s blood
    was splattered around the room” to conclude that there was a
    protracted struggle between Walden and Burhans, during
    which he rendered her helpless; inflicted “gratuitous
    violence” on her body; and caused her substantial physical
    and mental suffering during the “several minutes of
    consciousness” that she would have experienced after Walden
    strangled and stabbed her.
    After considering the defense’s mitigation evidence, the
    court concluded that the evidence Walden “offer[ed] in
    mitigation concerning his abusive and neglectful childhood,
    being a model prisoner, his age, and his unhappy life
    experiences [were] not sufficiently substantial to call for
    leniency,” and sentenced Walden to death. 
    Id. at 999
    .
    E
    In a reasoned opinion, the Arizona Supreme Court
    affirmed Walden’s convictions and sentences. 
    Id. at 982
    . As
    is relevant here, Walden raised, but did not prevail on, the
    following issues in his direct appeal: (i) the denial of
    severance deprived him of a fundamentally fair trial on the
    12                       WALDEN V. SHINN
    Burhans counts; (ii) the admission of the Blanar, Velasco, and
    Jordan identifications, which were both unreliable and the
    product of unduly suggestive police procedures, further
    violated his due process rights; (iii) the admitted crime scene
    and autopsy photos further violated his due process rights
    because they were neither relevant to any contested issue at
    trial, nor “necessary” to illustrate the medical examiner’s
    testimony, so their only effect was to “inflame the jury”; and
    (iv) the trial court’s failure to properly consider Walden’s
    proffered mitigation, including his father’s criminal history,
    “which may well have caused [his] conduct,” “because of a
    previously formed decision to impose the death penalty,”
    violated Eddings v. Oklahoma, 
    455 U.S. 104
     (1982).3 See
    Walden, 
    905 P.2d at
    984–86, 989–90, 998–99.
    In affirming Walden’s death sentence, the Arizona
    Supreme Court conducted an independent review of
    Walden’s mitigation evidence. 
    Id. at 999
    . The court
    concluded that Walden’s “difficult family background” was
    “not a mitigating circumstance” because Walden did “not
    explain how this had anything at all to do with the rapes and
    the murder.” 
    Id.
     (citing State v. Wallace, 
    773 P.2d 983
    , 986
    (Ariz. 1989), for the rule that “[a] difficult family background
    is a relevant mitigating circumstance if a defendant can show
    that something in that background had an effect or impact on
    his behavior that was beyond the defendant’s control”).
    3
    Eddings holds that a sentencer may “not be precluded from
    considering, as a mitigating factor, any aspect of a defendant’s character
    or record and any of the circumstances of the offense that the defendant
    proffers as a basis for a sentence less than death.” Id. at 110 (quoting
    Lockett v. Ohio, 
    438 U.S. 568
    , 604 (1978)).
    WALDEN V. SHINN                        13
    F
    On April 15, 1996, Walden’s convictions and sentences
    became final when the United States Supreme Court denied
    his petition for certiorari. See Walden v. Arizona, 
    517 U.S. 1146
     (1996) (Mem.). Fifteen days later, Walden filed his first
    notice for post-conviction relief (“PCR”) in state court.
    Overlapping and long-running state PCR and federal habeas
    proceedings followed.
    1
    After Walden filed his first state PCR petition, raising
    arguments that are not at issue here, Walden filed a first
    amended PCR petition which sought relief based solely on
    the denial of severance. Relying on an intervening change in
    Arizona law concerning the proper interpretation of Arizona’s
    joinder and severance rules, Walden argued that the Arizona
    Supreme Court erred in relying on a test, since overruled as
    a matter of state law, to uphold the denial of severance in his
    case. He further contended that: (1) the high court erred
    under state evidentiary law in holding, in the alternative, that
    the denial of severance did not prejudice him because the
    evidence concerning each victim would have been cross-
    admissible in separate trials on each set of counts, see
    Walden, 
    905 P.2d at 985
     (“In any event, even if severed, each
    of the sexual assaults would have been admissible in the
    separate trials.”); (2) Walden’s appellate counsel did not
    adequately brief the severance issue; and (3) joinder
    prejudiced Walden on appeal because it “forced” appellate
    counsel to “devote a significant portion of his brief to argue
    issues on the non-capital offenses.”
    14                    WALDEN V. SHINN
    The PCR court dismissed the amended petition. It
    concluded, inter alia, that the Arizona Supreme Court’s
    alternative cross-admissibility ruling was correct as a matter
    of state law because the other crimes evidence would have
    been admissible on the questions of “mistaken identity and
    alibi.” The Arizona Supreme Court denied review in October
    1999.
    2
    In November 1999, Walden initiated federal habeas
    proceedings in the United States District Court for the District
    of Arizona by filing a pro se petition. The court appointed
    the Federal Public Defenders as counsel, and issued two
    orders directing that the amended petition “include all known
    claims of constitutional error or deprivation.”
    Walden filed his amended habeas petition (the
    “operative” or “original” petition) on August 16, 2000. That
    petition raised dozens of claims. Nine remain at issue in the
    instant appeal. As on direct appeal in state court, Walden
    asserted constitutional violations arising from the trial court’s
    (i) denial of severance; (ii) admission of the Blanar, Velasco,
    and Jordan identifications; (iii) admission of “gruesome”
    crime scene and autopsy photos that were “neither relevant to
    a disputed issue at trial regarding the cause of death, sequence
    of events, premeditation or any other theory of the case” nor
    “necessary to illustrate medical testimony regarding the
    victim’s injuries”; and (iv) purported failure to consider all of
    Walden’s proffered mitigation (“Claim 31”). In connection
    with the severance claim, Walden’s amended habeas petition,
    unlike his amended PCR petition, did not assign error to the
    Arizona Supreme Court’s alternative basis for upholding the
    WALDEN V. SHINN                        15
    denial of severance—the evidence would have been cross-
    admissible in separate trials under state law.
    In the amended petition, Walden also presented, for the
    first time, five ineffective assistance of counsel (“IAC”)
    claims. He alleged that trial counsel was ineffective in (v)
    opening the door to the admission of Velasco’s 911 call
    reporting the rape and for failing to object to that call’s
    admission on prejudice grounds, and (vi) opening the door to
    the admission of the 911 call that Burhans’s husband placed
    after discovering her dead body and for failing to object to
    that call’s admission on prejudice grounds. Walden further
    alleged that sentencing counsel was ineffective for failing to
    (vii) show the causal connection between the mitigation
    presented and Walden’s crimes; (viii) object to, move for a
    continuance based on, or show the causal connection
    between his father’s criminal history and his crimes; and
    (ix) thoroughly investigate and present mitigation evidence.
    On October 16, 2000, Walden filed a court-ordered
    statement of exhaustion, identifying “when and where each
    ground of relief raised in the amended habeas petition was
    presented in the state courts.” That same day, Walden,
    without seeking the court’s leave, withdrew, inter alia, the
    five IAC claims enumerated above from his petition. His
    withdrawal notice explained that he was presenting those
    claims in state court. Consistent with that representation, his
    federal habeas counsel simultaneously filed a second PCR
    notice in state court listing the withdrawn claims.
    3
    Back in state court, Walden, represented by new PCR
    counsel, did not file his second PCR petition presenting the
    16                      WALDEN V. SHINN
    withdrawn IAC claims until January 29, 2002.4 The PCR
    court dismissed that petition in July 2002, concluding that
    (i) Walden’s newly-presented mitigation evidence did not
    “show by clear and convincing evidence that no reasonable
    judge would have sentenced him to death”; and (ii) Walden’s
    IAC claims were “precluded” because they should have
    been raised in his first PCR proceeding under Arizona
    Rule of Criminal Procedure 32.2(a)(3). Walden sought
    reconsideration of the first, but not the second, conclusion,
    and the PCR court denied his motion. On April 21, 2004, the
    Arizona Supreme Court denied review.
    4
    Three months after the state PCR proceedings on his
    withdrawn IAC claims concluded and nearly four years after
    he had withdrawn those claims from his habeas petition,
    Walden moved for leave to amend his habeas petition to
    reintroduce those claims. In March 2005, the district court
    denied his motion, holding both that amendment would be
    futile and that Walden had unduly delayed seeking
    amendment. With respect to futility, the court explained that
    Walden procedurally defaulted his IAC claims because he did
    not raise them in his initial state PCR proceedings and that
    PCR counsel’s IAC could not excuse the default under then-
    prevailing Supreme Court precedent. See Coleman v.
    Thompson, 
    501 U.S. 722
    , 755 (1991). As to undue delay, the
    court disagreed with Walden’s representation that he had no
    choice but to withdraw his unexhausted IAC claims. The
    court reasoned that the claims “were not truly ‘unexhausted,’”
    4
    Walden filed a proposed oversized petition on November 5, 2001,
    with a motion to expand the page limit from 40 pages to 108 pages. The
    PCR court denied the motion in December 2001.
    WALDEN V. SHINN                       17
    but rather “‘technically exhausted’ [and] procedurally
    defaulted”; therefore, Walden should have left the claims in
    the petition and briefed whether he could “overcome any
    alleged default of the Withdrawn Claims.” Instead of
    “comply[ing] with th[e] [c]ourt’s order to include all of his
    known claims in his Amended Petition,” Walden, “without
    leave of the [c]ourt,” “withdr[ew] the claims and file[d] a
    successive [PCR] petition.” Four years later, he sought “to
    add them again in the same procedural posture as when they
    were withdrawn—procedurally defaulted.” Based on this
    history, the court found that Walden “made a tactical decision
    to circumvent the process established by the rules and th[e]
    [c]ourt,” establishing undue delay.
    After the parties briefed the merits of the exhausted
    claims, the district court denied relief. See Walden II, 
    2008 WL 2026217
    , at *44. The court rejected, as relevant here,
    Walden’s challenges to: (i) the denial of severance; (ii) the
    admission of the Blanar, Velasco, and Jordan identifications;
    (iii) the admission of the crime scene and autopsy photos; and
    (iv) the trial court’s purported failure to consider Walden’s
    mitigation evidence at sentencing. See 
    id.
     at *4–12, 19–21,
    37–39.
    5
    While Walden’s appeal from the district court’s denial of
    habeas relief was pending in this Court, the Supreme Court
    decided Martinez v. Ryan, 
    566 U.S. 1
     (2012), which
    “qualifie[d] Coleman” by holding that PCR counsel’s IAC “at
    initial-review collateral proceedings may establish cause for
    a prisoner’s procedural default of a claim of ineffective
    assistance at trial.” 
    Id. at 9
    . Several months later, Walden
    moved this Court for a limited remand to permit the district
    18                   WALDEN V. SHINN
    court to reconsider his IAC claims in light of Martinez. A
    motions panel granted the limited remand as to the five IAC
    claims at issue here.
    Subsequently, a two-judge panel of this Court, at the
    district court’s request, expanded the limited remand to
    include consideration of whether Walden’s petition was
    affected by McKinney v. Ryan, 
    813 F.3d 798
    , 809 (9th Cir.
    2015) (en banc) (holding that the Arizona Supreme Court
    applied an unconstitutional “causal nexus” test to non-
    statutory mitigation evidence by refusing to consider, “as a
    matter of state law,” such evidence unless it was causally
    connected to the defendant’s crime).
    6
    During the remand proceedings, Walden sought to excuse
    the procedural default of his five IAC claims under Martinez,
    but the State countered that there was no need to run the
    Martinez analysis because those claims were untimely under
    AEDPA’s one-year statute of limitations, see 
    28 U.S.C. § 2244
    (d)(1), and did not satisfy Federal Rule of Civil
    Procedure (“Rule”) 15(c)’s relation-back standard for
    amending outside the limitations period. In reply, Walden
    argued that the proposed claims did relate back to certain
    claims in his operative petition and, alternatively, that
    applying Rule 15(c) to deny federal review of his claims
    would be “inequitable” under Martinez.
    Reconsidering its 2005 denial of leave to amend, the
    district court agreed with the State that amendment remained
    futile. The court explained that Walden’s proposed IAC
    claims were untimely under AEDPA and that Walden could
    not avoid the time bar because he did not invoke “any
    WALDEN V. SHINN                         19
    grounds for equitable tolling,” and his proposed claims did
    not relate back to any of his timely claims. The court also
    reaffirmed its prior finding “regarding [Walden’s] tactical
    decision to circumvent th[e] [c]ourt’s process” by
    withdrawing his IAC claims, “resulting in undue delay.”
    In the same order, the court further rejected Walden’s
    argument that McKinney compels relief on Claim 31 of his
    operative petition. The court observed that Claim 31 did not
    allege that the trial court or the Arizona Supreme Court
    refused to consider Walden’s proffered mitigation under the
    causal nexus test at issue in McKinney. Thus, the causal
    nexus claim presented for the first time in Walden’s
    supplemental briefing on remand was untimely.
    7
    In its two orders denying habeas relief, the district court
    granted a certificate of appealability with respect to the denial
    of severance (“Claim 1”), see Walden II, 
    2008 WL 2026217
    ,
    at *44; the challenged identifications (“Claim 2”), see id.; and
    the resolution of Claim 31 regarding the trial court’s
    consideration of mitigation evidence (“Claim 3” on appeal).
    We expanded the certificate to include two additional issues:
    whether the district court erred in denying relief on the five
    IAC claims remanded for reconsideration in light of Martinez
    (“Claim 4”), and on the claim concerning the crime scene and
    autopsy photos (“Claim 5”).
    II
    Walden’s habeas petition is subject to review under the
    Antiterrorism and Effective Death Penalty Act of 1996
    (“AEDPA”). See Murray v. Schriro, 
    745 F.3d 984
    , 996
    20                   WALDEN V. SHINN
    (9th Cir. 2014). AEDPA limits “the availability of federal
    habeas relief” for “claims previously ‘adjudicated on the
    merits’ in state-court proceedings.’” Harrington v. Richter,
    
    562 U.S. 86
    , 92 (2011). A habeas petitioner cannot secure
    relief on such claims unless the state court’s adjudication:
    (1) resulted in a decision that was contrary to,
    or involved an unreasonable application of,
    clearly established Federal law, as determined
    by the Supreme Court of the United States; or
    (2) resulted in a decision that was based on an
    unreasonable determination of the facts in
    light of the evidence presented in the State
    court proceeding.
    
    28 U.S.C. § 2254
    (d).
    Under § 2254(d), a state prisoner “must show that the
    state court’s ruling on the claim being presented in federal
    court was so lacking in justification that there was an error
    well understood and comprehended in existing law beyond
    any possibility for fairminded disagreement.” Harrington,
    
    562 U.S. at 103
    . “[C]learly established federal law,” within
    the meaning of § 2254(d)(1), is “limited to Supreme Court
    authority that ‘squarely addresses’ the claim at issue and
    provides a ‘clear answer.’” Yun Hseng Liao v. Junious, 
    817 F.3d 678
    , 689 (9th Cir. 2016) (quoting Wright v. Van Patten,
    
    552 U.S. 120
    , 125–26 (2008) (per curiam)). And “an
    unreasonable application of federal law is different from an
    incorrect application of federal law.” Harrington, 
    562 U.S. at 101
     (citation omitted). Similarly, under § 2254(d)(2), a
    state court’s factual determination is “not unreasonable
    merely because the federal habeas court would have reached
    WALDEN V. SHINN                         21
    a different conclusion.” Wood v. Allen, 
    558 U.S. 290
    , 301
    (2010). Section 2254(d)(2) requires federal courts to “accord
    the state trial court substantial deference.” Brumfield v. Cain,
    
    576 U.S. 305
    , 314 (2015). “A state court’s factual findings
    are unreasonable if ‘reasonable minds reviewing the record’
    could not agree with them.” Ayala v. Chappell, 
    829 F.3d 1081
    , 1094 (9th Cir. 2016) (quoting Brumfield, 576 U.S. at
    314).
    Last, AEDPA prohibits federal courts from granting
    habeas relief on claims for which the petitioner has not
    “exhausted the remedies available in the courts of the State.”
    
    28 U.S.C. § 2254
    (b)(1)(A). “Exhaustion requires that a
    petitioner fairly present his federal claims to the highest state
    court available.” Davis v. Silva, 
    511 F.3d 1005
    , 1008 (9th
    Cir. 2008) (cleaned up). In turn, “[f]air presentation requires
    that the petitioner describe in the state proceedings both the
    operative facts and the federal legal theory on which his claim
    is based so that the state courts have a fair opportunity to
    apply controlling legal principles to the facts bearing upon his
    constitutional claim.” 
    Id. at 1009
     (quotation marks omitted);
    accord Robinson v. Schriro, 
    595 F.3d 1086
    , 1101 (9th Cir.
    2010) (exhaustion requires “present[ing] both the factual and
    legal basis for the claim”).
    III
    Applying these principles, we agree with the district court
    that Walden is not entitled to habeas relief on any of his
    claims.
    22                     WALDEN V. SHINN
    A
    The district court properly declined to grant habeas relief
    as to Claim 1, which was based on the trial court’s denial of
    severance. See Walden II, 
    2008 WL 2026217
    , at *4–5.
    Given the Arizona Supreme Court’s alternative ruling that
    evidence concerning each attack would have been admissible
    in separate trials on each attack, see Walden, 
    905 P.2d at 985
    ,
    and Walden’s failure to assign any federal constitutional error
    to that dispositive ruling in his first PCR petition or his
    habeas petition, we affirm the denial of habeas relief as to
    Claim 1.
    1
    As a preliminary matter, we have made clear that the
    Supreme Court’s observation in United States v. Lane, 
    474 U.S. 438
    , 446 n.8 (1986), that “misjoinder would rise to the
    level of a constitutional violation only if it results in prejudice
    so great as to deny a defendant his Fifth Amendment right to
    a fair trial” is dicta and does not “establish a constitutional
    standard binding on the states.” Collins v. Runnels, 
    603 F.3d 1127
    , 1131 (9th Cir. 2010). The State accordingly argues that
    Walden’s claim for habeas relief is barred by the absence of
    clearly established federal law. Walden, in turn, asserts that
    AEDPA is inapplicable because the state courts failed to
    address the federal constitutional standard when denying his
    joinder claim. We decline to resolve this dispute, as even
    under the standards we have developed for analyzing joinder
    challenges, Walden is not entitled to relief.
    “We may grant habeas relief on a joinder challenge only
    if the joinder resulted in an unfair trial.” Davis v. Woodford,
    
    384 F.3d 628
    , 638 (9th Cir. 2004) (quotation marks omitted).
    WALDEN V. SHINN                          23
    “The requisite level of prejudice is reached only if the
    impermissible joinder had a substantial and injurious effect or
    influence in determining the jury’s verdict.” 
    Id.
     (quotation
    marks omitted). In evaluating the prejudice due to joinder (if
    any), we “focus[] particularly on cross-admissibility of
    evidence,” id.—that is, whether evidence of an offense would
    be admissible in a separate trial on another offense, and vice
    versa. A finding of “cross-admissibility dispels the
    prejudicial impact of joining all counts in the same trial” for
    the simple reason that “[t]he jury would have heard the
    evidence in any event.” Sandoval v. Calderon, 
    241 F.3d 765
    ,
    772 (9th Cir. 2000); see also Davis, 
    384 F.3d at
    638–39
    (denying habeas relief on a joinder challenge where, inter
    alia, the evidence in support of both non-capital and capital
    charges was “cross-admissible on the issues of identity and
    intent”).
    2
    On direct appeal, the Arizona Supreme Court held that the
    trial court did not abuse its discretion in declining to sever the
    counts by victim because there were sufficient similarities
    among the three attacks to permit joinder under the relevant
    state rules of criminal procedure. Walden, 
    905 P.2d at
    984–85 (citing Ariz. R. Crim. Proc. 13.3(a)(3), 13.4(b)). The
    court held, in the alternative, that “even if severed, each of the
    sexual assaults would have been admissible in the separate
    trials.” 
    Id.
     at 985 (citing State v. Day, 
    715 P.2d 743
    , 747
    (Ariz. 1986) (“Since evidence of [other assaults] would have
    been admissible at separate trials, had they been granted,
    severance would not have ameliorated any prejudice faced by
    the appellant. Therefore, the trial court did not err by
    refusing to grant severance.”)). The alternative cross-
    admissibility holding forecloses Walden’s argument that
    24                    WALDEN V. SHINN
    joinder rendered his trial fundamentally unfair. See Sandoval,
    241 F.3d at 772.
    Bean v. Calderon, 
    163 F.3d 1073
     (9th Cir. 1998), is not
    to the contrary. In Bean, we concluded that the joinder of two
    murder cases, one of which was stronger than the other,
    deprived the petitioner of a fair trial on the weaker case. 
    Id. at 1083
    . Unlike this case, however, the California Supreme
    Court in Bean concluded that the evidence at issue was not
    cross-admissible. 
    Id.
     Thus, Bean is clearly distinguishable.
    3
    Whether the Arizona Supreme Court’s cross-admissibility
    ruling was contrary to or involved an unreasonable
    application of clearly established federal law is not before us.
    Walden never assigned any federal error to that ruling in his
    first state PCR proceedings. Nor did he so much as mention
    the cross-admissibility ruling in either his habeas petition, or
    his opening merits brief in support of his petition. It was not
    until his reply brief that Walden contested the cross-
    admissibility determination, and he did so under only state
    law.
    Because Walden did not challenge the cross-admissibility
    ruling on federal grounds in his state PCR proceedings, we
    must refrain from reviewing that issue. See 
    28 U.S.C. § 2254
    (b)(1)(A); Duncan v. Henry, 
    513 U.S. 365
    , 366 (1995)
    (per curiam) (“If a habeas petitioner wishes to claim that an
    evidentiary ruling . . . denied him the due process of law
    guaranteed by the Fourteenth Amendment, he must say so . . .
    in state court.”); see also 
    28 U.S.C. § 2254
    (b)(3) (“A State
    shall not be deemed to have waived the exhaustion
    requirement or be estopped from reliance upon the
    WALDEN V. SHINN                                 25
    requirement unless the State, through counsel, expressly
    waives the requirement.”). Further, Walden forfeited any
    such challenge by omitting it from his habeas petition. See
    Robinson v. Kramer, 
    588 F.3d 1212
    , 1217 (9th Cir. 2009)
    (“Habeas claims that are not raised before the district court in
    the petition are not cognizable on appeal.” (quoting
    Cacoperdo v. Demosthenes, 
    37 F.3d 504
    , 507 (9th Cir.
    1994)); Rhoades v. Henry, 
    598 F.3d 495
    , 501 (9th Cir. 2010)
    (holding that because the petitioner failed to raise a Brady
    claim in his amended petition, “the claim is waived”).5
    B
    The district court also properly declined to grant habeas
    relief as to claim 2, which was based on the trial court’s
    admission of the Blanar, Velasco, and Jordan identifications.
    See Walden II, 
    2008 WL 2026217
    , at *5–12. Contrary to
    Walden’s arguments on appeal, the state court’s rejection of
    this claim was not contrary to, or an unreasonable application
    of, clearly established federal law, nor did it rest on an
    unreasonable determination of the facts.
    5
    Although Walden challenged the cross-admissibility determination
    on state law grounds in his first amended PCR petition, the district court
    properly declined to review that ruling. See Walden II, 
    2008 WL 2026217
    , at *5. Because “it is not the province of a federal habeas court
    to reexamine state-court determinations on state-law questions,” Estelle
    v. McGuire, 
    502 U.S. 62
    , 67–68 (1991), we likewise decline to consider
    whether the state court erred as a matter of state law in concluding that the
    evidence regarding each victim would have been cross-admissible in three
    separate trials. See Park v. California, 
    202 F.3d 1146
    , 1149 (9th Cir.
    2000) (declining to reach a habeas petitioner’s contention that “under
    California law, the crimes should not have been consolidated [where]
    evidence relevant to one set of counts would not have been admissible at
    a separate trial on the other set of counts” because “a violation of state law
    standing alone is not cognizable in federal court on habeas”).
    26                   WALDEN V. SHINN
    1
    Under clearly established federal law (now and at the time
    that the Arizona Supreme Court rendered its decision), a due
    process challenge to eyewitness identifications is subject to
    a two-step inquiry: First, a court must decide “whether the
    police used an unnecessarily suggestive identification
    procedure.” Perry v. New Hampshire, 
    565 U.S. 228
    , 235
    (2012). Second, if there was “improper police conduct,” the
    court must then decide whether such police conduct “created
    a substantial likelihood of misidentification.” 
    Id. at 239
    (cleaned up). “Reliability of the eyewitness identification is
    the linchpin of [this] evaluation.” 
    Id.
     (cleaned up); see also
    Neil v. Biggers, 
    409 U.S. 188
    , 198–199 (1972) (explaining
    that “unnecessary suggestiveness alone” does not “require[]
    the exclusion of evidence”); Manson v. Brathwaite, 
    432 U.S. 98
    , 106 (1977) (“The admission of testimony concerning a
    suggestive and unnecessary identification procedure does not
    violate due process so long as the identification possesses
    sufficient aspects of reliability.”).
    The first step focuses on police conduct. See Perry, 
    565 U.S. at 232
    . If the police did not “arrange[] suggestive
    circumstances leading the witness to identify a particular
    person as the perpetrator,” the inquiry ends. Id.; see also
    United States v. Bagley, 
    772 F.2d 482
    , 492 (9th Cir. 1985)
    (“If we find that a challenged procedure is not impermissibly
    suggestive, our inquiry into the due process claim ends.”).
    The Supreme Court has identified some of the ways in
    which an identification procedure may be unduly suggestive.
    For example, a police-designed lineup that features
    individuals “grossly dissimilar in appearance to the suspect”
    is improperly suggestive. Perry, 
    565 U.S. at 243
     (quoting
    WALDEN V. SHINN                              27
    United States v. Wade, 
    388 U.S. 218
    , 233 (1967)); see also
    Bagley, 
    772 F.2d at 493
     (explaining that such lineups
    “emphasize the focus upon a single individual,” thereby
    “increas[ing] the danger of misidentification” (citing
    Simmons v. United States, 
    390 U.S. 377
    , 382–83 (1968))).
    The corollary to this principle, as we have explained, is
    that “[m]ere variations in appearance among persons or
    photographs presented to a witness do not automatically
    invalidate a pretrial identification.” United States v.
    Robertson, 
    606 F.2d 853
    , 857 (9th Cir. 1979); see also United
    States v. Love, 
    746 F.2d 477
    , 479 (9th Cir. 1984) (per curiam)
    (holding that a photographic lineup procedure was not
    impermissibly suggestive where “all of the photographs were
    reasonably similar in appearance to Love”). Certain police
    commentary before and during an identification procedure
    may also amount to “improper suggestion,” such as when the
    police tell the witness “that they have caught the culprit after
    which the defendant is brought before the witness alone or is
    viewed in jail” or when the police “point[] out” the suspect
    “before or during a lineup.” Perry, 
    565 U.S. at 243
     (quoting
    Wade, 
    388 U.S. at 233
    ).
    2
    The state court’s rejection of Walden’s due process
    challenge to the photographic lineup used with Blanar,
    Velasco, and Jordan was consistent with the foregoing
    principles and rested on factual findings that were objectively
    reasonable.6
    6
    Under Johnson v. Williams, 
    568 U.S. 289
    , 298–99 (2013), we
    presume that the state court adjudicated Walden’s federal challenge to the
    identification procedures on the merits. Even though the state court did
    28                       WALDEN V. SHINN
    First, the Arizona Supreme Court identified the correct
    legal standard governing the suggestiveness of photographic
    lineups: “The law only requires that line-ups depict
    individuals who basically resemble one another such that the
    suspect’s photograph does not stand out.” Walden, 
    905 P.2d at 985
     (cleaned up); compare 
    id.
     with Perry, 
    565 U.S. at 243
    (explaining that “[i]mproper suggestion” occurs when lineups
    feature individuals “grossly dissimilar in appearance to the
    suspect” (quoting Wade, 
    388 U.S. at 233
    ) (emphasis added)).
    Next, the Arizona Supreme Court concluded that Walden’s
    photo (number 5) did not stand out because, as a factual
    matter, “those shown resembled one another. All were
    similar in age, build, hair color, and hair length,” and “[t]he
    fact that two had blue eyes and different complexions [wa]s
    inconsequential.” Walden, 
    905 P.2d at 985
    .
    The record shows that it was not objectively unreasonable
    for the Arizona Supreme Court to conclude that the photos
    generally resemble one another and the lineup was not
    suggestive. Id.; see also Love, 
    746 F.2d at 479
     (rejecting, on
    direct appeal, Love’s suggestive identification challenge to a
    photo lineup where “all of the photo[s] were reasonably
    similar in appearance to Love” (emphasis added)). To the
    extent there are differences between Walden and the other
    not expressly cite federal precedent in rejecting that challenge, see
    Walden, 
    905 P.2d at
    985–86, Walden cannot rebut this presumption
    because Arizona’s two-step test for determining whether such procedures
    are impermissibly suggestive “mirrors” the constitutional analysis. Day,
    
    715 P.2d at 748
    ; see also Walden, 
    905 P.2d at
    985 (citing Day, 
    715 P.2d at 748
    ); Kipp v. Davis, 
    971 F.3d 939
    , 950 (9th Cir. 2020) (explaining that
    the Johnson presumption is appropriate where “the line of state precedent
    could be viewed to fully incorporate a related federal constitutional
    right”).
    WALDEN V. SHINN                        29
    five men pictured in the lineup, they are too subtle to amount
    to improper suggestion. See Robertson, 
    606 F.2d at 857
    .
    At least five of the six men are obviously white (numbers
    2, 3, 4, 5, and 6); at least four of the six men appear to be in
    the same age range (numbers 1, 3, 5, and 6); and at least four
    of the six men appear to have similar skin and hair coloring
    as well as hair length and type (numbers 3, 4, 5, and 6).
    Given the lack of “gross[] dissimilar[ity]” in the photo array,
    Perry, 
    565 U.S. at 243
    , we cannot agree that the Arizona
    Supreme Court unreasonably rejected Walden’s argument
    that the police “arranged [the array] as to make” Walden’s
    identification “virtually inevitable.” Cf. Foster v. California,
    
    394 U.S. 440
    , 443 (1969); see also United States v. Beck, 
    418 F.3d 1008
    , 1012 (9th Cir. 2005) (rejecting, on direct review,
    a claim that the composition of a photospread was improperly
    suggestive where “all six of the pictures [we]re of Caucasian
    males in the same age range, with similar skin, eye, and hair
    coloring”; “[f]our of the six photos show[ed] men with
    similar length hair, with two having somewhat shorter hair”;
    and five of the photographed men were “clean-shaven”).
    3
    The state court did not rule contrary to, nor unreasonably
    apply, clearly established federal law when it determined that
    the police did not taint Blanar’s and Velasco’s identifications
    by informing each victim, after she had chosen Walden’s
    photo, that the police had a man in custody, or by providing
    Velasco with an article concerning Walden’s arrest for
    another assault and a homicide. See Walden, 
    905 P.2d at 985
    (“We have . . . consistently held that when the identification
    procedure is not suggestive in the first place, such subsequent
    30                    WALDEN V. SHINN
    comments do not taint the initially fair procedure.” (citation
    omitted)).
    The record supports this conclusion. Before Blanar
    viewed the lineup, the officer administering the lineup told
    her that she did not have to identify anyone. After Blanar
    selected Walden’s photo and repeatedly said, “That’s him,”
    the officer told Blanar that the man who assaulted her was in
    custody. However, the officer did not tell Blanar she had
    picked the “right guy.” Likewise, before Velasco viewed the
    photo array, the officer administering the lineup reminded her
    that there was no need to identify anyone, and it was just as
    important to free innocent persons of suspicion. After
    Velasco selected Walden’s photo, the officer told her that
    “he” was in jail, but did not tell Velasco that she had picked
    the “right guy.” The officer gave Velasco an article about
    Walden’s arrest for other crimes, but it did not include a
    picture of him, see 
    id.,
     and the officer did not inform Velasco
    that police had matched a fingerprint on a shoe that she had
    been wearing during the assault to Walden.
    On this record, the state court reasonably concluded that
    the police’s post-identification remarks and conduct did not
    constitute “improper suggestion.” Perry, 
    565 U.S. at 243
    (explaining that “improper suggestion” occurs where the
    police tell the witness “that they have caught the culprit after
    which the defendant is brought before the witness alone or is
    viewed in jail” or when the police “point[] out” the suspect
    “before or during a lineup” (quoting Wade, 
    388 U.S. at 233
    )
    (emphasis added)); cf. also United States v. Bowman, 
    215 F.3d 951
    , 966 (9th Cir. 2000) (rejecting, on direct appeal,
    suggestive identification claim where “[t]he witnesses were
    told that they need not make an identification if they were not
    confident”); Love, 
    746 F.2d at 479
     (rejecting, on direct
    WALDEN V. SHINN                       31
    appeal, suggestive identification claim where “each time [the
    witness] was shown a lineup, she was told that the robber
    might or might not be included and that she should not feel
    compelled to make an identification”).
    4
    The Arizona Supreme Court reasonably declined to infer
    improper police influence from the fact that Jordan selected
    Walden’s photo during a two-minute off-the-record
    conversation with a detective after she had tentatively
    identified another individual as resembling one of two men
    she had seen at Burhans’s complex on June 13. See Walden,
    
    905 P.2d at 985
     (reaching this conclusion after “listening to
    the tape” of the conversation between Jordan and the
    detective and “reviewing the transcript of the [evidentiary]
    hearing”).
    The Arizona Supreme Court’s summary of the
    circumstances surrounding Jordan’s identification finds
    ample support in the record and reflects that nothing
    untoward occurred between police and Jordan, contrary to
    Walden’s speculation, see Walden II, 
    2008 WL 2026217
    ,
    at *11 (“[Walden’s] argument about Jordan’s pretrial
    identification boils down to this statement: ‘It is simply too
    difficult to accept, in terms of due process, that Ms. Jordan
    could go from not recognizing Mr. Walden at all prior to the
    tape being turned off to being able to make a positive
    identification of him after the tape resumed.’” (citation
    omitted)):
    [Jordan] saw two men [on June 13] at the
    [Burhans’s] apartment complex. One stood
    out because he had been acting strangely, and
    32                  WALDEN V. SHINN
    she made a mental note of it. When she heard
    about the murder, she called the police. After
    viewing the photographic line-up (the same
    one shown to [Blanar] and [Velasco]),
    [Jordan] indicated that the person in the
    number two position, which was not Walden,
    “looked very similar to the person [she] saw.”
    She said that his eyes and complexion were
    similar but that his nose was different.
    Believing they were finished, the officer
    turned the tape off. [Jordan], still looking at
    the photographs, then indicated that although
    some of the pictures looked similar to the man
    who had acted strangely, she had definitely
    seen the man pictured in the number five
    position, which was Walden. She stated that
    he had looked like a maintenance person or
    was “doing something in the yard” of the
    complex. She also stated that Walden had
    some type of equipment with him.
    The officer immediately turned the tape
    recorder back on. She explained on tape what
    had just happened, and [Jordan] confirmed it.
    At the [suppression] hearing, both [Jordan]
    and the officer verified that the tape
    accurately reflected what had occurred
    off-tape. Walden did not offer any evidence to
    rebut their testimony. Nor did he elicit on
    cross-examination anything that would
    contradict this explanation of the off-tape
    conversation.
    
    Id.
     at 985–86.
    WALDEN V. SHINN                         33
    The Arizona Supreme Court’s conclusion that Jordan “did
    not take part in a suggestive identification procedure” was not
    unreasonable on this record. Id. at 986.
    5
    Because the Arizona Supreme Court reasonably
    determined that the three identifications at issue were not the
    product of impermissibly suggestive police procedures, there
    was no need for the court to assess the reliability of each
    identification under the totality of the circumstances. See
    Perry, 
    565 U.S. at 248
     (“[T]he Due Process Clause does not
    require a preliminary judicial inquiry into the reliability of an
    eyewitness identification when the identification was not
    procured under unnecessarily suggestive circumstances
    arranged by law enforcement.”); see also Bagley, 
    772 F.2d at 492
    ; Love, 
    746 F.2d at 478
    . To the extent Walden argues
    otherwise, he is mistaken.
    6
    Finally, we reject Walden’s challenge to the Velasco
    identification insofar as it rests on a factual basis that he
    failed to present to the Arizona Supreme Court. See 
    28 U.S.C. § 2254
    (b)(1)(A); Robinson, 
    595 F.3d at 1101
    (exhaustion requires “present[ing] both the factual and legal
    basis for the claim to the state court”). Because Walden did
    not give the state court a “fair opportunity” to consider this
    factual basis for his challenge to the Velasco identification,
    we lack jurisdiction to consider whether those facts establish
    a constitutional violation. See Davis, 
    511 F.3d at
    1008–09.
    34                        WALDEN V. SHINN
    C
    As to Claim 3, the district court properly concluded that
    McKinney v. Ryan, 
    813 F.3d 798
     (9th Cir. 2015) (en banc),
    has no impact on Claim 31 of Walden’s habeas petition. In
    Claim 31, Walden argued that the state trial court failed to
    properly consider the mitigating evidence, given that the
    court had prepared a special verdict before the submission of
    evidence. Because Walden did not identify any causal nexus
    error by the Arizona Supreme Court in Claim 31, his belated
    claims of causal nexus error are not cognizable on appeal.
    D
    As to Claim 4, the district court properly denied Walden
    leave to amend his habeas petition to add five previously-
    withdrawn IAC claims on the grounds that those claims are
    untimely and do not relate back to his timely-filed claims and
    that Walden unduly delayed seeking leave to amend. We
    deny Walden’s request, made for the first time on appeal, for
    equitable tolling.
    1
    Under Rule 15 of the Federal Rules of Civil Procedure,7
    the civil rule governing amended pleadings, an amendment
    made after the statute of limitations has run “relates back to
    the date of the original pleading,” thereby avoiding AEDPA’s
    time bar, when “the amendment asserts a claim . . . that arose
    7
    “Habeas Corpus Rule 11 permits application of the Federal Rules
    of Civil Procedure in habeas cases to the extent that the civil rules are not
    inconsistent with any statutory provisions or the habeas rules.” Mayle v.
    Felix, 
    545 U.S. 644
    , 654 (2005) (cleaned up).
    WALDEN V. SHINN                        35
    out of the conduct, transaction, or occurrence set out—or
    attempted to be set out—in the original pleading.” Rule
    15(c)(1)(B). Walden sought leave to amend his petition to
    include the five IAC claims at issue here several years after
    the deadline for filing his habeas petition had passed. See
    Walden v. Arizona, 
    517 U.S. 1146
     (1996) (Mem.) (denying
    certiorari). Thus, the district court properly focused its
    timeliness analysis on whether any of the proposed IAC
    claims relate back to the timely-filed claims under Rule 15(c).
    To satisfy Rule 15(c)’s relation-back standard, the
    proposed claims and the “original” claims must be “tied to a
    common core of operative facts.” Hebner v. McGrath, 
    543 F.3d 1133
    , 1138 (9th Cir. 2008) (quoting Mayle, 
    545 U.S. at 664
    ). “An amended habeas petition ‘does not relate back
    (and thereby escape AEDPA’s one-year time limit) when it
    asserts a new ground for relief supported by facts that differ
    in both time and type from those the original pleading set
    forth.’” 
    Id.
     (quoting Mayle, 
    545 U.S. at 650
    ). In other words,
    “relation back requires a single course or pattern of
    conduct—not factually and temporally unrelated conduct
    arising out of the same underlying proceeding.” Ross v.
    Williams, 
    950 F.3d 1160
    , 1171 (9th Cir. 2020) (en banc).
    After carefully comparing the proposed IAC claims to the
    timely claims on which Walden relies to support relation
    back, we agree with the district court that they lack a
    “common core of operative facts.” Hebner, 
    543 F.3d at 1138
    .
    As the district court observed with respect to these claims,
    “not only are the actors different, the alleged error different,
    and the time [each] claim arose different, the core operative
    facts are almost entirely unique to each claim.” Thus, the
    “barrier to relation back” here “is the difference between [the
    claims’] respective factual predicates.” Alfaro v. Johnson,
    36                    WALDEN V. SHINN
    
    862 F.3d 1176
    , 1184 (9th Cir. 2017); see also Schneider v.
    McDaniel, 
    674 F.3d 1144
    , 1151 (9th Cir. 2012).
    Thus, without the need to discuss the claims in detail, we
    agree with the district court that the new claims do not satisfy
    the requirements of Rule 15(c).
    2
    We also deny Walden’s belated request for equitable
    tolling—made for the first time on appeal. Because Walden
    did not raise this issue before the district court, we review it
    for plain error. United States v. Olano, 
    507 U.S. 725
    , 734
    (1993). In order to find plain error, we must determine that
    (1) there was “error”; (2) it was “plain”; and (3) the error
    affected “substantial rights.” 
    Id.
     at 732–35.
    Although the AEDPA statute of limitations is subject to
    equitable tolling, in order to be entitled to equitable tolling, a
    petitioner must show “(1) that he has been pursuing his rights
    diligently, and (2) that some extraordinary circumstance
    stood in his way and prevented timely filing.” Smith v. Davis,
    
    953 F.3d 582
    , 588 (9th Cir. 2020) (en banc) (cleaned up).
    Here, the district court’s independent finding, in denying the
    motion to file an amended petition, that Walden did not
    exercise due diligence in pursuing the amended claims is
    amply supported by the record. Absent due diligence,
    Walden is not entitled to equitable tolling, and the district
    court did not commit plain error.
    As we have noted, Walden filed his initial federal habeas
    petition in November 1999. After the district court requested
    a statement concerning exhaustion, he filed an amended
    petition on August 16, 2000, which included the IAC claims.
    WALDEN V. SHINN                        37
    In October 16, 2000, he withdrew the IAC claims. Three
    months after the state courts deemed those claims
    procedurally barred because he had not previously raised
    them in state court, and four years after he had withdrawn
    them from the federal proceedings, he sought amendment to
    re-assert them in federal court. The district court noted that,
    instead of complying with the court’s order and attempting to
    establish cause and prejudice to excuse the procedural
    defaults, Walden voluntarily withdrew the claims without
    leave of court. In sum, following his conviction in 1992,
    Walden did not assert the IAC claims in state court. He first
    asserted them in federal court eight years later, then withdrew
    them, then attempted to reassert them four years later. The
    record supports the district court’s conclusion that Walden
    had not exercised due diligence, and there was no plain error
    in not applying the doctrine of equitable tolling.
    Walden further contends, for the first time in
    supplemental briefing filed shortly before oral argument in
    this case, that he is entitled to equitable tolling under
    Williams v. Filson, 
    908 F.3d 546
     (9th Cir. 2018), which was
    decided after the district court order. However, Williams is
    inapplicable here. In Williams, we held that the district court
    had erred in denying equitable tolling where the petitioner,
    who filed his amended habeas petition nearly one year after
    the AEDPA deadline, reasonably “assumed that the claims
    asserted in his amended petition” would relate back to his
    original petition based on the then-unsettled state of the law
    regarding the relation-back standard in habeas cases. 
    Id.
     at
    559–61. However, unlike the situation in Williams, based on
    a survey of the law as it stood in October 2000—when
    Walden withdrew his IAC claims—there was not a
    reasonable expectation that the district court would later
    38                    WALDEN V. SHINN
    deem those claims related to the remaining claims under Rule
    15(c).
    As we noted in Williams, federal circuit courts—albeit not
    the Ninth—first began “imposing a more restrictive reading
    of Rule 15(c)” in February 1999, 
    id.
     at 560—before Walden
    withdrew the five IAC claims. See United States v.
    Craycraft, 
    167 F.3d 451
    , 457 (8th Cir. Feb. 3, 1999); see also
    United States v. Duffus, 
    174 F.3d 333
    , 337 (3d Cir. Apr. 20,
    1999); United States v. Pittman, 
    209 F.3d 314
    , 317–18 (4th
    Cir. Mar. 24, 2000); Davenport v. United States, 
    217 F.3d 1341
    , 1344–46 (11th Cir. July 13, 2000). Given a rapidly-
    emerging circuit-level consensus that “transaction” or
    “occurrence” in Rule 15(c) did not broadly refer to a
    petitioner’s conviction and trial, Walden’s counsel, unlike
    Williams’s, had ample “reason to suspect that Rule 15(c)
    would pose an obstacle to consideration of newly added
    claims in an amended petition.” Williams, 908 F.3d at 560.
    Further, in Williams, unlike the situation here, the State did
    not contest Williams’ diligence in pursuing his rights in the
    year between the end of the limitations period and the filing
    of his amended petition. See id. at 558. Finally, unlike the
    situation in Williams, the district court here did not authorize,
    nor did the State consent to amendment outside the
    limitations period. To the contrary, the district court here
    ordered Walden to file, by a deadline well within the
    limitations period, an amended petition asserting “all known
    claims of constitutional error or deprivation.”
    In sum, Walden’s IAC claims are time-barred because
    they do not relate back to any timely-filed claims and he is
    not entitled to equitable tolling.
    WALDEN V. SHINN                        39
    E
    As to Claim 5, the district court properly concluded that
    the trial court’s admission of 19 purportedly “gruesome”
    crime scene and autopsy photos does not entitle Walden to
    habeas relief because the state court’s decision did not
    involve an objectively unreasonable application of clearly
    established Supreme Court precedent or an objectively
    unreasonable determination of the facts. See Walden II, 
    2008 WL 2026217
    , at *19–21.
    1
    Walden’s argument is foreclosed by Holley v.
    Yarborough, in which we held that there was, at that time, no
    clearly established federal law providing that the “admission
    of irrelevant or overtly prejudicial evidence constitutes a due
    process violation sufficient to warrant issuance of the writ.”
    
    568 F.3d 1091
    , 1101 (9th Cir. 2009) (rejecting challenge to
    the admission of sexually explicit materials seized from
    Holley’s bedroom during his trial for, inter alia, child
    molestation). That remains true.
    2
    Further, the Arizona Supreme Court reasonably reached
    the following conclusions: (i) The photos were relevant to the
    disputed issue of premeditation as well as “helpful to
    illustrate” Dr. Howard’s “long and detailed” testimony
    regarding Burhans’s injuries; and (ii) they were not unduly
    prejudicial because “only three show[ed] [Burhans’s] body at
    the crime scene, and only one of those actually show[ed]
    [her] wounds,” while the autopsy photos showed her body
    after it “had been washed” and were mostly “close-ups of her
    40                       WALDEN V. SHINN
    various wounds.” Walden, 
    905 P.2d at 989
    . As the district
    court observed in denying relief on this claim, see Walden II,
    
    2008 WL 2026217
    , at *19–21, these conclusions find ample
    support in the record. In addition, the record reflects that the
    trial court exercised considerable care in shielding the jury
    from unnecessary exposure to excessively gruesome photos
    by excluding a subset of photos from admission into
    evidence.
    Walden contends that he offered to stipulate to the
    victim’s injuries, so that the introduction of the evidence was
    unnecessary. However, “nothing in the Due Process Clause
    of the Fourteenth Amendment requires the State to refrain
    from introducing relevant evidence simply because the
    defense chooses not to contest the point.” McGuire, 
    502 U.S. at 70
    . He further argues that the photographs were
    inadmissible under Arizona state law; however, we cannot
    grant federal habeas relief founded on an alleged non-
    constitutional state evidentiary error. See Romano v.
    Oklahoma, 
    512 U.S. 1
    , 10 (1994) (“That the evidence may
    have been irrelevant as a matter of state law . . . does not
    render its admission federal constitutional error.”); McGuire,
    
    502 U.S. at 67
     (“[F]ederal habeas corpus relief does not lie
    for errors of state law.” (citation omitted)). In sum, we affirm
    the district court’s denial of habeas relief in connection with
    Claim 5.8
    8
    On appeal, Walden now argues that consideration of the challenged
    photos during the sentencing phase violated his due process rights
    (separate and apart from his challenge to their admission at trial). Walden
    did not present this claim to the Arizona Supreme Court or in his operative
    habeas petition. See Walden, 
    905 P.2d at 989
    ; Walden II, 
    2008 WL 2026217
    , at *19–21. Therefore, we hold that this claim is both
    unexhausted and waived. See Davis, 
    511 F.3d at
    1008–09; Robinson, 
    588 F.3d at 1217
    .
    WALDEN V. SHINN                       41
    IV
    For the foregoing reasons, we affirm the district court’s
    well reasoned denial of Walden’s petition for a writ of habeas
    corpus.
    AFFIRMED.