Robert Ladd v. William Stephens, Director , 748 F.3d 637 ( 2014 )


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  •      Case: 13-70011       Document: 00512588848         Page: 1    Date Filed: 04/08/2014
    IN THE UNITED STATES COURT OF APPEALS
    FOR THE FIFTH CIRCUIT
    United States Court of Appeals
    Fifth Circuit
    FILED
    No. 13-70011                                April 8, 2014
    Lyle W. Cayce
    ROBERT CHARLES LADD,                                                                 Clerk
    Petitioner–Appellant
    v.
    WILLIAM STEPHENS, Director,
    Texas Department of Criminal Justice,
    Correctional Institutions Division,
    Respondent–Appellee
    Appeal from the United States District Court
    for the Eastern District of Texas
    Before HIGGINBOTHAM, DAVIS, and HAYNES, Circuit Judges.
    HIGGINBOTHAM, Circuit Judge:
    A Texas jury convicted Robert Ladd of capital murder and sentenced him
    to death for the rape and murder of Vicki Ann Garner. Ladd sought habeas
    relief in federal district court, claiming that he is mentally retarded 1 and
    therefore categorically ineligible for the death penalty under Atkins v.
    1  As our sister circuits have explained, “the preferred terminology for mental
    retardation is now ‘intellectual disability.’” Brumfield v. Cain, No. 12-30256, 
    2014 WL 805327
    , at *1 n.1 (5th Cir. Feb. 28, 2014) (citing Pizzuto v. Blades, 
    729 F.3d 1211
    , 1214 n.1
    (9th Cir. 2013); Hooks v. Workman, 
    689 F.3d 1148
    , 1159 n.1 (10th Cir. 2012)). Yet, because
    the term mental retardation is used by both the parties and relevant legal authority, we use
    mentally retarded throughout our opinion.
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    No. 13-70011
    Virginia. 2 Following an evidentiary hearing, the district court denied habeas
    relief, but granted a Certificate of Appealability (“COA”). We AFFIRM.
    I
    A
    In 1978, Robert Ladd was convicted of murdering a woman and her two
    children, and then setting her house on fire. After serving 16 years of a 40 year
    prison sentence, Ladd was released from prison. On September 25, 1996, Vicki
    Ann Garner was found dead in her home.                 Garner had been raped and
    strangled to death. In addition, her home was robbed and then set on fire.
    A police investigation quickly connected Ladd to Garner’s murder. 3
    Ladd’s DNA was found on Garner, his hand print was found in Garner’s
    kitchen, and Ladd had sold a TV set that had been taken from Garner’s
    residence in exchange for crack cocaine. 4
    Soon thereafter, Ladd was indicted for capital murder, as the murder
    occurred during the commission of burglary, robbery, sexual assault, and
    arson. On August 23, 1997, a Texas state jury convicted Ladd of capital
    murder, and, on August 27, 1997, the jury imposed the death penalty. A direct
    appeal then followed, which was denied on October 6, 1999. 5 Ladd’s petition
    for a writ of certiorari was then denied on April 17, 2000.
    Ladd filed his first state petition for habeas relief, asserting an
    ineffective assistance of counsel claim, alleging that Ladd’s counsel was
    ineffective for failing to raise evidence of mental retardation during the
    punishment phase. The state district court held an evidentiary hearing, where
    Ladd presented testimony of his trial counsel, but did not present a psychiatric
    2 
    538 U.S. 1064
     (2003).
    3 See generally Ladd v. Texas, 
    3 S.W.3d 547
    , 556 (Tex. Crim. App. 1999).
    4 
    Id.
    5 
    Id.
    2
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    expert. The State presented its psychologist and psychiatrist who had both
    testified at trial that Ladd presented a future danger. These experts generally
    opined that they would discount Ladd’s prior IQ score of 67, explaining that
    they did not know enough about the administration of the test and that such a
    result was inconsistent with his later academic achievement. But, neither
    expert had tested Ladd’s IQ, nor otherwise examined him for mental
    retardation; indeed, their testimony centered on their conclusion that the
    additional information obtained about Ladd would not have changed their
    expert opinions regarding his future dangerousness. The state trial court then
    issued its findings of fact and conclusions of law, wherein it concluded:
    The information that Applicant had scored 67 on an IQ
    test as a juvenile did not support an inference that
    Applicant was mentally retarded because of a higher
    IQ score, the completion of the GED program and
    completion of barber school as an adult. . . . The
    information that Applicant scored 67 on an IQ test was
    not mitigating because of the other information that
    Applicant was not mentally retarded. 6
    The Texas Court of Criminal Appeals (“CCA”) then denied Ladd’s petition for
    state habeas relief on December 15, 1999. 7
    Ladd filed his first application for federal habeas relief on January 18,
    2001. Ladd again raised the claim that he received ineffective assistance by
    counsel because his attorney had not raised evidence of Ladd’s mental
    retardation during the punishment phase. The district court rejected this
    claim on October 24, 2001. We affirmed, concluding that “the Texas court was
    well-within the bounds of AEDPA reasonableness in concluding that Ladd
    suffered no prejudice.” 8
    
    6 R. 238
    .
    7 Ex Parte Ladd, No. 42,639-01 (Tex. Crim. App. 1999).
    8 Ladd v. Cockrell, 
    311 F.3d 349
    , 360 (5th Cir. 2002).
    3
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    Following the Supreme Court’s decision in Atkins v. Virginia, 9 Ladd filed
    his second petition for state habeas relief on April 7, 2003, arguing that he was
    categorically excluded from the death penalty because of mental retardation.
    In support of this claim, Ladd attached several exhibits to his state petition,
    including: (i) documentation from Ladd’s childhood institutionalization in the
    Gatesville State School, where his IQ had been tested at 67; (ii) psychiatric
    notes from this institutionalization wherein the psychiatrist noted that Ladd
    is “rather obviously retarded” and had “mental retardation, mild to moderate”;
    (iii) institutionalization records showing that Ladd was functioning below his
    grade level in basic academic skills and had social development problems; and,
    (iv) documentation that as a child Ladd was prescribed Mellaril, an anti-
    psychotic medication, to control his impulsive behavior. Arguing that he had
    set forth a prima facie Atkins claim, Ladd requested an evidentiary hearing to
    refute any evidence the State might offer and to develop fully his claim.
    Without an evidentiary hearing, or any opportunity to develop fully his Atkins
    claim, the CCA dismissed the petition on the merits ten days later on April 17,
    2003, explaining that he failed to plead sufficient facts to permit a successive
    writ under Texas state law. 10
    Ladd sought authorization from this Court to file a second application
    for habeas relief in the district court. We authorized the successive writ, and
    on June 20, 2003, Ladd filed the application for habeas corpus at issue.
    9  
    536 U.S. 304
     (2002) (holding that the mentally retarded are categorically excluded
    from the death penalty).
    10 Although the CCA dismissed this successive petition ostensibly as an abuse of the
    writ, we have explained that “in the Atkins context, Texas courts have imported an
    antecedent showing of ‘sufficient specific facts’ to merit further review, rendering dismissal
    of such claims [as abuse of the writ] a decision on the merits. . . . Thus, a decision that an
    Atkins petition does not make a prima facie showing—and is, therefore, an abuse of the writ—
    is not an independent state law ground.” Rivera v. Quarterman, 
    505 F.3d 349
    , 359 (5th Cir.
    2007) (internal citations and quotation marks omitted).
    4
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    B
    On June 27, 2005, the district court conducted an evidentiary hearing on
    the application.      Ladd presented several witnesses, including:                 Richard
    Garnett, a licensed professional counselor; 11 Lubertha Cephus, Ladd’s
    mother’s first cousin; Russell Pinckard, a death row corrections officer; and,
    Nelma Thomas, Ladd’s sister.
    Garnett testified that, in his expert opinion, Ladd was mentally
    retarded. First, Garnett explained that Ladd had significantly sub-average
    intellectual functioning. 12 Garnett based this conclusion on Ladd receiving an
    IQ score of 67, when he was tested at age 13 by the Texas Youth Commission. 13
    Moreover, Garnett explained that the Texas Youth Commission’s psychiatrist,
    Phillip Ash, noted that Ladd appeared mentally retarded. 14                   In addition,
    Garnett noted that Ladd had a low birth weight, consistent with fetal alcohol
    syndrome. 15 Garnett did note that Ladd later received an IQ score of 86, but
    he explained that this score was on a less comprehensive IQ test, the Beta test,
    that is not as accurate as the previously administered Wechsler test. 16 Garnett
    discounted a more recent Wechsler test IQ score of 60, because there were signs
    of malingering. 17
    Second, Garnett testified that Ladd had significant adaptive skills
    deficits. In particular, Garnett testified that Ladd had deficits with: money
    concepts, work-related skills, using community resources, communications
    11 See Tr. of Evid. Hr’g Vol. 1 at 28.
    12 
    Id.
     at 65–66.
    13 
    Id.
    14 
    Id.
     at 69–71.
    15 
    Id.
     at 77–78, 115.
    16 
    Id.
     at 81–86. Garnett explained that “the Beta [IQ test] is not recognized as a
    substantive test of intelligence. . . . The Beta [IQ test] is a screening instrument which is
    designed to get a rough guesstimate of someone’s functional level.” 
    Id.
     at 84–85.
    17 
    Id.
     at 90–94.
    5
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    skills, and social skills. 18 In addition, Garnett testified that Ladd’s deficits
    were properly attributed to mental retardation, rather than anti-social
    personality disorder. 19 Although Garnett acknowledged that he could not use
    any evaluative instruments for measuring the adaptive skills of an
    incarcerated individual, he explained that he was able to make this assessment
    based on his clinical judgment and experience. 20           Additionally, Garnett
    discounted Ladd’s having obtained a G.E.D., learning to play chess, and having
    written many letters, by explaining that obtaining a G.E.D. and learning to
    play chess were not outside the capacity of the mildly mentally retarded. 21 As
    to the letters, Garnett explained that based on his conversations with Ladd he
    believed that Ladd had received substantial assistance in writing those
    letters. 22
    Third, Garnett testified that, given his childhood IQ score of 67 and
    family reports of adaptive functioning deficits, these deficits developed prior to
    Ladd turning 18 years old. 23
    On cross-examination, the State elicited from Garnett that (i) Ladd was
    a latch-key kid who had been able to take care of himself; 24 (ii) by 11 years old,
    Ladd could handle money; 25 (iii) Ladd’s failure to make friends during
    childhood may have been a product of his anti-social personality disorder, and
    not retardation; 26 (iv) Ladd’s reading ability tests above the tenth grade level,
    despite most mentally retarded being unable to read above the seventh grade
    18 
    Id.
     at 96–97.
    19 
    Id.
     at 98–100.
    20 
    Id.
     at 107–11, 197.
    21 
    Id.
     at 103–05.
    22 
    Id.
     at 100–02.
    23 
    Id.
     at 113–16.
    24 
    Id.
     at 128–30.
    25 Id. at 132.
    26 Id. at 137.
    6
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    level; 27 (v) Ladd had successfully completed vocational training programs in
    prison; 28 and, (vi) Ladd was successful working in a structured environment
    when he was not in prison. 29
    Lubertha Cephus testified that Ladd’s mother drank heavily while
    pregnant with Ladd. 30 Ladd’s sister, Nelma Thomas, testified that Ladd had
    problems understanding the concepts of games as a child: she explained that
    he did not understand the concept of suits in card games and that he did not
    understand the need to run to first base while playing kickball. 31 In addition,
    Thomas testified that Ladd often failed to dress himself appropriately for the
    weather when he was twelve to fourteen years old, and that when her mother
    sent him to the store, he could not remember what he was supposed to
    purchase. 32
    The State presented several witnesses, including: Al Matson, the
    manager of the vocational program at which Ladd worked, Howard Alexander,
    a prison barber instructor, and Dr. Thomas Allen, a forensic psychologist.
    Matson explained that he managed the vocational division of the Andrews
    Center, a community mental health/mental retardation healthcare center. 33
    Matson testified that Ladd was referred to the Andrews Center from a
    substance abuse facility, 34 and was a capable worker. 35 Matson explained that
    Ladd was placed into some of the more challenging positions, such as line
    leader and quality control. 36 During the course of his employment, Ladd could
    27 Id. at 159–60.
    28 Id. at 153–58.
    29 Id. at 169.
    30 Id. at 203.
    31 See Tr. of Evid. Hr’g Vol. 2 at 237–39.
    32 Id. at 241–42.
    33 Id. at 257.
    34 Id. at 263.
    35 Id. at 261–62.
    36 Id. at 262.
    7
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    operate an ultrasonic welding machine, setup electronic weighing scales, and
    operate a forklift. 37 Matson testified that Ladd did not require any special
    assistance or supervision, and would have been promoted but for his criminal
    background. 38 Although Ladd was initially started at below minimum wage,
    he received several raises in the course of his work, resulting in above-
    minimum wage payment. 39 These funds were paid into a trust account, but
    the Andrews Center used trust account for non-mentally retarded workers, as
    well as the mentally retarded. 40 Eventually, Matson explained, Ladd was fired
    because of problems with absenteeism and confrontations with supervisors. 41
    Howard Alexander testified that he taught a vocational barber training
    program in prison. 42         The program required at least a seventh grade
    education, 43 and, in Alexander’s opinion, could not be completed by anyone
    with serious learning deficiencies. 44 Although Alexander does not remember
    instructing Ladd, Alexander’s records indicate that Ladd completed the state
    barber exam and was one of Alexander’s better students. 45
    Dr. Thomas Allen, a forensic psychologist, 46 testified that in his opinion
    Ladd was not mentally retarded. First, Dr. Allen explained that he did not
    trust the IQ score of 67 administered when Ladd was 13, because Ladd had a
    propensity for “prevarication” and low motivation, and there were no notes as
    to whether the degree of Ladd’s effort on the examination were observed. 47
    37 Id. at 264–65.
    38 Id. at 268–69.
    39 Id. at 290–91.
    40 Id. at 292.
    41 Id. at 270–71.
    42 Id. at 299–300.
    43 Id. at 301.
    44 Id. at 302, 307.
    45 Id. at 311.
    46 Id. at 314.
    47 Id. at 324–25.
    8
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    Relatedly, Dr. Allen explained that the IQ score of 86, although only measured
    by a screening tool, was instructive, as it placed Ladd within the average range
    of prisoners screened. 48 Similar to Garnett, Dr. Allen opined that the recent
    score of 60 was unreliable because of malingering. 49
    Second, Dr. Allen testified that Ladd’s of possible adaptive deficits were
    properly explained by Ladd’s anti-social personality disorder, because the
    behavioral observations predominantly focused on aggression and anti-social
    conduct, not on behavioral deficits typically associated with mental
    retardation. 50
    Third, Dr. Allen explained that he administered the Vineland Adaptive
    Skills Inventory, which he modified to adapt to Ladd. 51           Although this
    inventory has not been normed on prisoners, Dr. Allen explained that Ladd’s
    score placed him well within the middle, or average, range of the population. 52
    Reviewing Ladd’s history, Dr. Allen opined that his adaptive deficits were due
    to behavioral problems, not mental retardation, including deficits related to
    functional academics, using community resources, inter-personal skills, and
    communications skills. 53 Finally, Dr. Allen opined that, although possible, it
    would be very unusual for someone to suffer from both mental retardation and
    anti-social personality disorder. 54
    Following the evidentiary hearing, the district court issued a
    memorandum opinion and order, wherein it concluded that it found the State’s
    expert witness to be more persuasive. Accordingly, the district court denied
    48 Id. at 381–82.
    49 Id. at 352–60.
    50 Id. at 325–26.
    51 Id. at 364–66.
    52 Id. at 364–80.
    53 Id. at 333–48.
    54 Id. at 327.
    9
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    the application on February 15, 2013, concluding that Ladd had failed to
    establish by a preponderance of the evidence that he was mentally retarded. 55
    The district court then granted a COA on March 28, 2013.                     Ladd timely
    appeals.
    II
    We begin with the State’s argument that the district court failed to apply
    proper Antiterrorism and Effective Death Penalty Act of 1996 (“AEDPA”)
    deference to the state court proceedings. The State argues that the state courts
    were not required to afford Ladd an evidentiary hearing, and accordingly the
    district court should have afforded AEDPA deference to the state proceedings.
    AEDPA mandates deference to state court proceedings. If a “state court
    has adjudicated a habeas petitioner’s claims on the merits, he may receive
    relief in the federal courts only where the state court decision ‘resulted in a
    decision that was contrary to, or involved an unreasonable application of
    clearly established federal law’” or “‘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.’” 56 And it is “axiomatic that infirmities in state
    habeas proceedings do not constitute grounds for federal habeas relief.” 57
    Nonetheless, we have explained that where there is “a significant substantive
    liberty interest [at stake],” that liberty interest “entitles the petitioner to a set
    of core procedural due process protections: the opportunity to develop and be
    heard on his claim that he is ineligible for the death penalty.” 58 Thus, “when
    55 See Ladd v. Thaler, No. 1:03cv00239-RAS, 
    2013 WL 593927
    , at *11 (E.D. Tex. Feb.
    15, 2013).
    56 Rivera, 
    505 F.3d at 355
     (quoting 
    28 U.S.C. § 2254
    (d)).
    57 Moore v. Dretke, 
    369 F.3d 844
    , 846 (5th Cir. 2004) (per curiam) (internal quotation
    marks and citation omitted).
    58 Blue v. Thaler, 
    665 F.3d 647
    , 657 (5th Cir. 2011) (quoting Wiley v. Epps, 
    625 F.3d 199
    , 207 (5th Cir. 2010)).
    10
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    a petitioner makes a prima facie showing of mental retardation, a state court’s
    failure to provide him with an opportunity to develop his claim deprives the
    state court decision of deference ordinarily due under . . . AEDPA.” 59 This is
    because where a “state court dismisses a prima facie valid Atkins claim without
    having afforded the petitioner an adequate opportunity to develop the claim, it
    has run afoul of the Due Process Clause, and that due process violation
    constitutes an unreasonable application of clearly established federal law that
    is sufficient to deprive the state court’s decision of AEDPA deference.” 60
    Importantly, this does not require states to “give hearings to all persons with
    Atkins claims” because “states [are given] discretion to set gateways to full
    consideration and to define the manner in which habeas petitioners may
    develop their claims.” 61
    The State rightly points to serious problems regarding the deference due
    to the CCA’s judgment and whether the district court afforded proper deference
    under AEDPA. This is in no small part directly attributable to the long length
    of time this case was pending in the district court, during which the landscape
    of AEDPA deference 62 and Atkins claims substantially changed. But we need
    not reach this, as it is sufficient to say that the district court’s rejection of
    Ladd’s Atkins claim following de novo review is, as we explain below, sound,
    and the district court must be affirmed. Any want of deference to the state
    court cannot, by definition, have injured the State.
    59  Id. at 656.
    60  Id. (citing Wiley, 625 F.3d at 207); see also Rivera, 
    505 F.3d at 358
     (“The lesson we
    draw . . . is that, where a petitioner has made a prima facie showing of retardation as Rivera
    did, the state court’s failure to provide him with the opportunity to develop his claim deprives
    the state court’s decision of the deference normally due.” (citing Panetti v. Quarterman, 
    551 U.S. 930
     (2007)).
    61 
    Id.
     at 657 (citing Rivera v. Quarterman, 
    505 F.3d 349
    , 359 (5th Cir. 2007)
    62 See, e.g., Cullen v. Pinholster, 
    131 S.Ct. 1388
    , 1398 (2011) (“We now hold that review
    under § 2254(d)(1) is limited to the record that was before the state court that adjudicated
    the claim on the merits.”).
    11
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    III
    We turn to the merits of Ladd’s claim of mental retardation. We review
    the district court’s factual findings for clear error and the district court’s
    conclusions of law de novo. 63 A finding of fact is “clearly erroneous only if it is
    implausible in the light of the record considered as a whole.” 64
    In Atkins, the Supreme Court left to the states the formulation and
    adoption of their own definitions of mental retardation. 65 Under Texas law,
    “mental retardation is a disability characterized by (1) significantly
    subaverage general intellectual functioning”; “(2) accompanied by related
    limitations in adaptive functioning; (3) the onset of which occurs prior to the
    age of 18.” 66           The CCA defines a significant “subaverage intellectual
    functioning . . . as an IQ of about 70 or below.” 67                   Because there is a
    measurement error of approximately 5 points, “any score could actually
    represent a score that is five points higher or five points lower than the actual
    IQ.” 68        With respect to limitations in adaptive functioning, the CCA has
    explained that “three adaptive-behavior areas are applicable to determining
    mental retardation: conceptual skills, social skills, and practical skills.” 69
    Importantly,           the   subaverage     intellectual    functioning     and   significant
    limitations in adaptive functioning must be linked: “the adaptive limitations
    must be related to a deficit in intellectual functioning and not a personality
    63   Rivera, 
    505 F.3d at
    361 (citing Woods v. Quarterman, 
    493 F.3d 580
    , 584 (5th Cir.
    2007)).
    
    Id.
     (quoting St. Aubin v. Quarterman, 
    470 F.3d 1096
    , 1101 (5th Cir. 2006)).
    64
    
    536 U.S. at 317
    .
    65
    66 Blue, 665 F.3d at 657–58 (citing Ex parte Briseno, 
    135 S.W.3d 1
    , 7–8 (Tex. Crim.
    App. 2004)).
    67 Ex parte Hearn, 
    310 S.W.3d 424
    , 428 (Tex. Crim. App. 2010).
    68 
    Id.
    69 
    Id.
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    disorder.” 70 A petitioner’s failure to establish “any one of these three elements
    will defeat an Atkins claim.” 71
    The district court concluded that Ladd failed to establish an Atkins
    claim. First, the district court found “by a preponderance of the evidence that
    Ladd has significantly sub-average intellectual functioning.” 72 The district
    court explained that this conclusion was compelled by (i) Ladd’s scoring 67 on
    a Wechsler IQ test at age 13, and (ii) both parties’ experts agreeing that both
    subsequently administered IQ tests, where Ladd achieved scores of 86 and 60,
    are less reliable because the higher score of 86 was achieved on a less accurate
    test instrument and the lower score of 60 was likely the result of malingering. 73
    Second, the district court found that “Ladd has failed to establish by a
    preponderance of the evidence that any of his deficits in adaptive functioning
    are significant.” 74 The district court explained that although both Ladd’s and
    the State’s experts agreed that Ladd “demonstrated deficits in adaptive
    behavior in functional academics, social skills, work, and communication,” the
    experts disagreed as to whether these deficits were properly attributed to his
    mental retardation or his anti-social personality disorder. 75 The district court
    considered the experts’ testimony as to each adaptive deficits and concluded
    that the State’s expert’s testimony was more persuasive. It then concluded
    that, as to his deficits in functional academics, social skills, and work, Ladd’s
    deficits were properly attributed to his anti-social personality disorder. As to
    his deficit in adaptive behavior in communications skills, the district court
    70  
    Id.
    71  Blue, 665 F.3d at 658 (citing Clark v. Quarterman, 
    457 F.3d 441
    , 444 (5th Cir. 2006)
    (“It is plain that [Briseno] requires that all three elements exist to establish mental
    retardation.”).
    72 Ladd, 
    2013 WL 593927
     at *8.
    73 
    Id.
    74 
    Id.
     at *10 .
    75 Id. at *8.
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    explained that neither expert claimed that a deficiency in this skill could be
    related to Ladd’s anti-social personality disorder. Accordingly, the district
    court found that this deficit was related to his sub-average intellectual
    functioning, but, under Texas law, Ladd must possess two deficits in adaptive
    behavior. In addition, the district court found that to the extent Ladd has
    deficits in his adaptive behavior, these deficits are not significant limitations.
    In this regard, the district court found the State’s expert’s testimony to be more
    credible and persuasive.
    Ladd argues that the district court committed clear error in concluding
    that he was not mentally retarded. First, Ladd agrees with the district court’s
    finding that Ladd has significantly sub-average intellectual functioning.
    Second, Ladd argues that the district court clearly erred when it concluded (i)
    that all but one of Ladd’s deficits in adaptive behavior are properly attributed
    to his anti-social personality disorder, and (ii) that none of Ladd’s deficits in
    adaptive behavior are significant. Ladd argues that it is highly unlikely that
    Ladd would have subaverage intelligence and not have adaptive deficits. In
    addition, Ladd argues that the district court erred in requiring Ladd to
    demonstrate that his adaptive deficits were caused by his low intellectual
    functioning, and not his anti-social personality disorder.
    The district court did not clearly err in finding that Ladd was not
    mentally retarded.         To begin with, as the CCA has noted, the “adaptive
    behavior criteria are exceedingly subjective[.]” 76 The district court held an
    extensive evidentiary hearing, and, as we noted in Rivera, the district court
    “having actually presided over the . . . evidentiary hearing, is in a better
    position than this court to judge and weigh credibility of the witnesses who
    testified on the extent, duration, and causes of [petitioner’s] adaptive
    76   Ex parte Briseno, 
    135 S.W.3d at 8
    .
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    functioning limitations.” 77 Here, the parties’ experts agreed that Ladd suffered
    from some degree of deficit in adaptive functioning.          The experts sharply
    disagreed as to whether these deficits were related to Ladd’s subaverage
    intellectual functioning. The district court, having heard and evaluated the
    testimony of each expert, found the State’s expert to be more persuasive.
    Considering that the district court is in the better position to reach such a
    conclusion, and that such a conclusion can be supported by the evidence, we
    find the district court’s determination plausible and thus survives clear error
    review.
    IV
    For the foregoing reasons, we AFFIRM.
    77   
    505 F.3d at 363
    .
    15