Postelle v. Carpenter, 901 F.3d 1202

Background

On Memorial Day 2005 Gilbert Postelle and others executed a planned attack that killed four people; a jury convicted him of four counts of first-degree murder and one count of conspiracy and sentenced him to death.
Postelle presented mitigation at sentencing emphasizing severe childhood abuse, long-term methamphetamine use, and expert testimony (Dr. Ruwe) about neurocognitive impairments and borderline intellectual functioning; IQ tests in 2006–2007 produced scores of 79 and 76.
Postelle later argued the Flynn Effect (secular rise in IQ norms) would reduce his scores to the low-70s, potentially affecting Atkins eligibility and mitigation weight; counsel did not present Flynn Effect evidence at trial or on direct appeal.
State courts (OCCA) rejected Postelle’s claims on direct and collateral review; the federal district court denied habeas relief; Postelle appealed to the Tenth Circuit.
The Tenth Circuit majority affirmed denial of habeas relief, holding (1) trial counsel’s omission of Flynn Effect evidence was not deficient or prejudicial under Strickland given the record and context; (2) appellate counsel was not ineffective for failing to raise a meritless claim; and (3) erroneously admitted victim-impact statements were harmless.

Issues

Issue	Plaintiff's Argument	Defendant's Argument	Held
Trial counsel ineffective for failing to present Flynn Effect evidence as mitigation (and for Atkins eligibility)	Postelle: counsel should have adjusted IQ for Flynn Effect to show scores <75, aiding Atkins exemption and strengthening mitigation	State/OCCA: Flynn Effect irrelevant to statutory Atkins cutoff; presentation could be strategic and would likely prompt contested expert battle	Held: No Strickland relief — counsel not shown deficient; omission not prejudicial given strong mitigation and countervailing evidence; OCCA decision reasonable under AEDPA
Appellate counsel ineffective for not raising trial counsel’s Flynn Effect omission on direct appeal	Postelle: appellate counsel should have challenged trial counsel’s failure to use Flynn Effect	State: claim would have been meritless in light of precedent (Smith) and OCCA rulings; no Strickland prejudice	Held: No ineffective-assistance-on-appeal — raising the issue would have been futile; AEDPA deference applies
Admission of victim-impact testimony in penalty phase violated Eighth Amendment (Booth/Payne) and prejudiced sentence	Postelle: family statements describing disfigurement and circumstances were impermissible characterizations and influenced jury to impose death	State: similar facts and forensic/guilt-phase evidence already established victims’ injuries and circumstances	Held: Court agreed some statements violated Booth but applied harmless-error analysis (Brecht) and found no substantial or injurious effect on sentencing
Motion to expand COA / stay & abate or amend petition based on brother’s confession (actual innocence)	Postelle: new confession from brother David warranted stay/abatement or leave to amend/exhaust actual-innocence claim	State: confession unreliable, not newly reliable evidence; procedural rules do not permit stay to exhaust claims not already presented; amendment would not relate back	Held: Denied COA expansion; district court’s procedural rulings not reasonably debatable; confession insufficient to show more-likely-than-not innocence

Key Cases Cited

Strickland v. Washington, 466 U.S. 668 (1984) (two-prong ineffective-assistance framework: deficient performance and prejudice)
Atkins v. Virginia, 536 U.S. 304 (2002) (death penalty unconstitutional for intellectually disabled defendants)
Lockett v. Ohio, 438 U.S. 586 (1978) (sentencer must consider any relevant mitigating evidence)
Eddings v. Oklahoma, 455 U.S. 104 (1982) (sentencer must consider defendant's mental and background evidence as mitigating)
Hall v. Florida, 572 U.S. 701 (2014) (IQ score is an approximation; states must account for standard error in Atkins analysis)
Payne v. Tennessee, 501 U.S. 808 (1991) (victim-impact evidence admissible; Booth limited as to victim characterizations/opinions)
Brecht v. Abrahamson, 507 U.S. 619 (1993) (harmless-error standard for habeas review requires showing substantial and injurious effect)
Williams v. Taylor, 529 U.S. 362 (2000) (counsel must investigate and present available mitigation; inadequate investigation can be prejudicial)
Wiggins v. Smith, 539 U.S. 510 (2003) (failure to discover and present mitigating evidence undercuts reliability of death sentence)
Rompilla v. Beard, 545 U.S. 374 (2005) (counsel's failure to examine available records can constitute deficient investigation)
Rhines v. Weber, 544 U.S. 269 (2005) (stay-and-abeyance doctrine applicable to mixed petitions under limited conditions)
Harrington v. Richter, 562 U.S. 86 (2011) (deference to state-court adjudication under AEDPA; burden on petitioner to show no reasonable basis for state decision)