Successful ineffective assistance of counsel cases at the Supreme Court cluster around a small number of recurring failures: capital defense lawyers who never investigated their client’s life history before sentencing, lawyers who gave wrong advice about plea offers or deportation, lawyers who hired experts they knew were unqualified, and lawyers who abandoned clients on appeal. Every winning claim had to clear the same two-part test set in Strickland v. Washington, 466 U.S. 668 (1984): deficient performance, and a reasonable probability that the outcome would have been different without the error.1Justia. Strickland v. Washington, 466 U.S. 668 That test is deliberately hard to meet. One study of more than 2,300 federal habeas petitions found a 0% success rate on ineffective assistance claims.2Columbia Law School. Ineffective Assistance of Counsel The cases below are the exceptions, and they show what kind of lawyering the Court has been willing to call constitutionally inadequate.
The Test Every Winning Claim Had to Satisfy
Under Strickland, a defendant must prove two things. First, that counsel’s performance fell below “an objective standard of reasonableness,” measured against prevailing professional norms and with strong deference to the lawyer’s judgment. Second, that there is “a reasonable probability that, but for counsel’s unprofessional errors, the result of the proceeding would have been different” — a probability sufficient to undermine confidence in the outcome, not a showing that a different result was more likely than not.3Constitution Annotated. Sixth Amendment – Ineffective Assistance of Counsel Courts are “highly deferential” to counsel and presume competence, and the defendant carries the burden on both prongs.4Cornell Law Institute. Ineffective Assistance of Counsel
David Washington himself lost. His lawyer’s tactical decision not to request a presentence report or present psychiatric evidence at his capital sentencing was found reasonable, and the Court concluded the outcome would not have changed.1Justia. Strickland v. Washington, 466 U.S. 668 The test he lost under is the same test every later winner had to pass.
The Narrow Shortcut: When Prejudice Is Presumed
In United States v. Cronic, 466 U.S. 648 (1984), decided the same day as Strickland, the Court identified three narrow situations where prejudice is presumed and the defendant does not have to prove it:
- Complete denial of counsel at a critical stage of the proceedings.
- Counsel present but entirely failing to subject the prosecution’s case to meaningful adversarial testing.
- Circumstances so extreme that no competent lawyer could have provided effective assistance, as in Powell v. Alabama, where defendants met their lawyers minutes before a capital trial.5Justia. United States v. Cronic, 466 U.S. 648
Successful Cronic claims are rare. The failure must be “entire,” and courts apply the categories strictly rather than blending them into a looser standard. When a case doesn’t fit squarely into one of the three, the full Strickland analysis applies.5Justia. United States v. Cronic, 466 U.S. 648
The Biggest Winning Category: Failure to Investigate Mitigation in Capital Cases
The most reliable way defendants have won ineffective assistance claims is by showing that their capital-sentencing lawyer never investigated the client’s background before deciding what evidence to present. The principle running through every one of these cases is the same: a lawyer cannot make a reasonable strategic choice to forgo mitigating evidence without first investigating enough to know what that evidence would show.
Williams v. Taylor (2000)
Terry Williams was sentenced to death in Virginia. His lawyers waited until a week before sentencing to prepare and put on only two neighbors and a psychiatrist. They never found records showing a “nightmarish” childhood of abuse and neglect, borderline intellectual disability with possible organic brain damage, or Williams’s record as a model prisoner who helped break up a drug ring and returned a guard’s missing wallet.6Justia. Williams v. Taylor, 529 U.S. 362 Counsel later admitted the failure wasn’t strategic but stemmed from a mistaken belief about records access and unreturned witness calls.7Library of Congress. Williams v. Taylor, 529 U.S. 362 The Court found both Strickland prongs met and reversed.8Cornell Law Institute. Williams v. Taylor, 529 U.S. 362
Wiggins v. Smith (2003)
Kevin Wiggins’s Maryland attorneys knew from a presentence report and social services records that his mother was an alcoholic and he had been in foster care. They stopped investigating there. They never hired a forensic social worker, which was standard practice in Maryland capital cases, even though state funds were available. A fuller investigation would have surfaced severe physical and sexual abuse, homelessness, and diminished mental capacity.9Cornell Law Institute. Wiggins v. Smith, 539 U.S. 510 In a 7–2 decision, the Court held the limited investigation was not a strategic choice but the product of inattention, citing ABA guidelines and emphasizing that strategic decisions are only “virtually unchallengeable” when made after a thorough investigation.10O’Connor Institute. Wiggins v. Smith Counsel had promised the jury a look at who Wiggins was and then delivered none.11Oyez. Wiggins v. Smith
Rompilla v. Beard (2005)
Ronald Rompilla’s Pennsylvania prosecutor announced plans to prove a “significant history of felony convictions” by introducing the file from a prior rape and assault conviction. Defense counsel knew this and never examined the file, which was a public record in the same courthouse where the trial was held.12Justia. Rompilla v. Beard, 545 U.S. 374 The file contained leads to school, medical, and prison records documenting severe childhood abuse, long-term alcohol abuse, and evidence of organic brain damage and fetal alcohol syndrome. Counsel had relied on interviews with Rompilla and his family, who denied any such history, and on three mental health experts who never requested the prior records.13U.S. Department of Justice. Rompilla v. Beard – Amicus Merits The Court held that once the prosecution flags a specific prior conviction as an aggravator, reading that file is constitutionally required.
Porter v. McCollum (2009)
George Porter, a Korean War veteran sentenced to death in Florida, had a penalty-phase attorney who met with him briefly once, obtained no school, medical, or military records, interviewed no family members, and ignored competency evaluations that referenced military service and childhood abuse.14Justia. Porter v. McCollum, 558 U.S. 30 The judge and jury heard “almost nothing that would humanize Porter.” A real investigation would have surfaced combat at Kunu-ri and Chip’yong-ni, two Purple Hearts, a Presidential Unit Citation, brain abnormalities, cognitive deficits, and a history of childhood physical abuse. The Florida Supreme Court had brushed the military record aside because Porter had periods of being AWOL. The U.S. Supreme Court called that reasoning an unreasonable application of Strickland and reversed.15Equal Justice Initiative. Supreme Court Holds Counsel Must Investigate Mitigation in Death Penalty Case
Sears v. Upton (2010)
Sears is important because counsel had actually put on mitigation — seven witnesses portraying Demarcus Sears as having a stable, middle-class upbringing. The investigation, though, was cursory, relying only on witnesses his mother selected. Postconviction counsel found parental abuse, sexual abuse by a relative, and significant frontal lobe damage from childhood head injuries.16Equal Justice Initiative. Supreme Court Affirms Importance of Counsel in Death Penalty Case The Georgia court agreed the investigation was inadequate but denied relief on the theory that a “reasonable” mitigation theory had been presented. The Supreme Court rejected that shortcut. Prejudice requires courts to reweigh the total mitigating evidence — presented and undiscovered — against the aggravation.17Library of Congress. Sears v. Upton, 561 U.S. 945
Andrus v. Texas (2020)
Terence Andrus’s Texas trial counsel performed almost no mitigation investigation. He didn’t interview family members, didn’t prepare witnesses, and called Andrus’s mother as a defense witness only to have her turn hostile.18Justia. Andrus v. Texas, 590 U.S. ___ The uninvestigated evidence included a mother who sold drugs and engaged in prostitution while leaving her children unsupervised, extreme neglect and trauma, affective psychosis, and a juvenile facility placement at sixteen involving gang violence, extended solitary confinement, and suicidal ideation. A state trial court found ineffective assistance; the Texas Court of Criminal Appeals reinstated the death sentence. In a 6–3 per curiam opinion, the Supreme Court vacated, saying counsel “not only neglected to present [mitigating evidence]; he failed even to look for it.”19Death Penalty Information Center. Supreme Court Orders Texas Court to Reconsider Case of Inadequate Representation
Winning Claims Outside Capital Sentencing
Ineffective assistance claims also succeed at the Supreme Court in a range of non-capital contexts, usually where a specific, concrete lawyer error had clear consequences for the client’s decision or the outcome.
Bad Advice That Made a Client Reject a Plea: Lafler v. Cooper (2012)
Anthony Cooper’s lawyer told him to reject a plea offer of 51 to 85 months, claiming the state couldn’t prove intent to murder because the victim had been shot below the waist. Cooper went to trial, was convicted on all counts, and received 185 to 360 months.20Justia. Lafler v. Cooper, 566 U.S. 156 The 5–4 Court held that a fair trial does not “wipe clean” ineffective assistance during plea bargaining. Justice Kennedy called the criminal justice system primarily a system of pleas, not trials. The state was ordered to reoffer the plea.21U.S. Sentencing Commission. Supreme Court Case Summaries
A Plea Offer the Lawyer Never Mentioned: Missouri v. Frye (2012)
Decided the same day as Lafler, Missouri v. Frye involved a defense attorney who received two formal plea offers and communicated neither. The offers lapsed, and Galin Frye later pleaded guilty without a deal, receiving three years. The Court held that counsel has a constitutional duty to relay formal plea offers, and that failing to do so is deficient performance. Prejudice requires showing a reasonable probability the plea would have been accepted by both the defendant and the court.21U.S. Sentencing Commission. Supreme Court Case Summaries
Wrong Advice About Deportation: Padilla v. Kentucky (2010)
Jose Padilla, a lawful permanent resident and Vietnam War veteran, pleaded guilty to transporting marijuana after his attorney told him the conviction would not affect his immigration status. It made his deportation virtually mandatory. Kentucky had held that immigration consequences were “collateral” and outside counsel’s duty. The Supreme Court reversed. Deportation is so closely tied to the criminal process that it can’t be labeled merely collateral. When immigration consequences are clear, counsel must give correct advice; when the law is less clear, counsel must at least warn that the charge may carry immigration consequences.22Justia. Padilla v. Kentucky, 559 U.S. 356
A Deportation-Driven Guilty Plea: Lee v. United States (2017)
Jae Lee, a South Korean national who had lived in the U.S. as a lawful permanent resident for 35 years, repeatedly asked his lawyer whether pleading guilty to an ecstasy charge would trigger deportation. His lawyer said no. The conviction was an aggravated felony under the Immigration and Nationality Act, making deportation mandatory.23Oyez. Lee v. United States The Sixth Circuit found no prejudice because Lee likely would have been convicted at trial anyway. The 6–2 Court rejected that reasoning. The prejudice question in a plea case is not whether the defendant would have been acquitted but whether, properly advised, he would have gone to trial. For Lee — with two businesses, elderly parents in the U.S., and no ties to South Korea — the Court said it was not irrational to risk a slightly longer sentence for even a small chance of avoiding deportation.24Supreme Court of the United States. Lee v. United States
Hiring an Expert the Lawyer Knew Was Weak: Hinton v. Alabama (2014)
Anthony Ray Hinton spent nearly thirty years on Alabama’s death row for two 1985 murders. The prosecution’s entire case rested on a claim that bullets from the crime scenes matched a revolver found at his home. His lawyer wanted a ballistics expert but wrongly believed Alabama law capped expert funding at $1,000. The statute had actually been amended to allow reimbursement for “any expenses reasonably incurred,” and the trial judge had invited counsel to ask for more.25Cornell Law Institute. Hinton v. Alabama Because of the imagined budget, counsel hired someone he himself considered ineffective, who was discredited on cross. In a unanimous per curiam opinion, the Court said “an attorney’s ignorance of a point of law that is fundamental to his case combined with his failure to perform basic research on that point is a quintessential example of unreasonable performance under Strickland.”26American Bar Association. U.S. Supreme Court Finds Alabama Lawyer Constitutionally Negligent
Introducing Racial Bias Through the Defense’s Own Expert: Buck v. Davis (2017)
At Duane Buck’s Texas capital sentencing, defense counsel called Dr. Walter Quijano to testify on future dangerousness. Quijano concluded Buck was unlikely to be dangerous, but his report and testimony stated that Buck’s race — Black — was associated with an increased probability of future dangerousness. The prosecution cross-examined him on it and referenced it in closing.27Harvard Law Review. Buck v. Davis Chief Justice Roberts, for the 6–2 majority, wrote that “no competent defense attorney would introduce evidence that his client is liable to be a future danger because of his race.” Evidence introduced by a defendant’s own lawyer carries particular weight with jurors, and the Court found a reasonable probability that race contributed to the death sentence.28Supreme Court of the United States. Buck v. Davis, 580 U.S. ___
Refusing to File a Requested Appeal: Garza v. Idaho (2019)
Gilberto Garza asked his lawyer to file a notice of appeal. The lawyer refused because Garza had signed an appeal waiver in his plea agreement. In a 6–3 decision, Justice Sotomayor wrote that filing a notice of appeal is “a purely ministerial task” and that the decision to appeal belongs to the defendant. Prejudice is presumed when counsel fails to file a requested notice of appeal, and that presumption applies even where the defendant signed an appeal waiver, because such waivers are not absolute bars to all appellate claims.29Justia. Garza v. Idaho, 586 U.S. ___
Never Filing a Suppression Motion: Kimmelman v. Morrison (1986)
In an early Strickland application, counsel failed to file a Fourth Amendment suppression motion — not as strategy, but because he had done no pretrial discovery and didn’t know about the search or the evidence the state planned to use. The Court called this “unmitigated negligence” outside prevailing professional norms. Kimmelman also established that a defendant can bring a Sixth Amendment ineffective assistance claim on federal habeas even when the underlying error involves a Fourth Amendment issue that would otherwise be barred from habeas review.30Justia. Kimmelman v. Morrison, 477 U.S. 365
No Minimum for Sentencing Prejudice: Glover v. United States (2001)
Some lower courts had required that any extra prison time caused by counsel’s error be “significant” to qualify as Strickland prejudice. In Glover v. United States, Paul Glover’s attorney failed to contest the grouping of his sentencing counts, producing a prison term 6 to 21 months longer than it should have been. The Seventh Circuit called that too small to matter.31Justia. Glover v. United States, 531 U.S. 198 The Supreme Court unanimously reversed: “any amount of actual jail time has Sixth Amendment significance.” There is no minimum threshold for sentencing-based prejudice.32Cornell Law Institute. Glover v. United States, 531 U.S. 198
Getting a Defaulted Claim Heard: Martinez and Maples
Many ineffective assistance claims fail before anyone looks at their merits, because a lawyer missed a deadline or skipped an argument in state post-conviction proceedings. Two 2012 decisions carved out room for defaulted claims to be heard.
Martinez v. Ryan (2012)
Some states, including Arizona, forbid raising ineffective assistance claims on direct appeal and require them to be brought in a separate collateral proceeding. Luis Mariano Martinez’s post-conviction lawyer failed to raise his trial-counsel claim at all, defaulting it under the rule from Coleman v. Thompson. The 7–2 Court, in an opinion by Justice Kennedy, created a narrow equitable exception: when state law channels ineffective assistance claims into a first collateral proceeding, a procedural default won’t bar federal habeas review if the petitioner had no counsel or ineffective counsel in that initial proceeding, and the underlying trial-counsel claim is “substantial.”33Oyez. Martinez v. Ryan
Maples v. Thomas (2012)
Cory Maples, an Alabama death row inmate, was represented pro bono by two associates at Sullivan & Cromwell in New York. Both left the firm without telling Maples or the court. When his post-conviction petition was denied, the court’s notice went to the firm’s mailroom and was returned unopened. Maples never learned the appeal deadline was running, and it passed. Justice Ginsburg, writing for the majority, held that Maples had been “abandoned” by counsel, which is not the ordinary attorney negligence that defendants normally must bear. That abandonment furnished cause to excuse the procedural default.34American Bar Association. U.S. Supreme Court Grants Relief
What the Winners Have in Common
Across four decades of Supreme Court decisions, the ineffective assistance claims that succeed share a small set of features. The error is a documented failure to do something concrete rather than a debatable tactical judgment — no investigation at all, an unread file in the courthouse, a plea offer never conveyed, wrong advice about a legal rule the lawyer never bothered to look up. The evidence counsel missed or the option counsel foreclosed is powerful and specific: severe childhood abuse, brain damage, combat service, a plea offering years less prison, mandatory deportation the client would have gone to trial to avoid. And the case is one where the missed evidence could plausibly have changed a juror’s mind or a client’s decision, rather than one so overwhelming that no lawyering would have mattered.
Capital sentencing cases dominate the list, and that isn’t accident. The stakes draw better post-conviction resources, and juries choosing between life and death are the fact-finders most likely to be moved by a fuller picture of the defendant’s life. Outside that context, the winning claims tend to involve a single, sharp, identifiable failure — an unfiled appeal, an uncommunicated plea, an unqualified expert hired on a phantom budget — where the harm to the defendant is easy to see and hard to relabel as strategy.