Gideon v. Wainwright, 372 U.S. 335 (1963), was a landmark U.S. Supreme Court decision in which the Court ruled that the Sixth Amendment of the U.S. Constitution requires U.S. states to provide attorneys to criminal defendants who are unable to afford their own. The case extended the right to counsel, which had been found under the Fifth and Sixth Amendments to impose requirements on the federal government, by imposing those requirements upon the states as well.
In United States law, ineffective assistance of counsel (IAC) is a claim raised by a convicted criminal defendant asserting that the defendant's legal counsel performed so ineffectively that it deprived the defendant of the constitutional right guaranteed by the Assistance of Counsel Clause of the Sixth Amendment to the United States Constitution. Ineffectiveness claims may only be brought where the defendant had the right to counsel, ordinarily during the critical stages of a prosecution.
The Supreme Court of the United States handed down sixteen per curiam opinions during its 2005 term, which lasted from October 3, 2005, until October 1, 2006.
Johnson v. Zerbst, 304 U.S. 458 (1938), was a United States Supreme Court case, in which the petitioner, Johnson, had been convicted in federal court of feloniously possessing, uttering, and passing counterfeit money in a trial where he had not been represented by an attorney but instead by himself. Johnson filed for habeas corpus relief, claiming that his Sixth Amendment right to counsel had been violated, but he was denied by both a federal district court and the court of appeals.
United States v. Gonzalez-Lopez, 548 U.S. 140 (2006), is a United States Supreme Court ruling that the erroneous deprivation of a defendant's attorney of choice entitles him to a reversal of his conviction under the Sixth Amendment to the United States Constitution.
Strickland v. Washington, 466 U.S. 668 (1984), was a landmark Supreme Court case that established the standard for determining when a criminal defendant's Sixth Amendment right to counsel is violated by that counsel's inadequate performance.
Wiggins v. Smith, 539 U.S. 510 (2003), is a case in which the United States Supreme Court spelled out standards for "effectiveness" in the constitutional right to legal counsel guaranteed by the Sixth Amendment. Previously the court had determined that the Sixth Amendment included the right to "effective assistance" of legal counsel, but it did not specify what constitutes "effective", thus leaving the standards for effectiveness vague. In Wiggins v. Smith, the court set forth the American Bar Association Guidelines for the Appointment and Performance of Defense Counsel in Death Penalty Cases Guideline 11.8.6.(1989), as a specific guideline by which to measure effectiveness and competence of legal counsel.
Douglas v. California, 372 U.S. 353 (1963), was a case before the United States Supreme Court.
The Supreme Court of the United States handed down nineteen per curiam opinions during its 2009 term, which began on October 5, 2009, and concluded October 3, 2010.
The Supreme Court of the United States handed down eight per curiam opinions during its 2014 term, which began October 6, 2014 and concluded October 4, 2015.
The Supreme Court of the United States handed down eighteen per curiam opinions during its 2015 term, which began October 5, 2015 and concluded October 2, 2016.
Reyes Mata v. Lynch, 576 U.S. 143 (2015), is a United States Supreme Court case in which the Court ruled that the federal courts of appeals have jurisdiction to review the orders of the Board of Immigration Appeals to reject motions to reopen.
The Supreme Court of the United States handed down nine per curiam opinions during its 2016 term, which began October 3, 2016 and concluded October 1, 2017.
Bell v. Cone, 535 U.S. 685 (2002), was a Supreme Court of the United States case that upheld a death sentence despite the defendant's argument that he should not be sentenced to death because he was suffering from drug-induced psychosis when he committed the crimes. Cone also argued that he was denied effective assistance of counsel because his attorney failed to present sufficient mitigating evidence during the sentencing phase of his trial and that his attorney inappropriately waived his final argument during the sentencing phase. In an 8–1 opinion written by Chief Justice William Rehnquist, the United States Supreme Court denied Cone's petition for a writ of habeas corpus. The Court held that the actions taken by Cone's attorney during the sentencing phase were "tactical decisions" and that the state courts that denied Cone's appeals did not unreasonably apply clearly established law. Justice John Paul Stevens wrote a dissenting opinion in which he argued that Cone was denied effective assistance of counsel because his attorney failed to "subject the prosecution's case to meaningful adversarial testing."
Lafler v. Cooper, 566 U.S. 156 (2012), was a United States Supreme Court case in which the Court clarified the Sixth Amendment standard for reversing convictions due to ineffective assistance of counsel during plea bargaining. The Court ruled that when a lawyer's ineffective assistance leads to the rejection of a plea agreement, a defendant is entitled to relief if the outcome of the plea process would have been different with competent advice. In such cases, the Court ruled that the Sixth Amendment requires the trial judge to exercise discretion to determine an appropriate remedy.
McCoy v. Louisiana, 584 U.S. ___ (2018), was a United States Supreme Court case in which the Court held the Sixth Amendment guarantees a defendant the right to decide that the objective of his defense is to maintain innocence at all costs, even when counsel believes that admitting guilt offers the defendant the best chance to avoid the death penalty.
The Supreme Court of the United States handed down ten per curiam opinions during its 2019 term, which began October 7, 2019 and concluded October 4, 2020.
Kimmelman v. Morrison, 477 U.S. 365 (1986), was a decision of the U.S. Supreme Court that clarified the relationship of the right to effective assistance of counsel under the Sixth Amendment to other constitutional rights in criminal procedure. In this case, evidence against the defendant was probably seized illegally, violating the Fourth Amendment, but he lost the chance to argue that point due to his lawyer's ineffectiveness. The prosecution argued that the defendant's attempt to make a Sixth Amendment argument via a habeas corpus petition was really a way to sneak his Fourth Amendment argument in through the back door. The Court unanimously disagreed, and held that the Fourth Amendment issue and the Sixth Amendment issue represented different constitutional values, and had different requirements for prevailing in court, and therefore were to be treated separately by rules of procedure. Therefore, the habeas corpus petition could go forward. In its opinion, the Court also gave guidance on how to apply its decisions in Stone v. Powell and Strickland v. Washington.
Shinn v. Ramirez, 596 U.S. ___ (2022), was a case decided by the United States Supreme Court related to the Antiterrorism and Effective Death Penalty Act of 1996. The court held that new evidence that was not in the state court's records, based on ineffective assistance of post-conviction council, could not be used in an appeal to a federal court.
Martinez v. Ryan, 566 U.S. 1 (2012), was a United States Supreme Court case which considered whether criminal defendants ever have a right to the effective assistance of counsel in collateral state post-conviction proceedings. The Court held that a procedural default will not bar a federal habeas court from hearing ineffective-assistance-of-trial-counsel if there was no counsel or ineffective counsel in an initial-review collateral proceeding.
