The Antiterrorism and Effective Death Penalty Act of 1996 (AEDPA), Pub. L.Tooltip Public Law 104–132 (text)(PDF), 110 Stat. 1214, enacted April 24, 1996, was introduced to the United States Congress in April 1995 as a Senate Bill. The bill was passed with broad bipartisan support by Congress in response to the bombings of the World Trade Center and Oklahoma City. It was signed into law by President Bill Clinton.
Gregg v. Georgia, Proffitt v. Florida, Jurek v. Texas, Woodson v. North Carolina, and Roberts v. Louisiana, 428 U.S. 153 (1976), is a landmark decision of the U.S. Supreme Court. It reaffirmed the Court's acceptance of the use of the death penalty in the United States, upholding, in particular, the death sentence imposed on Troy Leon Gregg. The set of cases is referred to by a leading scholar as the July 2 Cases, and elsewhere referred to by the lead case Gregg. The court set forth the two main features that capital sentencing procedures must employ in order to comply with the Eighth Amendment ban on "cruel and unusual punishments". The decision essentially ended the de facto moratorium on the death penalty imposed by the Court in its 1972 decision in Furman v. Georgia 408 U.S. 238 (1972). Justice Brennan dissent famously argued that "The calculated killing of a human being by the State involves, by its very nature, a denial of the executed person's humanity... An executed person has indeed 'lost the right to have rights."
Schriro v. Summerlin, 542 U.S. 348 (2004), was a case in which the United States Supreme Court held that a requirement that a different Supreme Court decision requiring the jury rather than the judge to find aggravating factors would not be applied retroactively.
Dobie Gillis Williams was an American criminal in Louisiana who was convicted of the murder of Sonja Knippers in 1984, and sentenced to death. He was executed in 1999. His case has been controversial.
The Supreme Court of the United States handed down six per curiam opinions during its 2004 term, which began October 4, 2004 and concluded October 3, 2005.
Walton v. Arizona, 497 U.S. 639 (1990), was a United States Supreme Court case that upheld two important aspects of the capital sentencing scheme in Arizona—judicial sentencing and the aggravating factor "especially heinous, cruel, or depraved"—as not unconstitutionally vague. The Court overruled the first of these holdings in Ring v. Arizona, 536 U.S. 584 (2002). The second of these holdings has yet to be overturned.
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.
Panetti v. Quarterman, 551 U.S. 930 (2007), is a decision by the Supreme Court of the United States, ruling that criminal defendants sentenced to death may not be executed if they do not understand the reason for their imminent execution, and that once the state has set an execution date death-row inmates may litigate their competency to be executed in habeas corpus proceedings. This decision reaffirmed the Court's prior holdings in Ford v. Wainwright, and Stewart v. Martinez-Villareal.
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.
Bigby v. Dretke 402 F.3d 551, the U.S. Court of Appeals for the Fifth Circuit heard a case appealed from the United States District Court for the Northern District of Texas on the issue of the instructions given to a jury in death penalty sentencing. The decision took into account the recent United States Supreme Court decisions concerning the relevance of mitigating evidence in sentencing, as in Penry v. Lynaugh.
Tennard v. Dretke, 542 U.S. 274 (2004), was a United States Supreme Court case in which the court was asked whether evidence of the defendant's low IQ in a death penalty trial had been adequately presented to the jury for full consideration in the penalty phase of his trial. The Supreme Court held that not considering a defendant's low IQ would breach his Eighth Amendment rights and constitute a cruel and unusual punishment.
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.
Penry v. Johnson, 532 U.S. 782 (2001), is a United States Supreme Court case which concerned whether instructions given to a Texas jury were constitutionally adequate to emphasize the mitigating factors in sentencing of defendants who are intellectually disabled The Texas courts had determined the sentencing instructions were consistent with prior Supreme Court jurisprudence, but the Court in a divided decision reversed, finding the sentencing instructions insufficient. This was the second time Penry's case made it to the Supreme Court.
The United States Constitution contains several provisions regarding the law of criminal procedure.
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."
Cone v. Bell, 556 U.S. 449 (2009), was a case in which the United States Supreme Court held that a defendant was entitled to a hearing to determine whether prosecutors in his 1982 death penalty trial violated his right to due process by withholding exculpatory evidence. The defendant, Gary Cone, filed a petition for postconviction relief from a 1982 death sentence in which he argued that prosecutors violated his rights to due process under the Fourteenth Amendment by withholding police reports and witness statements that potentially could have shown that his drug addiction affected his behavior. In an opinion written by Justice John Paul Stevens, the Supreme Court held that Cone was entitled to a hearing to determine whether the prosecution's failure to disclose exculpatory evidence violated Cone's right to due process; the Court noted that "the quantity and the quality of the suppressed evidence lends support to Cone’s position at trial that he habitually used excessive amounts of drugs, that his addiction affected his behavior during his crime spree". In 2016, Gary Cone died from natural causes while still sitting on Tennessee's death row.
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.
Lockhart v. Fretwell, 506 U.S. 364 (1993), is a decision of the United States Supreme Court which held that failure to make an objection under Collins v. Lockhart did not constitute undue prejudice required by Strickland v. Washington, because the error did not cause a fundamentally unfair trial, as opposed to merely a different outcome of the case.
Tyler v. Cain, 533 U.S. 656 (2001) is a United States Supreme Court case in which the Court held that the rule established under Cage v. Louisiana (1990), where the Court held certain jury instructions unconstitutional because the words used did not suggest the degree of proof required by the "beyond a reasonable doubt" standard, was not "made retroactive to cases on collateral review by the Supreme Court." Tyler is the primary case regarding the retroactivity of new rules to successive habeas petitions.
Brown v. Davenport, 596 U.S. ___ (2022), was a case decided by the United States Supreme Court. The case concerned whether habeas relief may be granted if the Brecht v. Abrahamson test alone is satisfied, or if the application of Chapman v. California by the state courts was unreasonable because of AEDPA. The court held that federal courts can not grant habeas relief when state courts have already ruled on a prisoner's claim, unless the situation satisfies the test laid out in Brecht v. Abrahamson, and the test laid out in AEDPA.
