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.
Powell v. Alabama, 287 U.S. 45 (1932), was a landmark United States Supreme Court decision in which the Court reversed the convictions of nine young black men for allegedly raping two white women on a freight train near Scottsboro, Alabama. The majority of the Court reasoned that the right to retain and be represented by a lawyer was fundamental to a fair trial and that at least in some circumstances, the trial judge must inform a defendant of this right. In addition, if the defendant cannot afford a lawyer, the court must appoint one sufficiently far in advance of trial to permit the lawyer to prepare adequately for the trial.
Wolf v. Colorado, 338 U.S. 25 (1949), was a United States Supreme Court case in which the Court held 6—3 that, while the Fourth Amendment was applicable to the states, the exclusionary rule was not a necessary ingredient of the Fourth Amendment's right against warrantless and unreasonable searches and seizures. In Weeks v. United States, 232 U.S. 383 (1914), the Court held that as a matter of judicial implication the exclusionary rule was enforceable in federal courts but not derived from the explicit requirements of the Fourth Amendment. The Wolf Court decided not to incorporate the exclusionary rule as part of the Fourteenth Amendment in large part because the states which had rejected the Weeks Doctrine had not left the right to privacy without other means of protection. However, because most of the states' rules proved to be ineffective in deterrence, the Court overruled Wolf in Mapp v. Ohio, 367 U.S. 643 (1961). This landmark case made history as the exclusionary rule enforceable against the states through the Due Process clause of the Fourteenth Amendment to the same extent that it applied against the federal government.
Betts v. Brady, 316 U.S. 455 (1942), was a landmark United States Supreme Court case that denied counsel to indigent defendants prosecuted by a state. The reinforcement that such a case is not to be reckoned as denial of fundamental due process was famously overruled by Gideon v. Wainwright.
Powell v. Texas, 392 U.S. 514 (1968), was a United States Supreme Court case that ruled that a Texas statute criminalizing public intoxication did not violate the Eighth Amendment protection against cruel and unusual punishment. The 5-4 decision's majority opinion was by Justice Thurgood Marshall. Justice Hugo Black and Byron White each wrote separate concurring opinions while Justice Abe Fortas dissented.
Apodaca v. Oregon, 406 U.S. 404 (1972), was a United States Supreme Court case in which the Court held that state juries may convict a defendant by a less-than-unanimous verdict in a felony criminal case. The four-justice plurality opinion of the court, written by Justice White, affirmed the judgment of the Oregon Court of Appeals and held that there was no constitutional right to a unanimous verdict. Although federal law requires federal juries to reach criminal verdicts unanimously, the Court held Oregon's practice did not violate the Sixth Amendment right to trial by jury and so allowed it to continue. In Johnson v. Louisiana, a case decided on the same day, the Court held that Louisiana's similar practice of allowing criminal convictions by a jury vote of 9–3 did not violate due process or equal protection under the Fourteenth Amendment.
Schmerber v. California, 384 U.S. 757 (1966), was a landmark United States Supreme Court case in which the Court clarified the application of the Fourth Amendment's protection against warrantless searches and the Fifth Amendment right against self-incrimination for searches that intrude into the human body. Until Schmerber, the Supreme Court had not yet clarified whether state police officers must procure a search warrant before taking blood samples from criminal suspects. Likewise, the Court had not yet clarified whether blood evidence taken against the wishes of a criminal suspect may be used against that suspect in the course of a criminal prosecution.
Michigan v. Jackson, 475 U.S. 625 (1986), was a case decided by the United States Supreme Court regarding the Sixth Amendment's right to counsel in a police interrogation. In a decision written by Justice Stevens, the Court held that once an accused individual has claimed a right to counsel at a plea hearing or other court proceeding, a waiver of that right during later police questioning would be invalid unless the accused individual initiated the communication.
Douglas v. California, 372 U.S. 353 (1963), was a case before the United States Supreme Court.
Daniels v. United States, 531 U.S. 374 (2001), was a decision by the Supreme Court of the United States involving the Armed Career Criminal Act. The Court ruled, in a 5–4 decision, that a defendant sentenced under that Act could not challenge previous convictions on appeal that were used to increase his new sentence.
Kirby v. Illinois, 406 U.S. 682 (1972), was a case decided by the Supreme Court of the United States that held that the Sixth Amendment right to counsel did not attach during a pre-indictment identification.
United States v. Wade, 388 U.S. 218 (1967), was a case decided by the Supreme Court of the United States that held that a criminal defendant has a Sixth Amendment right to counsel at a lineup held after indictment.
Taylor v. Illinois, 484 U.S. 400 (1988), is a United States Supreme Court decision in which the Court held that defense witnesses can be prevented from testifying under certain circumstances, even if that hurts the defense's case. Taylor was the first case to hold that there is no absolute bar to blocking the testimony of a surprise witness, even if that is an essential witness for the defendant, a limitation of the broad right to present a defense recognized in Washington v. Texas (1967).
Elkins v. United States, 364 U.S. 206 (1960), was a US Supreme Court decision that held the "silver platter doctrine", which allowed federal prosecutors to use evidence illegally gathered by state police, to be a violation of the Fourth Amendment to the United States Constitution.
Chaidez v. United States, 568 U.S. 342 (2013), was a United States Supreme Court case that determined that the ruling in Padilla v. Commonwealth of Kentucky could not be applied retroactively, because the Padilla case applied a new rule to the Sixth Amendment to the United States Constitution. Padilla v. Kentucky held that the Sixth Amendment made it mandatory for criminal defense attorneys to advise non-citizen clients about the deportation risks of a guilty plea. While Padilla v. Kentucky was a case related to immigration and deportation, Justice Scalia worried that there was "no logical stopping point" to how Padilla v. Commonwealth of Kentucky can be applied. Justice Scalia wondered if the same logic could be extended and applied to numerous other cases, and felt it would be impossible for attorneys to make sure any client was informed of all the potential legal consequences post trial.
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.
Ramos v. Louisiana, 590 U.S. ___ (2020), was a U.S. Supreme Court decision in which the Court ruled that the Sixth Amendment to the U.S. Constitution requires that guilty verdicts for criminal trials be unanimous. Only cases in Oregon were affected by the ruling because every other state already had this requirement. The decision incorporated the Sixth Amendment requirement for unanimous jury criminal convictions against the states, and thereby overturned the Court's previous decision from the 1972 case Apodaca v. Oregon and Johnson v. Louisiana.
Edwards v. Vannoy, 593 U.S. ___ (2021), was a United States Supreme Court case involving the Court's prior decision in Ramos v. Louisiana, 590 U.S. ___ (2020), which had ruled that jury verdicts in criminal trials must be unanimous under the Sixth Amendment to the U.S. Constitution. The Supreme Court ruled 6–3 that Ramos did not apply retroactively to earlier cases prior to their verdict in Ramos.
Johnson v. Louisiana, 406 U. S. 356 (1972), was a court case in the U.S. Supreme Court involving the Due Process clause and Equal protection clause of the Fourteenth Amendment to the United States Constitution. The U.S. Supreme Court ruled that the Louisiana law that allowed less-than unanimous jury verdicts to convict persons charged with a felony, does not violate the Due Process clause. This case was argued on a similar basis as Apodaca v. Oregon.
