The Sixth Amendment to the United States Constitution sets forth rights related to criminal prosecutions. It was ratified in 1791 as part of the United States Bill of Rights. The Supreme Court has applied all but one of this amendment's protections to the states through the Due Process Clause of the Fourteenth Amendment.
In common law jurisdictions, an acquittal means that the criminal prosecution has failed to prove that the accused is guilty beyond a reasonable doubt of the charge presented. It certifies that the accused is free from the charge of an offense, as far as criminal law is concerned. The finality of an acquittal is dependent on the jurisdiction. In some countries, such as the United States, an acquittal prohibits the retrial of the accused for the same offense, even if new evidence surfaces that further implicates the accused. The effect of an acquittal on criminal proceedings is the same whether it results from a jury verdict or results from the operation of some other rule that discharges the accused. In other countries, like Australia and the UK, the prosecuting authority may appeal an acquittal similar to how a defendant may appeal a conviction — but usually only if new and compelling evidence comes to light or the accused has interfered with or intimidated a juror or witness.
United States v. Dominguez Benitez, 542 U.S. 74 (2004), was a United States Supreme Court case in which the Court ruled that, in a criminal proceeding in federal court, a defendant who does not alert the district court to a possible violation of Rule 11 of the Federal Rules of Criminal Procedure must show on appeal that the violation affirmatively affected his rights in order to obtain reversal of his conviction by guilty plea. Rule 11, which pertains to criminal prosecutions in United States federal courts only, governs the offering of plea bargains to criminal defendants and the procedures district courts must employ to ensure that the defendant knows of and properly waives his trial-related constitutional rights.
Skinner v. State of Oklahoma, ex rel. Williamson, 316 U.S. 535 (1942), is a unanimous United States Supreme Court ruling that held that laws permitting the compulsory sterilization of criminals are unconstitutional as it violates a person's rights given under the 14th Amendment of the United States Constitution, specifically the Equal Protection Clause and the Due Process Clause. The relevant Oklahoma law applied to "habitual criminals" but excluded white-collar crimes from carrying sterilization penalties.
Hartman v. Moore, 547 U.S. 250 (2006), is a decision by the Supreme Court of the United States involving the pleading standard for retaliatory prosecution claims against government officials. After a successful lobbying attempt by the CEO of a manufacturing company against competing devices that the US Postal Service supported, the CEO found himself the target of an investigation by US postal inspectors and a criminal prosecution that was dismissed for lack of evidence. The CEO then filed suit against the inspectors and other government officials for seeking to prosecute him in retaliation for exercising his First Amendment rights to criticize postal policy. The Court ruled 5-2 that to prove that the prosecution was caused by a retaliatory motive, the plaintiff bringing such a claim must allege and prove that the criminal charges were brought without probable cause.
Faretta v. California, 422 U.S. 806 (1975), was a case in which the Supreme Court of the United States held that criminal defendants have a constitutional right to refuse counsel and represent themselves in state criminal proceedings.
McKaskle v. Wiggins, 465 U.S. 168 (1984), is a United States Supreme Court case in which the court considered the role of standby counsel in a criminal trial where the defendant conducted his own defense. In this case the defendant claimed his Sixth Amendment right to present his own case in a criminal trial was violated by the presence of a court-appointed standby counsel.
Fellers v. United States, 540 U.S. 519 (2004), is a United States Supreme Court case regarding the Sixth Amendment's right to counsel.
Frisbie v. Collins, 342 U.S. 519 (1952), is a decision by the United States Supreme Court, holding that kidnapping of a defendant by State authorities for the purpose of taking a suspect from one jurisdiction to another for criminal trial, is constitutional. The defendant was tried in Michigan after being abducted by Michigan authorities in Chicago, Illinois. The case relied upon Ker v. Illinois (1886). The Ker–Frisbie doctrine, continues to be used to uphold convictions based on illegal arrests.
United States v. White, 401 U.S. 745 (1971), was a United States Supreme Court decision which held that recording conversations using concealed radio transmitters worn by informants does not violate the Fourth Amendment protection against unreasonable searches and seizures, and thus does not require a warrant.
United States v. Valenzuela-Bernal, 458 U.S. 858 (1982), is a United States Supreme Court case that determined the constitutionality of deporting aliens who might give testimony in criminal alien smuggling prosecutions. Because deporting alien witnesses might take away a testimony that would be both “material and favorable” to the defendant, it gives rise to a potential motion from the defense to dismiss the indictment under the Compulsory Process Clause of the Sixth Amendment and the Due Process Clause of the Fifth Amendment.
The United States Constitution contains several provisions regarding the law of criminal procedure.
The Marshall Court (1801–1835) heard forty-one criminal law cases, slightly more than one per year. Among such cases are United States v. Simms (1803), United States v. More (1805), Ex parte Bollman (1807), United States v. Hudson (1812), Cohens v. Virginia (1821), United States v. Perez (1824), Worcester v. Georgia (1832), and United States v. Wilson (1833).
The Crimes Act of 1825, formally titled An Act more effectually to provide for the punishment of certain crimes against the United States, and for other purposes, was the first piece of omnibus federal criminal legislation since the Crimes Act of 1790. In general, the 1825 act provided more punishment than the 1790 act. The maximum authorized sentence of imprisonment was increased from 7 to 10 years; the maximum fine from $5,000 to $10,000. But, the punishments of stripes and pillory were not provided for.
Klopfer v. North Carolina, 386 U.S. 213 (1967), was a decision by the United States Supreme Court involving the application of the Speedy Trial Clause of the United States Constitution in state court proceedings. The Sixth Amendment in the Bill of Rights states that in criminal prosecutions "...the accused shall enjoy the right to a speedy trial" In this case, a defendant was tried for trespassing and the initial jury could not reach a verdict. The prosecutor neither dismissed nor reinstated the case but used an unusual procedure to leave it open, potentially indefinitely. Klopfer argued that this denied him his right to a speedy trial. In deciding in his favor, the Supreme Court incorporated the speedy trial protections of the Sixth Amendment against the states.
FEC v. National Conservative PAC, 470 U.S. 480 (1985), was a decision by the Supreme Court of the United States striking down expenditure prohibitions of the Federal Election Campaign Act of 1971 (FECA), which regulates the fundraising and spending in political campaigns. The FECA is the primary law that places regulations on campaign financing by limiting the amount that may be contributed. The Act established that no independent political action committee may contribute more than $1,000 to any given presidential candidate in support of a campaign.
Class v. United States, 583 U.S. ___ (2018), is a Supreme court decision related to the ability to challenge the constitutionality of a federal law if the defendant has already pleaded guilty.
United States v. Haymond, 588 U.S. ___ (2019), is a case in which the U.S. Supreme Court struck down the five-year mandatory minimum prison sentence for certain sex offenses committed by federal supervised releases under 18 U.S.C. § 3583(k) as unconstitutional unless the charges are proven to a jury beyond a reasonable doubt. Justices Ginsburg, Sotomayor, and Kagan joined Gorsuch's plurality opinion, while Breyer provided the necessary fifth vote with his narrow concurrence that began by saying he agreed with much of Justice Alito's dissent, which was joined by Justices Roberts, Thomas, and Kavanaugh.
Kentucky v. Stincer, 482 U.S. 730 (1987), was a United States Supreme Court case in which the Court held that the respondent's rights under the Confrontation Clause of the Sixth Amendment were not violated by his exclusion from the competency hearing.
United States v. Taylor, 596 U.S. ___ (2022), was a United States Supreme Court case in which the Court held that an attempted Hobbs Act robbery does not qualify as a "crime of violence" under 18 U.S.C. § 924(c)(3)(A) because no element of the offense requires proof that the defendant used, attempted to use, or threatened to use force.
