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 criminal law, self-incrimination is the act of making a statement that exposes oneself to an accusation of criminal liability or prosecution. Self-incrimination can occur either directly or indirectly: directly, by means of interrogation where information of a self-incriminatory nature is disclosed; or indirectly, when information of a self-incriminatory nature is disclosed voluntarily without pressure from another person.
In criminal law, the right to counsel means a defendant has a legal right to have the assistance of counsel and, if the defendant cannot afford a lawyer, requires that the government appoint one or pay the defendant's legal expenses. The right to counsel is generally regarded as a constituent of the right to a fair trial. Historically, however, not all countries have always recognized the right to counsel. The right is often included in national constitutions. Of the 194 constitutions currently in force, 153 have language to this effect.
In United States and Canadian law, competence concerns the mental capacity of an individual to participate in legal proceedings or transactions, and the mental condition a person must have to be responsible for his or her decisions or acts. Competence is an attribute that is decision-specific. Depending on various factors which typically revolve around mental function integrity, an individual may or may not be competent to make a particular medical decision, a particular contractual agreement, to execute an effective deed to real property, or to execute a will having certain terms.
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.
Dusky v. United States, 362 U.S. 402 (1960), was a landmark United States Supreme Court case in which the Court affirmed a defendant's right to have a competency evaluation before proceeding to trial. The Court outlined the basic standards for determining competency.
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.
Indiana v. Edwards, 554 U.S. 164 (2008), was a United States Supreme Court case in which the Court held that the standard for competency to stand trial was not linked to the standard for competency to represent oneself.
Martinez v. Court of Appeal of California, 528 U.S. 152 (2000), is a United States Supreme Court case in which the Court decided an appellant who was the defendant in a criminal case cannot refuse the assistance of counsel on direct appeals. This case is in contrast to Faretta v. California, 422 U.S. 806 (1975), which grants criminal defendants the right to refuse counsel for trial purposes.
Plea bargaining in the United States is very common; the vast majority of criminal cases in the United States are settled by plea bargain rather than by a jury trial. They have also been increasing in frequency—they rose from 84% of federal cases in 1984 to 94% by 2001. Plea bargains are subject to the approval of the court, and different States and jurisdictions have different rules. Game theory has been used to analyze the plea bargaining decision.
North v. Russell, 427 U.S. 328 (1976), is a United States Supreme Court case which held that a non-lawyer jurist can constitutionally sit in a jail-carrying criminal case provided that the defendant has an opportunity through an appeal to obtain a second trial before a judge who is a lawyer.
The United States Constitution contains several provisions regarding the law of criminal procedure.
The Assistance of Counsel Clause of the Sixth Amendment to the United States Constitution provides: "In all criminal prosecutions, the accused shall enjoy the right...to have the Assistance of Counsel for his defence."
Glasser v. United States, 315 U.S. 60 (1942), was a landmark decision of the US Supreme Court on two issues of constitutional criminal procedure. Glasser was the first Supreme Court decision to hold that the Assistance of Counsel Clause of the Sixth Amendment required the reversal of a criminal defendant's conviction if his lawyer's representation of him was limited by a conflict of interest.
Washington v. Texas, 388 U.S. 14 (1967), is a United States Supreme Court case in which the Court decided that the Compulsory Process Clause of the Sixth Amendment to the Constitution is applicable in state courts as well as federal courts. Jackie Washington had attempted to call his co-defendant as a witness, but was blocked by Texas courts because state law prevented co-defendants from testifying for each other, under the theory that they would be likely to lie for each other on the stand.
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).
In re Oliver, 333 U.S. 257 (1948), was a decision by the United States Supreme Court involving the application of the right of due process in state court proceedings. The Sixth Amendment in the Bill of Rights states that criminal prosecutions require the defendant "... to be informed of the nature and cause of the accusation...and to have the Assistance of Counsel for his defence." In this case, a witness in a Michigan grand jury hearing was convicted and sentenced to jail without either notice or attorney assistance.
McCoy v. Louisiana, 584 U.S. 414 (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.
Carter v. Kentucky was a case in which the U.S. Supreme Court held that trial judges in criminal proceedings must, upon proper request of the defendant, inform the jury of his right against self-incrimination, and that its execution may not be used against him.
Iowa v. Tovar, 541 U.S. 77 (2004), was a unanimous decision of the Supreme Court of the United States that clarified how well-informed a defendant had to be to waive their right to counsel under the Sixth Amendment. The defendant in this case had waived his right to counsel and pled guilty to drunk driving, and then had been convicted of drunk driving twice more, with sentences increasing as his convictions piled up. He argued that the judge in the first case had not explained that multiple drunk driving convictions would lead to more severe sentences, so his waiver of counsel had been invalid. The Supreme Court disagreed, saying that the judge's warnings had been adequate, and the defendants' waiver was "knowing, voluntary, and intelligent."
