Miranda vs. Arizona

In Miranda v. Arizona (1966), the Supreme Court ruled that detained criminal suspects, prior to police questioning, must be informed of their constitutional right to an attorney and against self-incrimination. The case began with the 1963 arrest of Phoenix resident Ernesto Miranda, who was charged with rape, kidnapping, and robbery. Miranda was not informed of his rights prior to the police interrogation. During the two-hour interrogation, Miranda allegedly confessed to committing the crimes, which the police apparently recorded. Miranda, who had not finished ninth grade and had a history of mental instability, had no counsel present. At trial, the prosecution's case consisted solely of his confession. Miranda was convicted of both rape and kidnapping and sentenced to 20 to 30 years in prison. He appealed to the Arizona Supreme Court, claiming that the police had unconstitutionally obtained his confession. The court disagreed, however, and upheld the conviction. Miranda appealed to the U.S. Supreme Court, which reviewed the case in 1966.

The Supreme Court, in a 5-4 decision written by Chief Justice Earl Warren, ruled that the prosecution could not introduce Miranda's confession as evidence in a criminal trial because the police had failed to first inform Miranda of his right to an attorney and against self-incrimination. The police duty to give these warnings is compelled by the Constitution's Fifth Amendment, which gives a criminal suspect the right to refuse "to be a witness against himself," and Sixth Amendment, which guarantees criminal defendants the right to an attorney.

The Court maintained that the defendant's right against self-incrimination has long been part of Anglo-American law as a means to equalize the vulnerability inherent in being detained. Such a position, unchecked, can often lead to government abuse. For example, the Court cited the continued high incidence of police violence designed to compel confessions from a suspect. This and other