Mirana v. Arizona (consolidated with Westover v. United States, Vignera v. New York, and California v. Stewart), 384 U.S. 436 (1966), was a landmark 5-4 decision of the United States Supreme Court which was argued February 28–March 1, 1966 and decided June 13, 1966. The Court held that both inculpatory and exculpatory statements made in response to interrogation by a defendant in police custody will be admissible at trial only if the prosecution can show that the defendant was informed of the right to consult with an attorney before and during questioning and of the right against self-incrimination prior to questioning by police, and that the defendant not only understood these rights, but voluntarily waived them.