Chief Justice Warren’s Opinion, 1966

The circumstances surrounding in-custody interrogation can operate very quickly to overbear the will of one merely made aware of his privilege by his interrogators. Therefore, the right to have counsel present at the interrogation is indispensable to the protection of the Fifth Amendment privilege under the system we delineate today.

Chief Justice Warren’s Opinion 1966

Chief Justice Warren’s opinion cited the coercive tactics used by police as one of the bases for his argument that a confession is not admissible as evidence unless the suspect has been informed of his or her rights and has a lawyer present during an interrogation.

National Archives, Records of the Supreme Court of the United States