Miranda Rights were established in 1966. That was the year in which the Supreme Court handed down the decision in the case called Miranda v. Arizona. In that case, Ernesto Miranda had been convicted of rape. The conviction was made largely on the basis of his confession. Miranda had confessed after a lengthy questioning in police custody. He had not been informed of his right to an attorney before he confessed. Miranda appealed the conviction on the grounds that the confession should not have been used in court against him because he did not know about his rights. The Supreme Court agreed with him and established the rule that police officers must read people what we now call their “Miranda rights” when they are arrested and questioned. So, these rights were established by the Supreme Court in 1966.