A state violates due process by involuntarily committing a criminal defendant for an indefinite period of time solely on the basis of their permanent incompetency to stand trial on the charges filed against them. Decided June 7, 1972 (argued November 18, 1971). Opinion of the Court: Harry Blackmun → go there Applied: the Eighth Amendment → go there Applied: the Fourteenth Amendment → go there Topic: Restrictions on involuntary commitment. Jackson v. Indiana, 406 U.S. 715 (1972), is a landmark decision of the United States Supreme Court that determined a U.S. state violated due process by involuntarily committing a criminal defendant for an indefinite period of time solely on the basis of his permanent incompetency to stand trial on the charges filed against him. Wiki link