Thurgood Marshall, Ford v. Wainwright — Opinion of the Court (1986)
“ Now that the Eighth Amendment has been recognized to affect significantly both the procedural and the substantive aspects of the death penalty, the question of executing the insane takes on a wholly different complexion. The adequacy of the procedures chosen by a State to determine sanity, therefore, will depend upon an issue that this Court has never addressed: whether the Constitution places a substantive restriction on the State's power to take the life of an insane prisoner. ”
