Riggins v. Nevada, 504 U.S. 127, 13 (1992)

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Cite as: 504 U. S. 127 (1992)

Kennedy, J., concurring in judgment

my view that absent an extraordinary showing by the State, the Due Process Clause prohibits prosecuting officials from administering involuntary doses of antipsychotic medicines for purposes of rendering the accused competent for trial, and to express doubt that the showing can be made in most cases, given our present understanding of the properties of these drugs.

At the outset, I express full agreement with the Court's conclusion that one who was medicated against his will in order to stand trial may challenge his conviction. When the State commands medication during the pretrial and trial phases of the case for the avowed purpose of changing the defendant's behavior, the concerns are much the same as if it were alleged that the prosecution had manipulated material evidence. See Brady v. Maryland, 373 U. S. 83, 87 (1963) (suppression by the prosecution of material evidence favorable to the accused violates due process); Arizona v. Young-blood, 488 U. S. 51, 58 (1988) (bad-faith failure to preserve potentially useful evidence constitutes a due process violation). I cannot accept the premise of Justice Thomas' dissent that the involuntary medication order comprises some separate procedure, unrelated to the trial and foreclosed from inquiry or review in the criminal proceeding itself. To the contrary, the allegations pertain to the State's interference with the trial. Thus, review in the criminal proceeding is appropriate.

I also agree with the majority that the State has a legitimate interest in attempting to restore the competence of otherwise incompetent defendants. Its interest derives from the State's right to bring an accused to trial and from our holding in Pate v. Robinson, 383 U. S. 375, 378 (1966), that conviction of an incompetent defendant violates due process. Unless a defendant is competent, the State cannot put him on trial. Competence to stand trial is rudimentary, for upon it depends the main part of those rights deemed essential to a fair trial, including the right to effective assistance of coun-

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