Washington's prohibition on assisted suicide is constitutional. Decided June 26, 1997 (argued January 8, 1997). Opinion of the Court: William Rehnquist → go there Topic: End of life. Washington v. Glucksberg, 521 U.S. 702 (1997), is a landmark decision of the U.S. Supreme Court, which unanimously held that a right to assisted suicide was not protected by the Due Process Clause. Wiki link