Mullaney v. Wilbur
| Mullaney v. Wilbur | |
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| Argued January 15, 1975 Decided June 9, 1975 |
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| Full case name | Mullaney v. Wilbur |
| Citations | 421 U.S. 684 (more)
95 S. Ct. 1881; 44 L. Ed. 2d 508; 1975 U.S. LEXIS 70
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| Prior history | On writ of certiorari to the United States Court of Appeals for the First Circuit |
| Court membership | |
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| Case opinions | |
| Majority | Powell, joined by unanimous |
| Concurrence | Rehnquist, joined by Burger |
Mullaney v. Wilbur, 421 U.S. 684 (1975), is a criminal case in which a unanimous court struck down a state statute requiring a defendant to prove the defense of provocation to downgrade a murder conviction to manslaughter. Previous common law, such as in Commonwealth v. York (1845), allowed such burden on the defense.
Maine's statute defined murder as unlawfully killing with malice, with malice defined as deliberate and unprovoked cruelty, and added that killings were presumed to be unprovoked unless the defense proved provocation by a preponderance of the evidence.Justice Powell delivered the opinion for the court that provocation was a crucial part of the charge in that it determined "the degree of culpability attaching to the criminal homicide".
States were able to circumvent this decision by careful wording, as in Patterson v. New York, in which provocation, or "extreme emotional disturbance", was classified as an allowable defense excuse, not as a listed element.
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