518 U.S. 37 (1996), Supreme Court of the United States
Montana v. Egelhoff is a leading Supreme Court decision at the intersection of criminal law's culpability requirements and constitutional due process.
Does the Due Process Clause of the Fourteenth Amendment prohibit a state from excluding evidence of a defendant's voluntary intoxication on the issue of whether the defendant possessed the requisite mens rea for a criminal offense?
Under the Due Process Clause, a state violates fundamental fairness only when it offends a principle of justice so rooted in the traditions and conscience of our people as to be ranked as fundamental. States retain broad power to define the elements of crimes, allocate burdens, and set the relevance of evidence pertaining to those elements. There is no fundamental due process right to have a jury consider voluntary intoxication on the question of whether the defendant formed the requisite mens rea. Under the controlling concurrence, a state may, as a matter of substantive criminal law, define mental states to be assessed without regard to voluntary intoxication; such a definition does not unconstitutionally shift the burden of proof or violate the right to present a defense.
No. The Court held that Montana may, consistent with the Due Process Clause, bar consideration of voluntary intoxication in determining whether a defendant possessed the requisite mens rea for an offense. The judgment of the Montana Supreme Court was reversed.
Montana v. Egelhoff is central to understanding legislative authority over culpability and the constitutional limits of evidentiary exclusion in criminal cases. It validates, as a matter of federal constitutional law, statutes that restrict or abolish the voluntary intoxication defense, and it is frequently cited to uphold laws barring intoxication evidence to negate mens rea for specific-intent crimes. Doctrinally, the case illustrates the 'fundamental principles of justice' test in substantive due process challenges to evidentiary and criminal law rules and demonstrates the importance of Marks analysis in fractured Supreme Court decisions. For students, Egelhoff is a keystone in analyzing the right to present a defense, the state's burden to prove mens rea, and the line between evidentiary rules and substantive definitions of offenses.