Whether the Fourteenth Amendment’s Due Process Clause forbids New York from requiring a murder defendant to prove the affirmative defense of extreme emotional disturbance by a preponderance of the evidence.
Holding
No. Due process permits New York to place that burden of persuasion on the defendant because extreme emotional disturbance does not negate an element of the murder offense as New York defined it.
Reasoning
Under In re Winship, the prosecution must prove beyond a reasonable doubt every fact necessary to constitute the charged crime. New York’s murder statute required proof that the defendant intended to cause death, caused a death, and that his conduct caused that result. The jury was properly told that the State bore that burden throughout the trial, and its verdict established that the State proved those elements beyond a reasonable doubt.
Extreme emotional disturbance was a separate mitigating affirmative defense, not a fact that disproved intent, causation, or death. A defendant who intentionally kills may be less culpable because of emotional disturbance, but that circumstance does not negate the facts New York selected as the elements of murder. New York could therefore require Patterson to establish the mitigating circumstance by a preponderance before reducing the offense to manslaughter.
The Court relied on Leland v. Oregon and Rivera v. Delaware, which allowed States to require defendants to prove insanity defenses after the State had proved all elements of the offense beyond a reasonable doubt. New York’s emotional-disturbance defense similarly allowed a defendant to show a mental infirmity short of insanity that mitigated culpability, while leaving the State’s proof of murder intact.
History also supported the allocation. At common law, defendants generally bore the burden of proving circumstances of justification, excuse, or mitigation, including heat of passion on sudden provocation. Although many jurisdictions had since assigned prosecutors the burden to disprove such defenses, that policy trend did not make the contrary New York rule unconstitutional.
The Court emphasized that States retain substantial authority to define crimes and allocate proof burdens for affirmative defenses. A State may choose to recognize mitigating defenses without being constitutionally required to disprove each one beyond a reasonable doubt, particularly where requiring disproof could make the defense impracticable or substantially restrict the State’s ability to punish intentional killings as murder.
That flexibility was not unlimited. A legislature may not simply declare a person guilty, presume all essential facts of guilt from an indictment or identity, or evade Winship by shifting to the defendant the burden to disprove a fact that is actually an element of the offense. But New York had not done so here because it required the State to prove every statutory element of murder beyond a reasonable doubt.