The elements, or requirements, necessary to find heat of passion voluntary manslaughter are: 1) the victim provoked the defendant, 2) the provocation caused the defendant to act rashly and under the influence of intense emotion, obscuring his judgment and reasoning, and 3) the provocation would have caused the average person to act rashly.
Not everything a victim does can be sufficiently provocative that it will support a voluntary manslaughter conviction (as opposed to murder). Acts that may constitute adequate provocation (depending on the circumstances) include:
1. A violent physical attack by the victim.
2. Mutual combat or a fight between the defendant and victim, as long as the defendant did not start the fight.
3. The victim's murder of a member of the defendant's family.
4. A spouse's adultery.
Check out this post for examples of acts that will not justify reduction of murder to voluntary manslaughter.
For more in-depth information about the differences between murder and voluntary manslaughter, check out this article.
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