The slayer statute and insanity.

It is common law that persons cannot benefit from their crimes. For this reason, most states have enacted slayer rules that prevent a killer from sharing in the victim's estate. However, terms in the slayer rules, such as willful and unlawful, can be difficult to apply, as illustrated by the situation in which a slayer is found not guilty by reason of insanity. The Washington Supreme Court has recently addressed whether a man who killed his mother and was then found not guilty by reason of insanity in criminal court can inherit a portion of his mother's estate.