excuse defense
insanity defense
https://en.wikipedia.org/wiki/Insanity_defense
An affirmative defense by excuse in a criminal case, arguing that the defendant is not responsible for his or her actions due to an episodic or persistent psychiatric condition at the time of the criminal act.
defense of mental disorder
defense of mental illness
incapable of distinguishing right from wrong
insanity defenses
mental disorder defense
not criminally responsible by reason of insanity
not criminally responsible by reason of mental disorder