A person is guilty of aggravated mayhem when he or she unlawfully, under circumstances manifesting extreme indifference to the physical or psychological well-being of another person, intentionally causes permanent disability or disfigurement of another human being or deprives a human being of a limb, organ, or member of his or her body. For purposes of this section, it is not necessary to prove an intent to kill. Aggravated mayhem is a felony punishable by imprisonment in the state prison for life with the possibility of parole.