A single homicide is such a commonplace occurrence today that it hardly merits attention from the hardened eyes of the public, but periodically the world still gets shaken by gruesome mass murders. There are few psychiatric studies available dealing with the subject of violent mass murder. The purpose of this paper is to study one man named Bill, who on 28 September 1964, using a heavy double bladed axe, struck and killed his wife and five step-children in less than 10 minutes. A sixth child was killed sometime later with a shotgun.