Criminal psychologist, Walter Peterson, has spent many years interviewing criminals; from everyday crooks to the most infamous of serial killers. Through his work, Peterson has engaged some truly ghastly conversations. However these conversations provided psychological gems which only intrigued him to find out more. Such gems were frequent in interviews conducted with a serial killer named David Jacob Bruce. David Jacob Bruce was arrested on the suspicion(self admission) of killing 43 human beings. The well-spoken, British butcher was clever and open to discuss details of his crimes. He could remember a lot of his life and Peterson took a great deal of interest in Bruce. There are some notes that were made throughout the interviews however most of this text consists of dialogue, taken from recordings between the pair. WARNING: Some text will be graphic. The actions of the killer are not to be glorified. This is simply information.