Is evil in the stool? Listening to serial killers the only real common theme is an inexplicable urge to kill. Donald Gaskins described it as a rolling pressure in his gut that came up once a month. Many other serial killers have no explanation other than a desperate urge to kill.

Is it time to stop interviewing killers post capture and start sampling their stool? I would bet good money that Ted Bundy has a similar microbiome to Albert Fish.

Why would bacteria use people as puppets this way?