The Most Prominent Serial Killer in History

Peter Woodcock spent 35 years in a Canadian psych hospital after he had killed three people. Robert Picton was angry that he wasn't American and fed like his victims to his pigs. Harold Frederick Fred Shipman is supposedly the most prolific serial killer in known history. Louis Alfredo Gabarito Cubillos raped and murdered 140 boys, but they suspect as many as 300.