One shot his grandmother in the head, murdered his grandfather, and decapitated six female hitchhikers before fulfilling his years-long fantasy of bludgeoning his own mother to death with a claw hammer and beheading her. Another slaughtered dozens of women, disposed of some of them in a meat grinder, and fed others to pigs.
It sounds like the plot of a horror movie but this is in fact, true crime. Edward Kemper and Robert William Pickton were among the world's most notorious serial killers. While we'd like to think there haven't been many, one database lists more than 5,000 confirmed serial killers - most of them from the United States. Perhaps even scarier is that experts believe hundreds, if not thousands, have gone undetected, and therefore, were never caught.
People have been sharing macabre, disturbing, and surprising facts about some of the serial killers who once roamed free. Bored Panda has put together a list of the most fascinating and creepy ones. Many of the tales might have you sleeping with one eye open, if you even manage to sleep at all.
