The world has come to meet many serial killers from the very first serial killer, H.H Holmes, known in the 1800s he confessed to twenty seven murders, but who's body count could be as high as 200. To the most recent serial killer, Adam` Lanza who shot 20 children and teachers in Sandy Hook elementary school. Many of these serial killers had dark pasts and even darker secrets. Serial killers like John Wayne Gacy, Ted Bundy, Albert Fish, The Zodiac Killer, Andrei Chikatilo and Jack The Ripper are the most notorious serial killers, as well as ones that are not as well known like Fritz Haarmann, Edmund Kemper and Patrick Kearney.