Child Rapist/Killer, Albert Fish

One of the more heinous serial killers I've researched, Albert Fishs demented, depraved, sexually deviant attacks on children in the 1920s and 30s are a thing of nightmares. His crime spree lasted decades, having not been arrested until he was in his 60s. Its suspected his number of victims goes far beyond what he admitted to, but we'll sadly never know.