Fritz Haarmann

Also known as the Butcher of Hanover and the Vampire of Hanover, because of his preferred method of killing by biting through his victim’s throat, sometimes while sodomizing them. He would then dump the bodies in the nearby river Leine. Believed to have been responsible for the murder of 27 boys and young men, he was convicted, found guilty of 24 murders and executed by guillotine in 1925.