William Burke and William Hare

From Real Life Villains Wiki

William Burke (???? - January 28th, 1829) and William Hare (???? - ????) were two serial killers who killed 15 people in Edinburgh, Scotland, over a period of about ten months in 1828. The two men, who were from Ulster, sold the corpses of their 16 victims to Doctor Robert Knox as dissection material for his well-attended anatomy lectures. Their alleged accomplices were Burke's mistress, Helen McDougal, and Hare's wife, Margaret Laird. After they were caught in 1829, Burke was hanged, whilst Hare was able to get released without punishment.