Liverpool-born convicted murderer John Sweeney has passed away in prison. The double murderer was known as the Canal Killer after he killed and dismembered former girlfriends. Sweeney dumped the victims' body parts in canals.
He died in jail without sharing key details regarding his offenses. Sweeney never explained what he did with his victims' heads before he passed away. The killer also died without revealing whether he had more victims. The location of the victims' heads and the full count of his victims remain unknown following his death behind bars.