Liverpool-born serial killer John Sweeney has passed away in prison. The double murderer was dubbed the Canal Killer after he killed and mutilated former girlfriends. Sweeney disposed of the victims' remains in canals.
He died in jail without revealing key details regarding his offenses. Sweeney never disclosed what he did with his partners' heads before he died. The killer also passed away without confirming whether he had more victims. The whereabouts of the victims' heads and the full count of his victims stay unsolved following his death in custody.