An autopsy report noted that Lewis had nail marks on both sides of his neck when he died and had suffered partial strangulation. His death was ruled accidental because there was no evidence he attempted to kill himself or had been pushed. The actor who was the lone suspect in the killing of his landlady did not have drugs in his system when he died, according to an autopsy report released Thursday.Police believe Lewis fell while trying to flee the home after killing Davis, 81, who operated a retreat for writers and actors out of her home.