"Giancana was shot in the back of the head on 19 June 1975 while frying Italian sausage and peppers in the basement of his home in Oak Park, Illinois. After falling, his body was turned over and shot a further six times in the face and chin. It was believed by investigators that his murderer was a close friend whom he had let into the house. At the time he was scheduled to appear before a Senate committee investigating CIA and Mafia collusion in plots to assassinate Fidel Castro.
Some have alleged that the CIA was responsible for the shooting as Giancana had a somewhat troubled history with the agency. However, former CIA Director William Colby has been quoted as saying, "We had nothing to do with it."
Most investigators believe that Joey Aiuppa, Giancana's onetime friend and successor as Chicago Outfit boss, was responsible for ordering the hit on the disgraced former Godfather."
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