No there is nothing to show Clemenza was a junkie...quite the opposite. The "official" version of his demise was that it was a heart attack, however WIllie Cicci is emphatic it was "no heart attack" that killed him. The consensus on the boards has always been it was the pressure the Rosatos put on him, but I would not rule out their having had a more direct hand in his demise.....maybe they fed him to death!