It seems that Ruby not only knew many personnel at the Dallas Police Dept. which made it easier for him to get in the room where Oswald was being told that he was being charged with the shooting deaths of JFK and Tippit and also gets him in the front row area which gives him access to be able to Shoot Oswald in the stomach area . It was irrefutable that Jack Ruby had Mafia ties and as for the so called single bullet that supposedly went through JFK and John C , well , that dog just don't hunt !