Eighty-seven years ago bookie Joe "Big Mac" Mahoney had a falling out with his partner John Quigley. In better days they both hung out at the same restaurant but since the break up Mahoney was asked to stay away. He did until this date back then.
Mahoney entered the place and started talking to Quigley, talk turned to arguing which lead physical contact. "Big Mac" drew a .32 and Quigley started to wrestle with him pinning his arm behind his back and that's when the gun went off and Mahoney fell. That was Quigley's story anyways, Mahoney never got back up so we don't know his version.