Johnny "Casablanca/Keys" Simone was not involved in the Bruno hit IMO. He was involved in conspiring to overthrow Testa because he knew the play made by the Genovese to control Philly by proxy. That's why Simone reached out to Gambino Boss Paul Castellano. Trying to get Philly back under the Gambino Wing like his cousin Bruno. Big Paul was oblivious to the Genovese double cross I guess and had Johnny Keys set up for the hit.