Stanfa had a lot of protection from any reprisal on the Bruno hit. Giancarlo is right on the mark as Stanfa was very close to Rosario Gambino. Not too sure who he had in Sicily, but I believe they are related to the Gambino's which would explain why John or Joe Gambino had a sit down with Castellano for a pass on Stanfa's life, as Bruno and Castellano had a great business relationship between the two families. Paul sent word to Salerno of the Genovese and Corallo of the Lucchese crime families about not touching Stanfa. How Martorano did not get killed I have no ideal.