There were not so many "secret informers" who were made back in the old days. Scarpa yes, but on Lombardozzi there is no proof, just a few people online who started the ball rolling. For the most part there was little ratting. Look at all the unsolved murders, scores made, and how many old timers (Carlo Gambino, Accardo,
and others never were imprisoned despite massive all-out efforts by the fBI and police to imprison them. ON Gambino the only thing they had was a group of junkies who did a robbery and agreed to say Gambino planned it with them. The did not get Genovese into prison through mafia members, but through a small time Puerto Rican who lied on the stand and said Genovese backed him on a deal.