If he betray only Gotti it won't be enough to get away with 19 murders. Btw I don't feel bad for the people he killed, they were also mobsters and killers, don't think they are some kind of saints. The worst is for their families, but here I'm talking about Cosa Nostra, the rules, and when a tough guy, and a stand up mobster becomes a rat. And what you say here of course you wouldn't say it in front of him, if I could I would ask him some questions, not judge him, this is the way the world runs, no one can change it, there are mobsters, police, crime, fair business, everything, this is the world we live in, don't judge people, cause they don't even care... And as for the society, Gravano made a favor for the people who were racketeered and threatened, and killed, but they continue to call him rat. There is a limit, Cosa Nostra got rules, when the bosses break the rules, you can break them too - become a rat, and put them in jail for the rest of their lives.