Everything points to the FBI and Police, if Gambino or anyone else was involved, why were they never charged? Greg Scarpa was right there, and he was secretly working with the FBI at the time. As was by stated by another person earlier, the police and FBI were all over the place and had nothing to offer afterwards. I looked through old news clippings once, and the Gambino and Joe Gallo rumors were put out by LE as soon as Columbo was shot. News stories with "Leaks" from LE said they had all sorts of information linking various others as behind the shooting. Yet no hard facts were ever presented, no indictments handed down.