Hes talking about Angelo Gagliano brother I think, I don't remember his name, but was not an informant but a witness. There is rumors that Joe Gagliano was an informant, but he was not, it was one of his guys who was.

"I have this Nightmare. I'm on 5th avenue watching the St. Patrick's Day parade and I have a coronary and nine thousand cops march happily over my body." Chief Sidney Green