The downfall of the Lucchese family was RICO and the Commission case, period. It all began with Joe Pistone, and then when the Lucchese hierarchy was imprisoned, the ensuing paranoia of Amuso and Casso while empowered with inside information on who was a confidential informant caused a purge. Amuso and Casso probably really wanted to get all of the rats out of the Lucchese family, but when they began to whack everyone, maybe even more people turned, and then RICO was then finally used on Amuso and Casso. Complete destruction.
What does Pistone have to do with the downfall of the Lucchesse's he was undercover in the Bonanno family. If your saying Pistones part in the comission case had to do with it I don't think he was all that important in the evidence for the commission case I mean yeah his work was part of it but there was a lot more important evidence in that case then what came from Pistone.
