Definitely wasn't all Flemmi, it was the 2 of them feeding off eachother. They're informants, the files prove it. They're plan didn't go write with the immunity clause, so Stevie dumped it all on Whitey cause hes bitter he was locked up while Whitey was on the run, plain and simple. They both killed those women, its easy to know that. Stevie had plenty on the Italians, they loved him, Larry Baione wanted him and Salemme, but Flemmi stayed with with Winter Hill. And his brother Jimmy was never a made man, freelance hitman, who first worked with the Bennet brothers and did his own thing and became a partner of Barboza. He wouldnt have ever been made into the family especially back during those days, they never would have taken a loose cannon like Jimmy the bear.