I don't agree with it being Freddo, because in the movie when he was explaining himself to Michael he weeps and says "I swear I didn't know it was a hit, I swear Mikey" I think it was the people who were shooting Michael, annd Freddo shot them, and I am convinced that Michael didn't set up Franky five angels because, why would Mike want Frank outta the picture, he was a help, it was Roth he wanted dead because he smelt a rat. It was Roth, he wanted Frank dead because Frank would advise Michael to go against him and he just told Frank before he died that Mike was responsible to leave him with that thought when he died.