that part literally came on just a few seconds ago...cici says that was no heart attack, and frankie 5 angels cuts him directly off adn goes "thats why im here, to talk to mike about this rossatoo brothers buisness"

im guessing from how it went down that they had somethign to do with his death...whether they mean to say that either they killed him, or that clemanza died froma heart attack from all the obvious stress of dealign with them?