Cullotta is a rat, end of story. Very small parts of Marino are based on him, but in reality he never was responsible for bringing the skim back to Chicago or anywhere else. He was Spilotro's lackey-boy, and flipped long before Tony was killed. He didn't even get to do any real damage to the outfit because Spilotro was the only one he had real interactions with, and when he died, there went any use for Cullotta
Did you read his book, he more or less asserts what you're saying (only brought the skim back once or twice, pretty much Tony's errand boy, etc)
Scorsese likes to mix these stories up a bit, ya know?
Also...what does him being a rat have to do with anything?
