As entertainment the movie was decent. But in my opinion it's just one bullshit story after another like him killing the Nino Gaggi character in the movie.

As far as i know there is no proof the Iceman even knew DeMeo let alone killed for him. Yes he was probably at the Gemini a few times but so were alot of other people. I don't believe Roy ever used him for any hit. He just tried hitching his wagon to DeMeo's in my opinion for the extra hitman cred. No doubt Kuklinski was a killer but i think they were all local guys he was doing business with or had a grudge against.

At the end of the movie it said something like foul play was suspected in Kuklinski's death after he named a former Gambino underboss in a murder case. Who would give a shit about Gravano being framed? Nobody. If anything they would of loved to see Sammy go down on a bullshit story like the Iceman most likely made up.