Why would Sheeran have murdered Hoffa?
There seems to be no real reason that Sheeren would have been involved, or involved himself in, Hoffa's murder. Clearly they were friendly and Sheeren had benefited hugely from knowing and being with Hoffa.
Now, the Mafia could have threatened to kill him if he did not go the killing. But then why would he not have told his whole story? Maybe his Mafia buddies told him if he talked they would kill him or all the members of his family.
Or, maybe Sheeren was lying and pretending to be friends with Hoffa during all this time?
If there is no truth to this movie, what is the point? If it does not have anything new or useful to say? It's as useless as the JFK movie by Oliver Stone.