I agree if for no other reason that at that time there were not the ex-Special OPS guys out for hire. No doubt this was a very sophisticate hit for sure!
Not the Hoffa hit IMO, but definitely Roselli and Giancana. They were directly tied into CIA efforts to kill Castro. Roselli had allegedly already given testimony before the Senate implicating the CIA and U.S. government. And Giancana was about to within a week of his murder..... so yes, IMO they were both whacked out by the U.S. Government to kill that investigation.
