The whole thing was a sham, Bill. Once Lee was dead and buried, they pretty much could say whatever they wanted to and the end result proves this. Hoover said they had to lead the public and K-Bach pretty much said the same thing. Even Dan Rather, supposedly NOT working for the government as an "independent" news man, started spreading the lies too on national TV Sunday night - again after Lee was dead.
It was all a very corrupt whitewash. The real truth was never going to be revealed and the murder of Oswald pretty much made their jobs very easy to do because there was no dissenting voice that we would have heard and seen during a real trial.