One thing for sure, the only group that could have kept their mouths shut all this time would be the mob.
It looks like it might be true—The Mob invented the “Double Hit” Oswald kills the President or is part of the plot. A second man—with terminal cancer—kills Oswald-—then dies. All the lose ends tied up in a nice bundle. I wonder why? Some say it because the Kennedy brothers killed Maryln Monroe (because she had JFK’s baby aborted and was a bout to go public with it). Or it could be payback for letting Cuba go Communist. Next big mystery—how RFK was killed?
Roger that. They specialize in silence.