The only thing that's ever made me think it could be a conspiracy is Ruby's killing of Oswald. Just darned odd for a member of the Jewish Mafia to make the equivalent of a suicide hit. The guy had to believe he'd get shot, pulling out a gun in front of twenty armed Dallas PD.
The truth will never be proven. Evidence has been destroyed, manufactured, walked over, etc.
Ya, but who sent Ruby and why?
And what was in it for Ruby to offset the expected “suicide by cop”?