Does any rational person really believe that a known felon was going to walk into secure police facility that was heavily guarded by cops that knew Ruby, at the precise time the then most infamous criminal in history exited a door from the police facility while walking between two cops, walk up to Oswald unopposed, and shoot him?

The cameraman that took the picture of Oswald wincing as he was allegedly shot said he never saw a drop of blood.

Was Oswald really killed in the ambulance on the way to hospital?

I believe Oswald shot JFK. But I do not believe he acted without principals who put him up to it.

Oswald had started his job that accorded him ability to shoot JFK two weeks prior to the murder. Coincidence? I doubt it.