So are you saying the limo driver was in on it?
Here's my issue with a lot of these theories. You've posted videos about various possibilities. The limo driver, the "Umbrella Man," the CIA/Military, etc. You believe in the fairly improbable theories yet toss aside the physical evidence. I mean, in the link you posted above, the author believes that the Zapruder film was tampered with.
It is impossible for all of these theories to be true for one simple reason, it would require hundreds if not thousands of people to be in on it, and we are supposed to believe that in 54 years not one shred of evidence would be found or someone would have talked with all of those people involved?
Oswald's brother and wife were both certain of his quilt. His fingerprints were all over the rifle and sniper's nest. All of the ballistics match his rifle. The angles of the wounds are all consistent with the 6th floor window. The timing of the shots based on the Zapruder film are consistent with the official version. The damage to the limo is consistent with a shot from behind. JFK's and Connolly's wounds are consistent with shots from behind. The magic bullet wasn't magic it was a straight line from the 6th floor window to Connolly's thigh. It also was far from pristine. In the Zapruder film you can clearly see that JFK was hit in the head from behind. The exit wound above his right ear is clearly visible and there is no large defect on the back of his head. The doctors at Parkland and those performing the autopsy did not see a wound on the left side of his head and the xrays and autopsy photos don't show one either. A shot from the grassy knoll would have left an exit wound on the left side of his head and probably would have had to hit Jackie as well. A shot from Mooreman's position would require an entrance wound on the left side that nobody saw and the xrays and autopsy photos don't show.
The umbrella man was heckling JFK for his father's support of Neville Chamberlain. The Rorschach test dreaming up of badgeman is ridiculous. Greer's breaking of the limo coincides with him looking back to see what was happening in the Zapruder film. Almost everyone thought what they were hearing was fire crackers, it wasn't until JFK and Connolly reacted to their wounds from the second shot that people knew shots were being fired.
The so-called strange behavior of the secret service post assassination is equally ridiculous. They were the first in the history of the branch to lose their charge. There was quilt, frustration, fear for the new President, and respect for Mrs. Kennedy's wishes all in play so it isn't difficult to see why they cleaned up the car and took JFK's body back to Washington.