In The Car.
Watching the Zapruder footage, one sees Kennedy after he was shot the first time, before the head shot. Kennedy's head is forward in response to the first shot, and Texas governor John Connelly is slightly turned, and is in the slightly sunken jump seat. When looked at this way, the Warren Commision's "magic bullet" has a perfect shot to go straight through Kennedy and Connelly. As for the "pristine bullet" it was flattened, as if it had been impacted on the side. The entrance wound on Connelly was 7.62 millimeters long, the same length as the bullets fired from Oswald's rifle. If the bullet tumbled, as full metal jacket bullets do, then it would pass through Kennedy, tumble, and hit Connelly sideways. This would flatten it. It would also greatly slow it down, explaining the lack of further signifigant damage to it. There was more slight damage to the bullet. Fragmants found in Kennedy were examined and matched to the "pristine bullet". .
The direction of Kennedy's head movement indicates a shot from behind. When objects are shot by a bullet, they tend to move backwards as often as forward. In fact, of nineteen forensic pathologists who have examined the case, only one says that Kennedy's head movements mean a frontal shot.
Conclusion: The shots that hit Kennedy came from behind, and the second shot hit both Kennedy and Connelly.
The Right Stuff.
Looking at Oswald's life the much ballyhooed motive appears. From his early life Oswald needed attention. He wanted to be in the spotlight. He tried to become a spy, but was rejected. This is probably where the KGB and/or CIA connection rumors probably originated. Oswald had serious problems. He once tried to kill an Army general in his home, but his first shot went wild, just like when he shot at Kennedy. He didn't have the guts to shot at the general a second time. He also frequently beat his Russian wife, Marina. Conclusion: Oswald was a delusional psychotic, who believed that his trial for the assassination of the President of the United States would be his stage, and the world his audience.