[Lancey Howard]

the fact remains that the fatal shot came from the rear.

"Graphic" is right.
So, the other shot, which came from the front, was non-fatal?

[FreedomCalls]

Here is the Nix footage:

It shows a shot from the rear better than Zapruder.

http://mcadams.posc.mu.edu/hargis.rm

[Wolfstar]

There is no shot that came from the front. The head wound was fatal. The wound in the back that exited through the president's throat may have been survivable.