Maybe what I'm suggesting was (literally) a cover-up lite.
Clint Hill contradicts his Warren Commission Testimony. From the 2004 National Geographic documentary Inside the U.S. Secret Service, @ 39:18 minutes in:"Above his right ear" is compatible with the autopsy images and X-rays and suggests the parietal bone.
...and yet the Zapruder film shows practically the entire upper cranium as being absent (retouching error?):...but a few frames earlier, the upper cranium intact:
That image is a close-up of JFK and Jackie, cropped from z337. It provides a deceptive appearance as if Mrs Kennedy's pink dress shows where the front half of Mr Kennedy's head is due to a change in the colour tone of the cropped image.Have a close look at z337. As one can see, the outline and darker area of the front half of the President's head are visible:
One shot, entering from behind, causing fracture lines to radiate from it. I would suggest a second shot would cause fracture lines to radiate from it. But there apparently are none.
Sorry, the image I posted earlier is over-exposed. This montage gives a clearer picture:In the frame on the left, his head is tilted away from us, yet the upper cranium appears intact.In the frame on the right, his head is more to profile and less tilted away from us. We should see the upper cranium there but it's gone.I discussed this years ago here and it was suggested that what we see here is the result of two practically simultaneous shots to the head.