I don't think that film was altered.
It shows enough that should convince anyone that the major wound to the head was just like most folks described as they saw it.
JFK was struck between the right eye and the right ear.
Perhaps an instant before that shot was a bullet square to the back of the head that caused a slight forward bob.
It is a wonder that the film wasn't "LOST".
Hi Jerry,
I think people mistook/mistake the large skull flap hanging over the temple and side of the head, in front of-and over the ear for the head wound.
The massive exit hole is on top of the head, and the large skull flap is still attached to head by scalp. Mrs. Kennedy put the loose skull back into place on the way to Parkland-and I base this on what she told Theodore White within 7 days of the assassination, during her interview with him. She said that she was "I kept trying to keep the top of his head down...maybe I could keep it (his brain) in".