For A Round Hole, Chapter 13. It generally would be found to have had a patch of blood soaked tissue or bone lying on the shirt to produce such a stain as this. The Doctors at Parkland would not have even noticed it in their haste to remove the clothes from the President. The fact that there are no other areas of like stain on the shirt is also of much interest. Again, a bone chip from the vertebra could have produced such a stain.
Many theories start with the premise of a shot to the throat from the front.
The sidewalk, the bushes in front of the fence on the grassy knoll, the storm drain. The first and third came from the second floor of the Dal. Building and the fourth came from the grassy knoll. Kennedy's x-rays reveal that the first bullet struck the first thoracic vertebrae and from all indications, the wing of this vertebrae is missing. We know for a fact that a bullet did not penetrate his neck.