Original sentence: Zapruder added that he had assumed the shots came from behind him not only because the President's head went backwards from the fatal shot, but also that the wound on the side of the President's head was facing that direction
Edited sentence: Zapruder added that he had assumed the shots came from behind him not only because the President's head went backwards from the fatal shot, but also that the explosive wound on the side of the President's head was facing that direction