Yet another reason, albeit a rather minor one, to conclude that there was only one shot to that point, as the 1........2...3 pattern necessarily requires. As couple of dozen witnesses, including Brehm, observed, JFK reacted to the first shot.
Interesting choice of a witness to bolster this theory. Brehm is originally a two shot witness. Brehm is a perfect example of “the medias influence inflating the number of shots” that the Warren Commission and HSCA both state in their conclusions.
Even when Charles Brehm later adds a third shot to the narrative. The second shot he mentions is the head shot.
DALLAS TIMES HERALD: November 22, 1963
The witness Brehm was shaking uncontrollably as he further described the shooting. "The first shot must not have been too solid, because he just slumped. Then on the second shot he seemed to fall back." Brehm seemed to think the shots came from in front of or beside the President. He explained the President did not slump forward as if he would have after being shot from the rear. The book depository building stands in the rear of the President's location at the time of the shooting.
FBI REPORT: November 24, 1963. 22H837
When the President's automobile was very close to him and he could see the President's face very well, the President was seated, but was leaning forward when he stiffened perceptibly at the same instant what appeared to be a rifle shot sounded. According to Brehm, the President seemed to stiffen and come to a pause when another shot sounded and the President appeared to be badly hit in the head. Brehm said when the President was hit by the second shot, he could notice the President's hair fly up, and then roll over to his side, as Mrs. Kennedy was apparently pulling him in that direction. Brehm said that a third shot followed and that all three shots were relatively close together. ... He also stated that it seemed quite apparent to him that the shots came from one of two buildings back at the corner of Elm and Houston Streets.