An excerpt from page 121 of Mortal Error.
……….Finally, Donahue found a statement made by S M Holland. Holland was a rail traffic supervisor with the Union Terminal Co. He had watched the motorcade come down Elm St from atop the triple overpass, and he’d received considerable attention due to his claim that he’d seen a puff of smoke on the grassy knoll at the time of the shooting. Holland’s observations about the Secret Service agent appeared in The Scavengers and Critics of the Warren Report , a 1967 book Donahue had read some years before:
Interviewer: After the second time he was hit, what did the Secret Service men do?
Holland: Well, i noticed that this Secret Service man stood up in the car, in the President’s car.
Interviewer: When did he stand up in the car?
Holland: Just about the same time the President was shot the second time. He jumped up in the seat and was standing up in the, on the seat. Now I actually thought when they started up, I actually thought he was shot, too, because he fell backwards just like he was shot, but it jerked him down when they started off.
Interviewer: What did he do when he stood up?
Holland: He pointed this machine gun right towards that grassy knoll behind that picket fence.
Holland was transfixed. Holland had put the gun in the agent’s hands at the moment the last shot was fired and said the agent then fell over………..