Roy H. Kellerman, Special Agent, Secret Service, sitting in the front passenger seat in the JFK limo, said at the Warren Commission that the fatal head-shot was shot-2, & that shot-2 was a part of a flurry of at least 2 almost simultaneous shots.
The word flurry (ie an auto burst) came up 22 times during Kellerman's testimony. Here are some snippets.
https://mcadams.posc.mu.edu/russ/testimony/kellerma.htmMr. KELLERMAN. Yes. Good. There was enough for me to verify that the man was hit. So, in the same motion I come right back and grabbed the speaker and said to the driver, "Let's get out of here; we are hit," and grabbed the mike and I said, "Lawson, this is Kellerman,"--this is Lawson, who is in the front car. "We are hit; get us to the hospital immediately." Now, in the seconds that I talked just now,
a flurry of shells come into the car. I then looked back and this time Mr. Hill, who was riding on the left front bumper of our followup car, was on the back trunk of that car; the President was sideways down into. the back seat.
Mr. KELLERMAN. But
after the flurry of shots, I recall her saying, "What are they doing to you?" Now again, of course, my comparison of the voice of her speech--certainly, I have heard it many times, and in the car there was conversation she was carrying on through shock, I am sure.
Mr. SPECTER. Now, in your prior testimony you described
a flurry of shells into the car. How many shots did you hear after the first noise which you described as sounding like a firecracker?
Mr. KELLERMAN. Mr. Specter,
these shells came in all together.
Mr. SPECTER. Are you able to say how many you heard?
Mr. KELLERMAN. I am going to say two, and it was like a double bang--
bang, bang.
Mr. SPECTER. You mean now two shots in addition to the first noise?
Mr. KELLERMAN. Yes, sir; yes, sir;
at least.Mr. KELLERMAN. Let me give you an illustration, sir, before I can give you an answer. You have heard the sound barrier, of a plane breaking the sound barrier,
bang, bang? That is it.
Mr. KELLERMAN. Our car accelerated immediately on the time-at the time--
this flurry of shots came into it.
Mr. SPECTER. Can you describe
the sound of the flurry of shots by way of distinction with the way you have described the sound of the first shot?
Mr. KELLERMAN. Well, having heard all types of guns fired, most of them, rather, if I recall correctly these were two sharp reports, sir. Again, I am going to refer to it as like a plane going through a sound barrier; bang, bang.
Mr. SPECTER. Now, you are referring to the
flurry?
Mr. KELLERMAN. That is right.
Mr. SPECTER.
Did it sound differently from the first noise you have described as being a firecracker?
Mr. KELLERMAN.
Yes; definitely; very much so.Mr. SPECTER. You have testified about the impression you had as to the source of the first shot, which sounded to you like a firecracker. Did you have any impression as to the source of the other shots, which you described as being a
flurry?.................
Mr. SPECTER. The question which I had then started to ask you was whether you had any impression at the time of the second and third shots, which you described as
a flurry of shots, as to the point of origin or source of those shots.
Mr. KELLERMAN. The only answer I can give to that is that they would have to come from the rear.
Mr. SPECTER. Well, is that the impression or reaction you had at the time of the
flurry?
Mr. KELLERMAN. That is right, sir.
Kellerman's testimony covered his needs, (1) there was no very early shot (a very early shot would require an explanation of why no early action had been taken), (2) there were 3 shots (this made everyone happy), (3) there were at least 3 shots, including a flurry of shots, & the flurry sounded different (hence Kellerman wouldnt look silly if the truth ever came out that Hickey fired).
Greer the driver mentioned in effect an almost simultaneous burst, & concussion (the AR15 muzzle was 28ft from his earhole, & aiming say 20" right of his earhole)(& a 3-shot burst would have 3 times the concussion).
Mr. SPECTER. To the best of your ability to recollect and estimate, how much time elapsed from the first noise which you have described as being similar to the backfire of a motor vehicle until you heard the second noise?
Mr. GREER. It seems a matter of seconds, I really couldn't say. Three or four seconds.
Mr. SPECTER. How much time elapsed, to the best of your ability to estimate and recollect, between the time of the second noise and the time of the third noise?
Mr. GREER. The last two seemed to be just
simultaneously, one behind the other, but I don't recollect just how much, how many seconds were between the two. I couldn't really say.
Mr. SPECTER. Describe as best you can the types of sound of the second report, as distinguished from the first noise which you said was similar to a motorcycle backfire?
Mr. GREER. The second one didn't sound any different much than the first one but I kind of got, by turning around, I don't know whether I got a little
concussion of it, maybe when it hit something or not,
I may have gotten a little concussion that made me think there was something different to it. But so far as the noise is concerned, I haven't got any memory of any difference in them at all.
Mary Moorman was the closest spectator, she heard a 3 or 4 shot burst."No, I didn’t. There was, oh, three or four real close together, and it must have been the first one that shot him, because that was the time I took the picture, and it was during that time after I took the picture, and the shots were still being fired, I decided I better get on the ground. . . . I was no more than fifteen foot from the car and in line of fire evidently."