An analysis of SA Youngblood's Original Report can help pin down what is occurring in the VP car the moment Altgens 6 is taken:
I heard an explosion--I was not sure whether it was a firecracker, bomb, bullet, or other explosion. I looked at whatever I could quickly survey, and could not see anything which would indicate the origin of this noise. I noticed that the movements in the Presidential car were very abnormal and, at practically the same time, the movements in the Presidential follow-up car were abnormal. I turned in my seat and with my left arm grasped and shoved the Vice President, at his right shoulder, down and toward Mrs. Johnson and Senator Yarborough. At the same time, I shouted
"get down!" I believe I said this more than once and directed it to the Vice President and the other occupants of the rear seat. They all responded very rapidly.
I quickly looked all around again and could see nothing to shoot at, so I stepped over into the back seat and sat on top of the Vice President. I sat in a crouched position and issued orders to the driver. During this time, I heard two more explosion noises and observed SA Hickey in the Presidential follow-up car poised on the car with the AR-15 rifle looking toward the buildings. The second and third explosions made the same type of sound that the first one did as far as I could tell, but by this time I was of the belief that they definitely were shots--not bombs or firecrackers. I am not sure that I was on top of the Vice President before the second shot--he says I was. All of the above related events, from the beginning at the sound of the first shot to the sound of the third shot, happened within a few seconds.
"I heard an explosion--I was not sure whether it was a firecracker, bomb, bullet, or other explosion."
This can't be stressed enough. The sound of the shots is really loud. That 160+ witnesses describe hearing three clearly audible shots leaves me with little doubt that's how many were fired. It can be stated with confidence Youngblood is describing the first of these three shots.
" I looked at whatever I could quickly survey, and could not see anything which would indicate the origin of this noise. I noticed that the movements in the Presidential car were very abnormal and, at practically the same time, the movements in the Presidential follow-up car were abnormal."The first thing Youngblood notices is 'abnormal movements' in the Presidential limo and the follow-up car. In Altgens 6 we see three agents have spun round and are looking towards the TSBD. In the limo JFK's hands have flown up to his throat with his elbows extended upwards. Youngblood sees these movements and realises something serious is happening.
" I turned in my seat and with my left arm grasped and shoved the Vice President, at his right shoulder, down and toward Mrs. Johnson and Senator Yarborough. At the same time, I shouted "get down!" I believe I said this more than once and directed it to the Vice President and the other occupants of the rear seat. They all responded very rapidly."He shoves LBJ down towards Ladybird (confirmed by LBJ) and as he does he shouts at everyone to "Get down". I would imagine it is at this point that Ladybird stops smiling as she and Yarborugh duck down immediately.
"I quickly looked all around again and could see nothing to shoot at, so I stepped over into the back seat and sat on top of the Vice President. I sat in a crouched position and issued orders to the driver. During this time, I heard two more explosion noises..."It is at this point Youngblood dives into the back seat after which he hears two more shots.
"All of the above related events, from the beginning at the sound of the first shot to the sound of the third shot, happened within a few seconds."This is an important point - the three shots occurred within a few seconds. Something confirmed by other witnesses:
"
I distinctly remember three shots. There was an interval of approximately 5 to 6 seconds from the first to the last shot," C. Carter
The sequence of events is as follows.
First shot
Sees 'abnormal movements' in Pres. limo and Pres. follow-up car.
Turns in his seat, reaches over with left hand, pushes LBJ down towards Ladybird.
At the same time he shouts "Get down"
Ladybird and Yarborough duck down immediately.
He jumps on top of LBJ.
Two more shots ring out.
The whole sequence happens in a matter of seconds.
This may have implications for when the second shot occurred.
We know Altgens 6 is taken at z255 and the headshot happens at z313.
If the headshot is the second shot it means Youngblood has just over three seconds to shove LBJ down as he shouts at everyone, then jump in the back to cover LBJ. It's tight but definitely possible.
If there is a shot
before the headshot it makes it almost impossible to get all this done.
Altgens 6 strongly supports the headshot as the second shot.
Finally, is it possible to pin down the exact moment Altgens takes his picture in relation to the sequence of events in the car? There is no point in his original report he states he looked to his right for any reason, there is just the vague description of looking to where he thought the explosive noise might be coming from. However, when we turn to his WC testimony he is slightly more specific as to where the sound of the shot came from:
"Mr. SPECTER. Now, did you have any reaction or impression as to the source or point of origin of the first shot?
Mr. YOUNGBLOOD. I didn't know where the source or the point of origin was, of course, but the sounds all came to my right and rear."
It would appear that Altgens 6 was taken at the moment Youngblood was trying ascertain where the shots were coming from. Again, this indicates that the picture was taken very soon after the first shot. Indeed Altgens himself makes that point in his WC testimony:
"I made one picture at the time I heard a noise that sounded like a firecracker--I did not know it was a shot, but evidently my picture, as I recall, and it was almost simultaneously with the shot--the shot was just a fraction ahead of my picture,""...it was almost
simultaneously with the shot...the shot was just a fraction ahead of my picture." The analysis of Altgens 6 presented here is certainly in accordance with Altgens' own observation.
In the model I'm presenting here the first shot occurs at z223, just 1.7 seconds before the Altgens pic is taken.