As horrible and tragic as this is; This is an interesting perspective / breakdown of the impact as a ricochet off of his body armor. Medically sound analysis as well.
As soon as I saw the unedited footage I felt it a non-survivable - not only from the neck wound but his immediate posturing post impact indicating a brainstem hit / injury.
Body Armor Analysis
May his family find peace... 
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Primum non Nocere
"I have hung out in dangerous places a lot over the years, from combat zones to biker bars, and it is the weak, the unaware, or those looking for it, that usually find trouble.
Ain't no one getting out of this world alive. All you can do is try to have some choice in the way you go. Prepare yourself (and your affairs), and when your number is up, die on your feet fighting rather than on your knees. And make the SOBs pay dearly."
The Reaper-3 Sep 04
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