I saw the video and I am not impressed with the way Brailsford reacted. Way too trigger happy. This absolutely did not have to happen. A more experienced officer would never have fired those shots. And I say that as someone who is retired military and retired LE.
Brailsford was an aspiring actor who never spent a minute in the military.
There are soldiers serving time in Leavenworth for doing exactly to armed Al Qaeda combatants what Brailsford did to an unarmed American citizen.