I was watching a livestream of it when it happened. And then of course looking at numerous other videos later. There were two guys walking in the street behind where Kyle and the red shirt guy got into it.
Then Kyle runs away with red shirt guy chasing after him. The two guys in the street chase after them both, but cutting up through the car lot at a sharper angle. One (maybe both) draw pistols.
After the shooting it might be those same two guys that are helping get red shirt guy to the hospital across the street. Hard to say though - just basing it on quick images of white shorts, dark hoody, etc.
It wouldn’t surprise me if one of them was trying to shoot Kyle but hit red shirt guy in the back by accident. I believe the autopsy said that the kill shot in the back. I don’t think they’ve ever released the forensics on the bullets, etc.
If red shirt guy was shot in the back with the AR at close range (a few feet) I’m pretty sure it would have gone through him and the exit wound visible in his bare stomach and chest.
The reporter and others treating him finally saw the head wound (red shirt guy laying on his back) and treated that. That was a grazing wound.
Pretty sure the bullet hit the pelvis. 5.56(if that’s what it was) is notorious for fragmentation, with small pieces traveling in strange directions once the bullet’s structure is compromised.