FWIW, about when & why Travis shot AA. Spoiler: Travis didn't claim he shot first because AA was trying to grab the gun from him.
Here's what Travis himself told LE hours after he killed AA (recap from GBI Special Agent Deal's testimony in June 2020):
1. That "based on his Coast Guard experience," when AA was 30-40 yards away (on Holmes) "he knew AA wasn't going to surrender, that he was going to keep coming." (On why he armed himself & stood outside the truck, finger on trigger, as AA approached).
2. As AA approached, Travis yelled at him to stop, to get down on the ground.
3. Travis told LE he fired the first shot at AA "because he could tell AA was going to assault him."
4. (But/also). What Travis said about what happened in front of the truck was inconsistent, especially about whether or not AA hit him before he first shot.
5. Greg told LE that AA did hit Travis first, but he also said there were only 2 shots, which was wrong. Deal testified he believed Greg was describing what happened at the time of the second shot, not the first.
6. Travis told LE he backed away after firing the first shot because he was afraid of AA grabbing the gun. He said he fired the 2nd & 3rd shot intentionally, not accidentally during a struggle for the gun, and that he'd done so because AA "kept fighting him."