He was firing from the hip, military training generally frowns on that. Military training is possible but civilian paintballer, videogamer, etc., is also possible.
True.
KDFW saying suspect shot himself. Suicide.
I remember a video from Iraq last year where a group of militia were in a firefight with some ISIS thugs. Most of the militiamen were young and employed the spray and pray method of attack. But there was a gray-beard with them who was taking his time, identifying targets, and taking aimed shots.