So many points.
Telmar v Ivan, both right, both wrong. Personally I like to see polite disagreement, and I love their hopefulness they hold of converting their 'foes' - for me please continue.
Old Joke in the RAF related to how many rounds "he moved so I shot him again".
The guy was an idiot, the cops didnt do great, 7 rounds at zero range and as far as we know hitting the man, feels like a lot to me.(Yes I've been issued and trained with weapons, more long than short) and suggests a little panic/loss of control, No I haven't been there, but did think about it once, in Saudi Arabia.
Yes the 17 year old civilian with the rifle showed better control than the cop. I dont understand US weapon laws, but allowing 17 year olds to own assault rifles sounds pretty lax again to me, even given you might allow 21 year olds to do so. Judgement on the 17 year old being on the streets, armed, no idea. How you deliver justice as he's now been arrested, is going to be crazy, with all the video's of before, after, what each person did, before, criminal records etc.
The geneva convention sought to set some limits on behaviors. Setting that aside, the pistol guy did appear to 'cede' then turns his gun on him, so thats a fair shot from the 17YO rifle guy.
Mess mess mess - Good luck America.