@ossobuco,
Adds, I think this is true (maybe I'm naive) of the whole neighborhood watch program system, nationwide, that you don't take matters into your own hands.
I think this teen was considered by the shooter as being guilty of being black and walking; the shooter may have other issues. Maybe there's a gated community mindset/function that I don't know about personally.
I relate to this situation in that my niece has lived part of her life as one of the relatively few black children, then teen, now adult, in an ok but sort of iffy area quite like where my ex and I lived. Most people there know her and I don't think she'd be a target, but a guy like this gives me chills.
The repulsive thing, past the shooting itself, is that he wasn't held.
Back to my niece; her u.s. grandmother and grandfather lived in a mobile home village that didn't allow children or pets. Quietest, strangest place I've ever been in. I am sans doubt that people there peered out their curtains at her.
Soz, you will remember the photos.