For A... who the heck keeps boxes? Especially kids.One teen was returning the rifle but the other two had air pistols in their waist band. They were going to "exchange" the pistols. Maybe, maybe not. I find it hard to believe the guard would shoot if they told him they were returning the rifle.
A couple of lessons to learn.
A) if you're returning a rifle you should probably use the box it came in.
B) it doesn't pay to be the hero. This guy was not a security guard for that store, just waiting in a parking lot.