People doing as you say and walking around with guns. People having words. Somebody loses their temper and shoots. Somebody dies.
From the account that is not what occurred
Somewhat pre-meditated.
I provided an account. "premeditated" after words had been exchange? Might have still been heat of the moment. But (a) I hope they catch the guy who fired the round and (b) I hope we hear additional accounts.
It is thus far unclear to me if the shooter was even part of the same group. And... premeditated to shoot who he shot?! Seems pretty unlikely. If the shooter was aiming for her, that's pretty good shooting. Even when I was on the pistol team in college I would not have been able to hit a person I was aiming at at the distance they've suggested.