In the videos I’m thinking of they are definitely not securing the scene or looking for other bad actors - they are walking around, talking to other officers, clustered around the squad cars or walking back and forth past the person bleeding out on the ground. In one I remember they had handcuffed him and then were standing 6 feet away in a group, periodically one would walk across the street, or go over and look at the guy then go back to the group. I actually don’t remember what was said about why the guy was shot, if he was fleeing or attacking or what, but the milling about after and not doing anything to assist blazed a pretty clear mark on my brain.
I get it about the torn as to help or don’t-help if you’ve been attacked and shot your attacker in self defense. I think as long as the adrenaline is burning, I’d probably be pretty clear about what needed to be done, or not done… if the LEO response takes a while, and in the country where we are it could, and the adrenaline wears off, I don’t know how I’d feel.