No new shooter should be handed a pistol grip shotgun. It looks like this is some kind of police/military drill, but my guess is this shooter has never used that weapon before.
It is also really hard to tell where the end of that shotgun is compared to the guy with the shield.
Combine what looks to be a novice shooter with bad positioning for the shield guy and this could have turned out really badly.
Shoot safely. Be safe. Think before you act. Safety first.