Can ya imagine the grief this cop will take in the squad room for years??
I don't know how much because the other officers will question how likely it is they that they could have done the same. The injury makes it more real.
Now, an officer with a negligent discharge that didn't hit anyone might be told to carry a blue training gun around the precinct instead of a real one. That or wear mittens while in the building.
I'd lend a flak jacket to the counter server at the doughnut shop just to see the officer's reaction.