cop carrying the gun around afterward = no no.
There are 10+ cops on the scene. the bad guy is cuffed or bleeding or whatever as they put on gloves to assist him.
The shooter no longer needs his hot hand and jacked up mind being the shooter in any situation. Put the gun down, sit down, and let the other 9 cops handle the bleeding dude.
I am fine with cops shooting bad guys who make threats - but that walk around with your piece like it's your cawk for minutes? My brother shot a bad guy, and as soon as they fled, he emptied his weapon, put on counter and waited for police. He didn't stand there like a badass waiting for the next paper target to emerge.