Comment by opwieurposiu

At the target range I have noticed that police often drill with this anti pattern:

1. un-holster, aim 2. yell "Stop or I'll shoot" or similar line 3. fire a few rounds

They train like this over and over, they never do a step 3 where they re-holster or stay aimed but do not fire.

Thus they train themselves to automatically fire regardless of the actions of the person they are aiming at.