A situation that I see far too often in law enforcement related shootings is the “pile-on effect”. Say you are responding to a shots fired call and on approach you are fortunate enough to see the bad guy down the street. You then bail out of your car an engage from a distance.
I say fortunate because there have been a number of cases where the LEO wasn’t sure of where the bad guy was and pulled right up to him…which is a bad thing.
Now being alone in a gunfight is even a worse thing, so the next officer in arrives to cover you.
Pretty soon everybody starts responding to help. While “the more the merrier”, what tends to happen is that everybody starts converging on the same spot. Either out of “driving tunnel vision”, where the officer is experiencing the stress of emergency response, or because he is trying to determine the location as he is approaching and feels the need to arrive as fast as he can to help his comrades, what happens is that the follow on officers keep right on driving into the “kill zone”.
If you can manage to stay calm and keep you wits about you, a better approach is to take advantage of your opponents OODA cycle by arriving from an unknown location. Use your familiarity with your patrol area by arriving on an adjacent street. Even if it means having to jump some fences and run through some yards, the advantage you gain could be what makes the difference in the outcome. If you are fortunate enough to be armed with a patrol rifle, you will have the advantage of range coupled with your flanking approach.
Even if the opponent is inside of a structure or you are unable to get a line of sight on him, this method of approach starts to form a perimeter on the danger zone which is a vital component of starting to take control of a critical situation.