LOE’s are trained to stop the threat. They are also trained to shoot center mass, generally causing death. Clear as mud, huh. ;>)
Real life doesn't much resemble TV and movies. There are no replays and nothing happens in slow motion. I think that too many are unaware of how quickly a situation can develop, and how fast and violently an assault can happen. In seconds a person can be dead or dying, and the wrong decision can be fatal.