Police Officers will react exactly as they have been trained.
Some decades ago, a police agency in the south came up with "better" firearms training. They installed moving targets. The Officer would wait until the target began moving right to left, or vice-versa, and only then were they allowed to fire. Months of this "improved" training.
An Officer responded to a armed robbery call and, per training, parked not near the door, but some distance away. As the bad guy ran out the door of the business, the Officer fired at the moving target. As the store manager ran out the door chasing the bad guy, the Officer fired at the moving target.
I'm just saying that the training must be carefully thought through because that's how officers will respond. In fast situations Police don't evaluate and respond, they react.