That is not what I said. Containment is only done if the shooter is barricaded and not active. If the shooter is still actively shooting, then they will engage. No offense, but if you were not there then you should not pass judgement yet. I seriously doubt the units arriving on scene went to cover and did not work towards taking out the active shooter.The protocol of containment has proven to be a failed venture over and over again with active shooters.
I just don't know what a cop could be thinking knowing that people are being killed, yet waiting.