There are four deputies who took up defensive positions outside the school and listened to the sound of seventeen murders. Those men thought they were following orders, not one of them went in like the unarmed football coach.And thats not counting the deputy who monitored the video (which, as it happened, was delayed by 20 minutes - but he thought he was watching real time).
That adds up to a sheriffs department which was not there to protect and serve; obviously, deputies were not protecting anyone.
Well....besides themselves.