Tough shit. They are there to take the bullet for innocent civilians. I highly doubt that Deputy would have been hung out to dry if he made the smallest effort to move in on the shooter. He would be a hero (maybe a dead one) if he just tried to move closer to the shooter. He could have even popped off a couple rounds in the air behind a safe barrier which most likely would have diverted the shooters attention to himself and given more time for backup. What higher calling than to die for our children?
If the reports are true, he will go down as a coward or incompetent. We'll see.
He was assigned to this school for years. Should have been very well trained to take out a shooter. Problem is, many of these cops assigned to schools think of it as a soft pre-retirement job, not a position that you need to be ever vigilant.