I posted earlier if he fired his pistol a few times the overwatch would have at least heard it. The officer dropped down from the roof when Crooks turned to him. If he had fired a few rounds from his pistol I think it would be reasonable to assume the overwatch and anyone else nearby would be alerted. Whether the overwatch would have taken action is another story.
I’m embarrassed at this, but also feel a certain shame at what I would have or could have done. It’s easy to slip.
Seems they were aware he was there and was watching him. But had stand down orders. Thats the messed up part. He got off 8 shots before he was taken down.
THe sound of gunfire and the principle would be rush off the stage post haste.