NOT surprised at all.
But the school will be praised because they were so proactive.
Sorry if I caused confusion... I didn't mean to link those two parts of my post. The first (being a false report) was my own thought, then I stated that I was listening to the scanner. I didn't overhear that over the scanner. My bad for poor phrasing.
A female called in that a white man in a long coat may have had a long gun with him. May have fled in a green or gray sedan in an unknown direction.