At this point, I don't think we will ever learn the truth. It's obvious that there were screw-ups all along the way, and I have no doubt that all parties will be in full ass-cover mode while portraying the responding officers (whether or not they did anything) as "heroes" to deflect any and all criticism.
I'm beyond disgusted. Schools never learn. After this, I expect that when schools open in September they'll all be in full alert mode, doors will by e duly locked, classroom doors will be closed and locked -- for maybe a semester. Maybe even an entire school year. Then there won't be any school shootings, so gradually they'll ease up. Classroom doors won't be closed. Some exterior doors won't be closed. The retired police officer I was discussing this with yesterday confirmed this. He was a sergeant before he retired. He told me that he used to check schools in his town, and the back door to the kitchen was
always open. He said he would complain, and he was told that was so they could receive deliveries. Of course, there was a doorbell right there -- but the cafeteria workers were too lazy to go open the door, so they just left it open.
His department requested that the schools in town assign a custodian to go around every two hours to verify that all exterior doors were locked. The school administration refused. They didn't want to take a custodian away from whatever he was supposed to be doing -- which the retired officer said was usually playing Solitaire on the computers in the maintenance shop.
I used to know a locksmith who serviced local schools. He told me he never wasted time checking in through main entrances. He just drove around to the back and walked in through the door to the maintenance shop -- he said they were always open.
Administrators pay lip service to security, but they don't really want to do anything about it. They just want to be able to
say they're doing something about it.