I saw different ones running back at least three times. And this was after gunfire. I think even one of the times there were were more heavily armed police dressed in Combat gear. It was a disgusting display of cowardice.
“It was a disgusting display of cowardice.”
That is possible but we need to know a lot more before being certain of that conclusion.
The police that were standing around (like hand sanitizer guy) seemed so relaxed, comfortable, even bored.
If you search on the Internet about school active shooter drills you will find that most people were (and are) unable to tell them from the real thing.
Uvalde cops had been through a drill just two months earlier:
https://www.independent.co.uk/news/world/americas/texas-uvalde-school-police-training-b2089223.html