Police Inaction From a Social Psychology Perspective

As a retired police officer of over 35 years, I am familiar with the dangers and conditions that police operate in along with the training they receive.
As information comes in about the Uvalde school shooting and the actions taken by police, it is clear that the response by initial police on the scene was inappropriate and did not meet National standards for response to an active shooter. The recognized response is that you immediately enter and confront the shooter without waiting for backup, command and control, etc. While this puts the individual officer in serious danger, it has the best chance of minimizing deaths and injuries to innocent civilians.
As conflicting information comes out, I am withholding judgement on the officers' actions, in contrast to those on here who are quick to jump to conclusions.
What information is emerging is that it appears to be a leadership failure, that the Chief of Police refused to send officers inside, for whatever reason.

Excellent work, Inaction is not a case of cowardice but rather a human instinct. We are not even aware the process is occurring yet our brains default to preservation. Same reaction of a soldiers on combat situations PTSD

"Only through conscious retraining of the mind and body can helping behaviors, bravery, courage, and running towards danger become habit."

Sounds familiar.

I am waiting to see what the findings will end up being. But to date, I am heart sick over the inaction of too many who should have been trained to act.