@Mas coming strong with the facts.

I tend to agree with @Erick Gelhaus on the Sergeants handling of the AZ incident. Having been in that position on multiple occasions, you begin to realize that one of the most important roles of a supervisor in that type of environment is to maintain and project calm control. If the senior officer present isn't maintaining a calm demeanor, you can't expect the young guys to do so. There has been a great deal and discussion and study the last few years of the effect of 'Dispatch Priming' on officer actions at the scene of a critical incident. I think this was a perfect example of 'Supervisor Priming'.