[DakotaGator]

Normally there is an Incident Commander immediately in charge of the scene utilizing a chain-of-command. That Commander and his staff have complete authority over the scene.

I suspect this is what the Firefighter was referring to. And if the CHP Trooper was neither the Incident Commander nor part of the incident's command structure, he had absolutely no authority to order moving the fire truck.

If the CHP Trooper did not have that authority, then his order was illegal. If his order was illegal, then his detention of the Firefighter was false arrest.

I'm sure there is a great deal of CYA scrambling going on right now with unofficial inter-agency negotiations on how to whitewash this cock-up.

[TChad]

That makes perfect sense.

[nvscanman]

You are most certainly correct in describing the format that should be
followed. Problem is that the badgemonkey belongs to a fraternity that
routinely refuses to police itself. Nothing will happen to the thug. He will
be sent back out to the highways to harass and abuse citizens, the fire
fighter might perhaps get some taxpayer cash to help cover up the incident.
It will be business as usual.