My 1st question: who here is traffic accident reconstruction trained?
The only way to determine if charges should be filed is after a thorough review of the collision report, there are too many contributing factors we don't know... and the media wont report. Was the vehicle in good working order?, posted speed?, P/F speed?, was there any unusual condition on the roadway?, time of day, weather, other vehicles / pedestrian actions, was the stop sign limit line clearly marked, was the stop sign clearly visible, what traffic control applied to the other driver, was the roadway asphalt, concrete, did it crown, if so, where and how much, corrective lenses?...on and on.
Just because he wasn't responding to a call, doesn't mean he didn't observe something, lots of activity is self generated (or pro active)
When it comes to "Emergency vehicles" & collisions, sometimes the courts allow departments to handle it "administratively", they recognzce that emergency vehicle collisions are part of doing business. While he may not get charged by a court, if he violated dept policy he could buy mass days, lose rank (pay), get fired, or otherwise be punished. On top of that he faces civil liability.
People used to always complain we took too long to get there, and of course that we're always driving too fast..
In Cal the police are technically not allowed to speed unless rolling "code 3", very few calls are assigned code 3, maybe 2%... yet *some* officers will haul-ass anyway to get there, risking all kinds of trouble. Many dept policies restrict code 3 speed to 10 mph over the prima facia speed, and thats it.
Other officers dont give a rats sphincter, if you call in your GFs being raped and its not a code 3 call, these guys will drive 25MPH if its posted, coming to complete stops, obeying every traffic law.. taking their sweet time to get there following "the rules" The only reason they'll speed if to assist a fellow officer, citizens are not worth the risk.
So pick your poison, you want the cops to get there fast, or obey every mundane traffic rule when your safety is in question.