I really do not think that is the case. It would be a waste to have a dash cam not on all of the time since they are for the unexpected. It is possible that for some that the roof lights need to be on, but look at the video and there are no reflections on the truck or anything else that indicate roof lights being on, even when the cruiser bounces directly off the side of the truck when the reflection would be very obvious. The roof lights on the cars around here reflect off the side of the trucks up to a half mile away when they are lit up.
I live in 2 different parts of the country and I know for a fact that NJ police car's roof lights and the forward-looking cameras are both on simultaneously. How do I know that? My son is a Police Officer in a township in NJ for the past 13 years.
In Naples, Florida, my primary residence, which is in Collier County and is patrolled by Collier County Sheriff and Deputies, identical systems are utilized.
If the Trooper was using his lights to get around traffic as mentioned above by another board member, I can't attest to that, and neither could he, but what are the chances that he or she was responding to an actual emergency and rushing to the scene of an accident or to back-up a fellow officer? Imagine if it was one of us? Wouldn't we want help to arrive a quickly as possible?
BTW, sirens can only be utilized by a command from the Trooper, Police Officer or Sheriffs Deputy's superior.
I'm not familiar with Trooper's cars systems in Connecticut, where this accident took place, but, I know that all of these cars are ordered from the factory with these unique systems installed.
Now, we can go back and forth with these opinions and perhaps there are some among us that just like to add fuel to the fire.
I'm not pointing any finger towards anybody, but, I've written the last words that I had to say about this!