@pieceofapuzzle I have to apologize! I didn’t read your details. Sometimes I don’t and then my answers are just stupid. :-)
Whenever there is a trooper anywhere near me on the highway, a freeway or turnpike, I slow down to 55 if I’m not sure what the speed limit is. That’s generally safe unless the speed limit has been reduced in a work zone. Also, there are not that many places where the speed limit is 70 mph, maybe 65, but 70mph zones are relatively few and far between, more in the western states and on parts of the Ohio Turnpike the speed limit is 70, I think, e.g., so setting your cruise at 70 was probably not a good choice, nor was keeping up with the trooper probably a good choice. I live in the mid-atlantic, near the coast, so there aren’t too many of them around me. Maybe there are more where you live. If they are going 70mph and you are going 55mph they will be far ahead of you in a very short time and is generally better, in my opinion, to have the police ahead of you rather than next to you or behind you. What was the speed limit there anyway?
The bottom line is that, I believe that in many places it is illegal for police and other emergency vehicles to speed without their lights flashing, when not responding to a call, but who’s going to pull them over and ticket them? It may not be fair or right but it’s kind of the way it is. Had the officer been involved in an accident while speeding, without her lights flashing, not responding to a call, she might have had liability in the accident because it would have possibly been illegal for her to speed but the cops aren’t going to pull over other cops for speeding and without someone enforcing the law, they can drive as fast as they want.