Anchorage cops are asses, all of em I've met anyway.
Especially the out of state recruits. When I get a full rear view I slow down ten under and they either hit or pass. Look for the X's, Y's in the plates and little antennas.
He was baiting you for a reaction plain and simple. Again cops are asses;the hole part.
They use laser guns. So yeah they pretty much get you from the speed traps. He was simply pacing you. He never saw 100 in his suv be the time you were slowed down again.
The warning was the right call. As he seemed to have caused all your problems in the frst place.