Seeking OT Advice Regarding A Police Matter

The other day, I was driving to work at approximately 6:30am. Sunrise was officially at 6:23am and there was a slight haze from the high humidity. The road I was on has 3 lanes in either direction with a median (aka neutral ground). Traffic volume was light but steady and the speed limit was 45 mph.

I noticed a dark SUV approaching from behind at a high rate of speed. The SUV did not have running lights or headlamps on and did not use a turn signal as it bounced frequently from lane to lane. It passed me doing between 60 and 70mph, continued down the road for approximately 1/4 mile and then whipped a u-turn (again without signaling).

I realized that it was almost certainly an unmarked police vehicle. As the SUV passed me in the opposite direction, I honked my horn and gave a “thumbs down” to the driver. I was not surprised to see the vehicle brake, do another u-turn without a signal and speed up to get on my tail and turn on the emergency lights that were hidden in the grill.

I pulled over and the policeman was at my window almost immediately. He asked if there was an emergency. I said that I was going to ask him the same thing because he was “driving like a maniac” and endangering the safety of the other people on the road. I told him that he was a loose cannon and wasn’t above the law or the PD’s policies for using emergency lights. I guess that he checked me for warrants, etc and then told me that he was going to let me off with a warning for “excessive use of the horn.”

He said that he was trying to catch up to a speeder who must have ducked into a neighborhood. I assume that he was taking his frustration at losing the speeder out on me. I told him that I was going to file a complaint with his department and he quickly lost interest in talking to me and he drove off.

I decided later that day to just drop it and not file a complaint. However, the next morning, I saw the same officer with a car pulled over. I’m sure that the driver was being ticketed for something less egregious than what I saw the ticketing officer doing the day before. That has me rethinking my decision to not file a formal complaint.

What would the OT do? File a formal complaint? Talk to his sergeant but not file a formal complaint? Let it go?

TL;DR: A policeman did not appreciate being called out for reckless driving and acted like a bully. What would the OT do?