Last time I chased down a cop to argue that he was in the wrong, I was taken to the ground, cuffed, and threatened with jail time. What could possibly be gained from that...PRs for the department make a bogus statement on behalf of the cop? This guy was asking for trouble. When you take your bicycle out on a roadway, if you don't accept the fact that you're going to be treated unfairly at times, you will eventually wind up at your destination as, what the marines would affectionately say as, "butthurt" for no reason. The most you can do is make sure you are in the right, and certainly not invite scrutiny from a jerk off cop.