Every community needs to have some kind of citizen accountabilty for their police officers and other public servants in cases like this. If the officer done his/her job then there's nothing for them to worry about.
Actually, this is a pretty novel idea that has some merit. Some kind of QUALIFIED (knowing the laws) civilian board, to oversee the actions of the police. Need some "pre-screening" so not everyone that felt they had a "grudge" for getting stopped for speeding, etc. could come before them. But for those FEW isolated cases (like OPs, if that's 100% of the story) could be addressed.
Let me be the 1st to say that I've MOSTLY had very good experience with the cops around here. (I did get one that was a bit overzealous--stopped me becasue the window tint on the car I was driving was "too dark" (it'd been that way for years)--technically he was right (they've changed the laws), but a warning would've been sufficient, instead of a ticket.) But, since he WAS adhering to the letter of the law, well, no harm, no foul.
And, when my youngest son was 19 ( but very immature) he himself got involved in a BAD situation (serious peer pressure from the wrong people), that could've gone very badly for him (Technically he could've been brought up on felony charges, even though he was only peripherally involved.) The local Sheriffs "requested" his presence (rather than coming to the house and taking him away in handcuffs. I delivered him to the local Sheriffs office, and they treated both he and I in a most professional manner. And, once they realized he was mostly a "victim of circumstance", they let him walk out the door with me. ('Course I think they knew I was steamed, and his life was gonna be more miserable with me than with them!)
On the other hand, both my kids(now 22 and 25 have been stopped for routine (almost silly) traffic) violations ( a broken mirror, which happened the night before, and because a passenger tossed a pop can out the window)...In both cases they were removed from the car and "patted down", which to me is a bit extreme, for a routine traffic stop. Had it been me, I'd probably gotten into trouble, as I would've raised Cain.
In short, I've always taught my kids to respect, and treat with respect any LEOs they encounter....but then I see some of the horror stories posted here. What CAN I say to them.