This is why I use a dash cam. :)
There are a lot of youtube videos now of cops acting badly. In one case that comes to mind, an oncoming cop swerved into a guys lane, causing the guy to veer to the right to keep from hitting him. The cop then turned around and pulled the guy over for crossing the centerline and almost hitting the cop. The guy showed the cop his dashcam, and explained what happened and that he had it all recorded.
The dashcam isn’t foolproof insurance, but it’s pretty solid. They have to cross a whole different line to confiscate that. The sooner you know it’s all been recorded, the more likely they are to pursue a different victim.
The problem here in Louisiana is that there are towns, such as Washington, Louisiana (I strongly encourage all to avoid this place and be very careful on the interstate as soon as you see a Washington exit sign. The local cops troll the interstate for ‘traffic violations’.) where the attitude in the courts is ‘we don't care about no stinking video cam. You are guilty pay up. A well off attorney deliberately did what others wouldn't over a matter of $600. He fought the town and in the end the appellate judiciary pretty much upheld the lower court. The ‘guilty because we say so’ mentality based on this being a Roman Law state instead of a Common Law state is deeply ingrained. I think NM is also partially Roman Law due to its long history as part of the Spanish Empire.