My old roomate is a cop here in VA. He used to be cool and now he let the job get to his head. I can't even talk to him anymore.
This is disturbing but the "brotherhood" of police officers is annoyingly apparent. The cover for each other no matter what they do and it makes for a tough nut to crack.
Just as everyone has said. Make sure that all your actions are documented, contact a lawyer and notify the press. If the press gets a hold of this they will have a field day with it.
Never speed through there again and repaint your truck. Carry a camera and drive with your lights on in broad daylight. They've obviously got their eyes out for you