Look, you chose to be a public servant, driving a publicly-owned car. That kind of negates your right to privacy there. Getting the cops to cover for you is, a. really bad PR for the cops, and b. if not illegal, it should be.
I have no doubt that newspapers mangle the news regularly, and I can understand wanting to avoid that, but shoving evidence under the carpet is no way to get out of trouble. It’s just going to make things worse. Release the evidence, get your experts to explain what happened and go about your life.
Note to self: Make sure next car doesn’t have black box.