Law enforcement steals personal property all the time, with no recourse for the owner. All they need is an excuse to link it with an investigation. Even if nobody is ever accused of a crime, and nothing goes before a judge. Then later they sell it at auction and put the proceeds in their own pocket.

Worried about your files? Try worrying about your car or house, they're equally at risk. Not all cops are evil, but they'll all stand behind each other regardless.