What to do when a manager violates employee files?

There is insufficient info given with which to answer the question. VIolate the files HOW? Violate the files in WHAT manner? More specific info is needed.

If you feel that your civil rights are being violated file a complaint with the EEOC.

If the provisions of your union, or employment, contract are being violated, file a grievance.

If a particular labor law is being violated file a complaint with your state Labor Board.