Take them to court, metro council. The federal rules of evidence do not preclude anyone but the federal court employees, investigators and prosecutors from disclosing over grand jury investigation materials. Metro government isn't bound by 6e unless they obtained it from the FBI. https://www.courier-journal.com/story/news/local/2020/07/12/breonna-taylor-case-fischer-says-he-cant-give-documents-council/5424242002/