Okla. Stat. tit. 63 § 939
Except as otherwise provided by law, the Chief Medical Examiner shall produce records, documents, evidence or other material of any nature only upon the order of a court of competent jurisdiction. An interested party or litigant in a civil or criminal action may make application for an order to produce such materials. The court, after notice to all parties, including the Chief Medical Examiner, and a hearing on the application, may, upon the showing of good cause, direct the release of a copy or any part of such material.
In addition, the court may also direct the payment of reasonable costs by the requesting party for the production of the material. The production of such material shall take place at the Office of the Chief Medical Examiner unless, upon a showing of good cause, specifically ordered otherwise by the court.
Okla. Stat. tit. 63, § 939