Okla. Stat. tit. 63 § 951
The Chief Medical Examiner shall maintain a contract transport service authorized to transport bodies of deceased persons of whose death he or she is officially informed to an appropriate place for autopsy or for the performance of scientific tests; provided that, after the autopsy shall have been performed or such tests made, the bodies of such deceased persons shall be returned to the county from which they were brought, or, when so authorized by the district attorney of the county and upon request of the nearest relative of the deceased or other person who may be responsible for burial, the body may be transported to some place other than the county. The Chief Medical Examiner or his or her designee may authorize payment for the services in transporting the body to the place designated for autopsy, which shall be submitted upon a claim filed with the Board of Medicolegal Investigations.
Okla. Stat. tit. 63, § 951