Okla. Stat. tit. 10A, § 10A-1-4-501: District attorney to act as petitioner

Except as otherwise provided by this Code, the district attorney

shall prepare and prosecute every hearing and proceeding within the

purview of the Oklahoma Children's Code, and shall act as petitioner

in all cases; provided, counsel for the Department of Human Services

may, with consent of the district attorney, represent the interests

of the state in proceedings involving a child in the permanent legal

custody of the Department.