Okla. Stat. tit. 19, § 19-215.16: Powers and duties of district attorney

The district attorney shall exercise and perform all the powers,

duties and functions provided by law for the county attorney of each

county, and shall appoint all of his assistants. Wherever in the

Statutes of Oklahoma, in existence at the effective date of this

act, reference is made to the county attorney, the district

attorney, acting personally or by his duly appointed assistant,

shall perform all the powers, functions and duties and be subject to

removal from office and to all the obligations and liabilities and

shall stand in the stead of the county attorney under such statutes.