Okla. Stat. tit. 51 § 100
The Attorney General of the state shall have the power, and he is hereby authorized and directed whenever complaint has been made and the names of witnesses furnished him, or whenever he deems necessary to issue subpoenas for such witnesses so furnished him, and for such other persons as he shall have reason to believe to have any knowledge of the truth of the complaint made, to cause said witnesses to appear before the Attorney General, or any magistrate or notary public, at the time and place in the county of the accused officer's residence, to be designated in the subpoena then and there to testify concerning the subject matter of such investigation.
Each witness shall be sworn to make true answers to all questions propounded to him touching the matter under investigation, and the testimony of each witness shall be reduced to writing and be signed by the witnesses.
The Attorney General is hereby authorized and empowered to administer the necessary oaths and affirmations to such witnesses.
All witnesses subpoenaed or used by the Attorney General in such special investigation, or upon the hearing of the complaint or petition in the district court, or the Supreme Court, shall be entitled to receive the same per diem and mileage as is allowed witnesses in the district court of the state, said fees to be paid by the Attorney General out of any funds of his office available for such purpose.
Any disobedience to such subpoena, or refusal to answer any proper question propounded by the Attorney General at such inquiry shall be a misdemeanor, and shall be punished by a fine of not more than Five Hundred Dollars ($500.00), or by imprisonment in the county jail not more than six (6) months, or by both such fine and imprisonment.
Okla. Stat. tit. 51, § 100