Okla. Stat. tit. 57, § 57-59: Grand juries shall examine prisons

The grand jury at each term of the district court, shall make

personal inspection of the condition of the county prison, as to the

sufficiency of the same for the safekeeping of prisoners, their

convenient accommodation and health, and shall inquire into the

manner in which the same has been kept since the last term, and the

court shall give this duty in special charge to such grand jury, and

lay before them all rules and regulations in force relating to

county jails and prison discipline; and it shall be imperative upon

the board of county commissioners to issue the necessary orders, or

cause to be made the necessary repairs, in accordance with the

complaint or recommendation of the grand jury.