Wyo. Stat. § 1-12-111

When it is necessary to procure testimony of a person confined in the state penitentiary or any jail or reformatory, in the trial of any issue in an indictment or information, or in any hearing before a grand jury, the court may order a subpoena issued, directed to the warden of the state penitentiary or the superintendent of the jail or reformatory commanding him to bring the witness named in the subpoena before the court. The warden, superintendent or sheriff shall take the witness before the court at the time and place named in the subpoena and hold him until he is discharged by the court. When discharged he shall be returned by the officer to the place of imprisonment from which he was taken. The officer may command such assistance as he deems proper for the safe transportation of the witness. When the witness is in attendance of any court he may be placed for safekeeping in the jail of the county. The county in which the offense was alleged to have been committed shall pay the actual and necessary expenses of producing, keeping and returning the witness.