Mo. Rev. Stat. § 532.590: Custody of prisoner granted officer holding attachment for derelict officer.

The court by whom such attachment shall be awarded may also issue a precept to the same sheriff, or other person to whom such attachment shall be directed, commanding him to bring forthwith before such court the party for whose benefit such writ of habeas corpus shall have been allowed, who shall thereafter remain in the custody of the sheriff or person executing such precept, until he shall be discharged, bailed or remanded, as such court shall direct.