Mo. Rev. Stat. § 21.220
All costs and expenses of proceedings, including the necessary expenses of any officer in executing any writ or process of either house or of a joint meeting, and all witness fees, shall be paid:
(RSMo 1939 § 12871, A.L. 1957 p. 595)
Prior revisions: 1929 § 11246; 1919 § 7129; 1909 § 8125