Mo. Rev. Stat. § 1.210
1.210 No imprisonment without authority of law.
1.210. No imprisonment without authority of law. — No person's body shall be imprisoned or restrained unless by authority of law.
(RSMo 1939 § 648, A.L. 1957 p. 587) Prior revisions: 1929 § 648; 1919 § 7051; 1909 § 8050