Mo. Rev. Stat. § 40.237
40.237 Principal in actions defined.
40.237. Principal in actions defined. — Any person subject to sections 40.005 to 40.490 is a "principal" who:
(1) Commits an offense punishable by sections 40.005 to 40.490 , or aids, abets, counsels, commands, or procures its commission; or
(2) Causes an act to be done which if directly performed by the person would be punishable by sections 40.005 to 40.490 .
(L. 1984 H.B. 1035 § 78)