Mo. Rev. Stat. § 493.140

Any officer, attorney or person who shall collect, retain or enjoy, and any person who shall give to any such officer, attorney or person, any rebate or pecuniary benefit, as designated in section 493.130 herein, shall be guilty of a misdemeanor, and upon conviction shall be punished by imprisonment in the county jail for a term not exceeding one year, or by fine not exceeding one thousand dollars, or by both such fine and imprisonment.