Mo. Rev. Stat. § 106.030
106.030 Power of impeachment — trial.
106.030. Power of impeachment — trial. — The house of representatives shall have the sole power of impeachment. All impeachments shall be tried before the supreme court, except that the governor or a member of the supreme court shall be tried by a special commission as provided for in sections 106.020 to 106.210 .
(L. 1945 p. 1319 § 12837)