Mo. Rev. Stat. § 476.180
Current with changes from the 2023 Legislative Session
No judge of any court of record, who is interested in any suit or related to either party, or who shall have been of counsel in any suit or proceeding pending before him, shall, without the express consent of the parties thereto, sit on the trial or determination thereof.
§ 476.180, RSMo
RSMo 1939 § 2012