It's right in front of you face....

Here are the Missouri Supreme Court's Rules on when Judge's should recuse themselves:

https://www.courts.mo.gov/courts/ClerkHandbooksP2RulesOnly.nsf/c0c6ffa99df4993f8625

6ba50057dcb8/e14db401df7f552e86256ca6005211b7#RULE%202-2.11%20Recusal

RULE 2-2.11 Recusal

(A) A judge shall recuse himself or herself in any proceeding in which the judge’s impartiality

might reasonably be questioned, including but not limited to the following circumstances:

(1) The judge has a personal bias or prejudice concerning a party or a party’s

lawyer or knowledge of facts that are in dispute in the proceeding that would

preclude the judge from being fair and impartial.

(2) The judge knows that he or she, individually or as a fiduciary, or the judge’s

spouse, parent, or child wherever residing, or any other member of the judge’s

family residing in the judge’s household is:

(a) a party to the proceeding, or an officer, director, general partner, managing member, or trustee

of a party;

(b) acting as a lawyer in the proceeding;

(c) a person who has more than a de minimis interest that could be substantially affected by the

proceeding; or