Mo. Rev. Stat. § 115.037

Any commissioner may be removed by the governor for misconduct in office. Before removing a commissioner, the governor shall notify the commissioner in writing of all charges against him. Not less than ten days after so notifying a commissioner, the governor shall give the commissioner an opportunity to be publicly heard in person or by counsel in his defense. If a vacancy on any board occurs for any reason, the governor shall, with the advice and consent of the senate, appoint a new commissioner to serve the unexpired term. The new commissioner shall be a member of the same political party as the commissioner he is appointed to replace.