Mo. Rev. Stat. § 84.341
No elected or appointed official of the state or any political subdivision thereof shall act or refrain from acting in any manner to impede, obstruct, hinder, or otherwise interfere with any member of a municipal police force established under sections 84.343 to 84.346 in the performance of his or her job duties, or with any aspect of any investigation arising from the performance of such job duties. This section shall not be construed to prevent such officials from acting within the normal course and scope of their employment or from acting to implement sections 84.343 to 84.346. Any person who violates this section shall be liable for a penalty of two thousand five hundred dollars for each offense and shall forever be disqualified from holding any office or employment whatsoever with the governmental entity the person served at the time of the violation. The penalty shall not be paid by the funds of any committee as the term committee is defined in section 130.011. This section shall not be construed to interfere with the punishment, under any laws of this state, of a criminal offense committed by such officials, nor shall this section apply to duly appointed members of the municipal police force, or their appointing authorities, whose conduct is otherwise provided for by law.
§ 84.341, RSMo