Mo. Rev. Stat. § 320.060: Duty of officers.

It is made the duty of all prosecuting attorneys in this state to institute and prosecute infractions of sections 320.010 to 320.060. Whenever it shall come to the knowledge of the chief of the fire department or commissioner of public buildings in any city, or the sheriff in any county, that any violation of sections 320.010 to 320.060 has occurred, it shall be his duty to report the fact to the prosecuting attorney.