Mo. Rev. Stat. § 40.153: Witness, willful failure to appear or to produce evidence, penalty — prosecutor shall prosecute.

1. Any person not subject to sections 40.005 to 40.490 is guilty of a class C misdemeanor who:

(1) Has been duly subpoenaed to appear as a witness or to produce books and records before a military court or before any military or civil officer designated to take a deposition to be read in evidence before such a court;

(2) Has been duly paid or tendered the fees and mileage of a witness at the rates allowed to witnesses attending the circuit courts of this state; and

(3) Willfully neglects or refuses to appear, or refuses to qualify as a witness or to testify or to produce any evidence which that person may have been legally subpoenaed to produce.

2. Upon the certification of the facts under subsection 1 of this section by the military judge or summary court officer to the prosecuting attorney of the county where the offense occurred, the prosecuting attorney shall prosecute.