Mo. Rev. Stat. § 21.430

If any person, whether a member or not, disturbs the proceedings of any committee of either house, or is guilty of disorder in their presence, the house appointing the committee may punish the person as if the like offense were committed in the presence of the house; and if the disorder or offense is committed before a joint committee of both houses, the president of the senate shall issue process, and both houses in joint meeting proceed thereon.