Mo. Rev. Stat. § 144.725: Failure to obey subpoena or to produce books, a misdemeanor.

If any person summoned as a witness by the director or by the designee of the director fails to obey the summons or refuses to testify or answer any material question or refuses to produce any book, record, paper or other data when required so to do, he is guilty of a misdemeanor. Nothing in this section shall be construed to deprive a person of any right, privilege or immunity guaranteed by the Constitution of the United States or the Constitution of the State of Missouri.