Mo. Rev. Stat. § 33.140: Examination of witnesses and issuance of subpoenas.

Whenever the commissioner of administration may think it necessary to the proper settlement of any account, he may examine the parties, witnesses and others, on oath or affirmation, touching any matter material to be known in the settlement of such account, and for this purpose may issue subpoenas, and compel witnesses to attend before him and give evidence, in the same manner and by the same means allowed by law to courts of record.