Missouri Revised Statutes Title XXVI. Trade and Commerce § 409.521. Commissioner may make investigations, seek injunctions, when

1. The commissioner of securities may conduct such investigation as he deems necessary concerning any takeover bid for the purpose of determining compliance with the requirements of sections 409.500 to 409.566. As part of such investigation the commissioner of securities may require persons to file statements in writing and under oath with his office, subpoena witnesses, compel their attendance, examine them under oath and require the production of books, records, documents and papers.

2. In the event the commissioner of securities determines that any person is violating or about to violate any provision of sections 409.500 to 409.566, or any order, rule or regulation issued pursuant thereto, he may seek, in court, an injunction temporarily or permanently barring that person from making or taking part in or continuing a takeover bid or from taking up or paying for shares tendered by offerees pursuant to a takeover bid, and the court may grant the relief applied for or so much thereof as it may deem proper.