Mo. Rev. Stat. § 196.060
For the purpose of enforcing the provisions of sections 196.010 to 196.120, carriers engaged in interstate commerce, and persons receiving foods, drugs, devices, or cosmetics in interstate commerce, shall upon the request of an officer or employee duly designated by the department of health and senior services, permit such officer or employee to have access to and copy all records showing the movement in interstate commerce of any food, drug, device, or cosmetic, and the quantity, shipper and consignee thereof; and it shall be unlawful for any such carrier or person to fail to permit such access to and copying of any such record so requested when such request is accompanied by a definite statement in writing specifying the nature or kind of food, drug, device, or cosmetic to which such request relates; provided, that evidence obtained under this section shall not be used in a criminal prosecution of the person from whom obtained; provided further, that carriers shall not be subject to the other provisions of sections 196.010 to 196.120 by reason of their receipt, carriage, or delivery of foods, drugs, devices, cosmetics, or advertising matter in the usual course of business as carriers.
§ 196.060, RSMo