Mo. Rev. Stat. § 546.370: Exceptions may be taken as in civil cases.

On the trial of any indictment or prosecution for a criminal offense, exceptions to any decisions of the court may be made in the same cases and manner provided by law in all civil cases; and bills of exceptions shall be settled, signed, sealed and filed as now allowed by law in civil actions, and the same proceedings may be had to compel or procure the signing and sealing of such bills, and the return thereof, as in civil cases.