Mo. Rev. Stat. § 622.530
In case a common carrier shall do, cause to be done or permit to be done any act, matter or thing prohibited, forbidden or declared to be unlawful, or shall omit to do any act, matter or thing required to be done by this chapter or by any order or decision of the division, such common carrier shall be liable to the persons or corporations affected thereby for all loss, damage or injury caused thereby or resulting therefrom, and in case of recovery, if the court shall find that such act or omission was willful, it may in its discretion fix a reasonable counsel or attorney's fee, which fee shall be taxed and collected as part of the costs in the case. An action to recover for such loss, damage or injury may be brought in any court of competent jurisdiction by any such person or corporation.
§ 622.530, RSMo