Mo. Rev. Stat. § 545.350
Current with changes from the 2023 Legislative Session
It shall not be necessary to pay or tender any fees whatever to any witness summoned on the part of the state or on the part of the defendant, but such witness shall be bound to attend and be liable for his nonattendance in the same manner as if the fees allowed to witness had been duly paid to him.
§ 545.350, RSMo
RSMo 1939 § 4009