Mo. Rev. Stat. § 491.130
Current with changes from the 2023 Legislative Session
A witness shall not be compelled to attend, as such, in a civil suit, at a greater distance than forty miles from his place of residence, unless his legal fees for traveling, in going to and returning from the place of trial, and one day's attendance, are paid or tendered to him at the time of summoning such witness.
§ 491.130, RSMo
RSMo 1939 § 1899