Mo. Rev. Stat. § 228.100
If it appears that any person through whose lands such proposed road should run has failed or refused to relinquish the right-of-way, or is not willing to take the amount of damages offered him by the commission or petitioners, or both, or in case any such owner is incapable of contracting or is a nonresident of this state, and it further appears to the county commission that the proposed road is of such great public utility as to warrant its establishment, the county commission shall order the road established and shall direct the prosecuting attorney of the county to institute proceedings in the name of the county in the circuit court for the purpose of condemning such lands. Such proceedings shall be instituted and conducted by said prosecuting attorney under the provisions of chapter 523.
§ 228.100, RSMo