Mo. Rev. Stat. § 72.120: Rights of property retained.

All rights and property of every kind and description, which were vested in any city under its former organization, shall be deemed and held to be vested in such city upon its becoming reorganized as provided in sections 72.090 to 72.110, but no rights or liabilities, either in favor of or against such city, existing at the time of so becoming reorganized, and no suit or prosecution of any kind shall be affected by such change, but the same shall stand and progress as if no change had been made.