Mo. Rev. Stat. § 71.185: Tort liability for governmental acts, insurance, trial.

1. Any municipality engaged in the exercise of governmental functions may carry liability insurance and pay the premiums therefor to insure such municipality and their employees against claims or causes of action for property damage or personal injuries, including death, caused while in the exercise of the governmental functions, and shall be liable as in other cases of torts for property damage and personal injuries including death suffered by third persons while the municipality is engaged in the exercise of the governmental functions to the extent of the insurance so carried.

2. In all suits brought against the municipality for tort damages suffered by anyone while the municipality is engaged in the exercise of governmental functions, it shall be unlawful for the amount of insurance so carried to be shown in evidence, but the court shall be informed thereof and shall reduce any verdict rendered by a jury for an amount in excess of such insurance to the amount of the insurance coverage for the claim.