KANSAS CITY, Mo. - The doctrine of res judicata bars a claimant seeking underinsured motorist benefits from asserting a claim against an insurer because the claimant should have asserted the claim in the insurer's underlying liability suit filed in Missouri state court, a Missouri federal magistrate judge said Jan. 29 (Patricia Talbert v. Progressive Northwestern Insurance Co., No. 13-03379, W.D. Mo.; 2014 U.S. Dist. LEXIS 11076).