(December 10, 2019, 9:54 AM EST) -- ST. LOUIS — The Eighth Circuit U.S. Court of Appeals on Dec. 6 found that an appellant’s failure to administratively exhaust her breach of fiduciary claim against Aetna Life Insurance Co. is fatal to her subsequent action against the insurer under the Employee Retirement Income Security Act (Lisa Jones v. Aerna Life Insurance Company, et al., No. 18-1851, 8th Cir., 2019 U.S. App. LEXIS 36267)....