Your search Notice: Eighth Circuit Rule 28a(k) Governs Citation of Unpublished Opinions and Provides That They Are Not Precedent and Generally Should Not Be Cited Unless Relevant to Establishing the Doctrines of Res Judicata, Collateral Estoppel, the Law of the Case, or if the Opinion Has Persuasive Value on a Material Issue and No Published Opinion Would Serve As Well.joan Valentine Mohamed, Formerly Known As Joan Valentinekerr, Plaintiff, v. Unum Life Insurance Company, a Maine Corporation, Defendant/appellee, v. Kevin Scott Kerr; Estate of Ivan S. Kerr, Defendants/appellants did not match any document.