Your search Notice: Eighth Circuit Rule 28a(k) Governs Citation of Unpublished Opinions and Provides That They Are Not Precedent and Generally Should Not Be Cited Unless Relevant to Establishing the Doctrines of Res Judicata, Collateral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.carl Hamm, Appellant, v. A.l. Lockhart, Director, Adc; Sued As Art L. Lockhart;robert S. Clark, Hearing Officer Administrator, Varner Unit,adc; Willis Sargent, Warden, Varner Unit, Adc; Arthur J.hall, Major, Varner Unit, Adc; James Duke, Hearing Officer,varner Unit, Adc, Appellees did not match any document.