About Us Whether your legal troubles stem from family, professional, or criminal law, Richards, Tonner, Oliver, Fischbach & Dell LLP Attorneys at Law have the experience you need to solve your problems. The attorneys practice a broad range of law in South Dakota. Experience Meets Knowledge The attorneys at Richards, Tonner, Oliver, Fischbach & Dell LLP have a combined experience of over 150 years. With many having practiced law in Federal and State Court, the experience each of our attorneys brings to the table is invaluable in helping you win your case and solve your problems.