Custodial interrogation, waiver, and suppression of statements.
South Dakota courts apply both the U.S. Constitution and the South Dakota Constitution to miranda rights claims. When state protections are broader than federal ones, South Dakota judges follow the state rule. When they are equal or narrower, federal precedent controls under the Supremacy Clause.
Federal cases governing miranda rights include controlling U.S. Supreme Court decisions and binding precedent from the federal circuit covering South Dakota. Civil remedies most often proceed under 42 U.S.C. § 1983, with defenses including qualified immunity.
Legal information, not legal advice. For advice on your situation, consult a licensed attorney in South Dakota.