Whether Congress may use 18 U.S.C. § 3501 to replace Miranda's warning requirement with a totality-of-the-circumstances test focused solely on voluntariness.
Holding
No. Miranda announced a constitutional rule, so Congress may not supersede it by statute; Miranda governs the admissibility of custodial statements in federal and state courts.
Reasoning
Section 3501 was plainly intended to displace Miranda. It directs federal courts to admit a confession if voluntary and treats such matters as warnings about silence and counsel as only nonconclusive factors in a totality-of-the-circumstances inquiry. That approach conflicts directly with Miranda, which generally bars the prosecution's use in its case in chief of statements from custodial interrogation unless adequate warnings and waiver procedures were observed.
Congress may alter judicial rules of evidence and procedure that rest only on the Supreme Court's supervisory authority over federal courts. But Congress cannot override the Court's interpretations of the Constitution. The central question, therefore, was whether Miranda was a merely judicially created evidentiary rule or a constitutional decision.
Miranda must be constitutional because the Court applied it to state criminal proceedings from the outset and has repeatedly continued to do so. The Supreme Court has no general supervisory authority over state courts; it can require state courts to follow a rule only when the rule enforces the Federal Constitution. The Court's treatment of Miranda claims in federal habeas proceedings likewise supports the conclusion that Miranda has a constitutional basis.
The text and reasoning of Miranda itself repeatedly described its safeguards as measures required to protect the Fifth Amendment privilege against compelled self-incrimination during the inherently coercive setting of custodial interrogation. Although later cases sometimes called the warnings 'prophylactic' and recognized limited exceptions, those descriptions did not reduce Miranda to a nonconstitutional rule. Constitutional doctrine may be refined as new factual settings arise without losing its constitutional character.