Charles Dickerson had been arrested for bank robbery and for using a firearm during a crime of violence, both federal crimes. He moved to suppress statements he made to the FBI because he had not received the "Miranda" warnings before he spoke to the FBI. The district court suppressed the statements, and so the government appealed. The Fourth Circuit reversed the district court, reasoning that § 3501 had supplanted the requirement that the police give the "Miranda" warnings because "Miranda" was not a constitutional requirement and therefore Congress could overrule that decision by legislation. The Supreme Court then agreed to hear the case.