Carroll v. United States, 354 U.S. 394 (1957), was a case dealing with the appealablility of a suppression order issued by the Federal District Court for the District of Columbia for an unlawful warrant under the Fourth Amendment. In a unanimous 9-0 opinion written by Justice Warren, the Supreme Court of the United States reversed the Court of Appeals, stating that: The Court held that, although some orders may be appealable under the authority of 18 U.S.C. 1291, this order in this case lacked such authority. The Circuit Court was reversed and remanded.