Police investigating the murder of Roger Corpus arrested Richard Brown (defendant) at gunpoint after breaking into and searching his apartment. The police did not have a warrant or probable cause. Brown was taken to the police station, given the warnings set forth under Miranda v. Arizona, 384 U.S. 436 (1966), and interrogated. Brown made incriminating statements during the interrogation. Brown and Jimmy Clagett (defendant) were indicted by a grand jury for murder. Brown moved to suppress the incriminating statements on the grounds that the arrest was unlawful. The trial court denied the motion. The jury convicted Brown and sentenced him to 15 to 30 years imprisonment. The Supreme Court of Illinois affirmed. The United States Supreme Court granted certiorari.