An owner of a pizza parlor was killed during an attempted robbery. An informant supplied a possible lead implicating Dunaway (D) in the crime. There was only enough evidence to create a suspicion but not enough for probable cause. Nonetheless, three detectives took D into custody. D was not told he was under arrest, but he would have been physically restrained if he had attempted to leave. D was taken to police headquarters, placed in an interrogation room, and questioned after being read his Miranda rights. D eventually incriminated himself.