Whether Royer was seized for Fourth Amendment purposes before he consented to the luggage search.
Holding
Yes. By the time the officers retained Royer's ticket and identification, identified themselves as narcotics agents, accused him of transporting drugs, and asked him to go to the police room without telling him he was free to leave, a reasonable person would not have felt free to depart.
Reasoning
Police may approach a person in a public place, identify themselves, ask questions, and request identification without necessarily making a Fourth Amendment seizure. A citizen ordinarily may decline to answer and may walk away; an officer needs no justification for a truly consensual encounter.
That changed here when the officers kept the documents Royer needed to travel, told him he was suspected of narcotics trafficking, and directed the encounter to a police room. Those actions were a show of official authority sufficient to make a reasonable person believe that he could not leave.