that this “show of authority” effectively constituted a stop, therefore triggering Fourth Amendment protections. The government maintains that regardless of whether Officer Reynolds’ question constituted a “show of authority,” there was no seizure because Sea-ley ran from the officers and refused to submit to Officer Reynold’s inquiry.
As a preliminary matter, we set forth the applicable standard of review with respect to a motion to suppress. A district court’s findings of fact will only be disturbed if they are clearly erroneous. United States v. Zapata, 18 F.3d 971, 975 (1st Cir.1994); United States v. Rodriguez-Morales, 929 F.2d 780, 783 (1st Cir.1991), cert. denied, — U.S. -, 112 S.Ct. 868, 116 L,Ed.2d 774 (1992). This deferential standard is appropriate because the district court has a superi- or sense of what actually transpired during an incident by virtue of its ability to see and hear the witnesses who have first hand knowledge of the events. Zapata, 18 F.3d at 975; Rodríguez-Morales, 929 F.2d at 783. Questions of law, however, are subject to de novo review. Zapata, 18 F.3d at 975; Rodríguez-Morales, 929 F.2d at 783.
In scrutinizing a district court’s denial of a suppression motion, the court of appeals will review findings of fact for clear error, while at the same time subjecting the trial court’s ultimate constitutional conclusions to plenary oversight.
Zapata, 18 F.3d at 975 (citations omitted).
Under the Fourth Amendment, a seizure occurs when a police officer, by means of physical force or a show of authority, has in some way restrained the liberty of a citizen.
Terry v. Ohio, 392 U.S. 1, 19 n. 16, 88 S.Ct. 1868, 1879 n. 16, 20 L.Ed.2d 889 (1968). In
United States v. Mendenhall, 446 U.S. 544, 554, 100 S.Ct. 1870, 1877, 64 L.Ed.2d 497 (1980), a plurality first announced a test to determine if an individual’s liberty had been restrained: “a person has been ‘seized’ within the meaning of the Fourth Amendment only if, in view of all of the circumstances surrounding the incident, a reasonable person would have believed that he was not free to leave/The Supreme Court subsequently embraced this analysis.
See Michigan v. Chesternut, 486 U.S. 567, 573, 108 S.Ct. 1975, 1979, 100 L.Ed.2d 565 (1988);
Immigration & Naturalization Service v. Delgado, 466 U.S. 210, 215, 104 S.Ct. 1758, 1762, 80 L.Ed.2d 247 (1984). The Supreme Court later explained that a person’s reasonable belief that he was not free to leave was “a
necessary, but not
sufficient condition for seizure.”
California v. Hodari D., 499 U.S. 621, 628, 111 S.Ct. 1547, 1551, 113 L.Ed.2d 690 (1991) (emphasis in original). The Supreme Court went on to hold that with respect to a seizure based upon an officer’s show of authority, no seizure occurs until the suspect has submitted to that authority.
Id. at 626, 111 S.Ct. at 1551;
see also Zapata, 18 F.3d at 976.
The facts of Hodari D. are analogous to the instant case. In Hodari D., a group of youths fled at the approach of an unmarked police car. 499 U.S. at 623, 111 S.Ct. at 1549. The police officers were suspicious, and they gave chase. Id. The state conceded that the officers did not have the reasonable suspicion required to justify stopping Hodari. Id. at 623 n. 1, 111 S.Ct. at 1549 n. 1. One officer followed the defendant, Hodari, and during the pursuit,- Hodari tossed out a “rock” of crack cocaine. Id. at 623, 111 S.Ct. at 1549. The officer then tackled Hodari, and handcuffed him. Id. In the juvenile proceedings brought against him, Hodari moved to suppress the evidence relating to the cocaine, and the court denied the motion. Id. Ho-dari appealed and challenged the government’s right to introduce the evidence. The admissibility of the evidence turned on whether the police seized Hodari at the moment the chase began or at the time of the tackle. The Supreme Court held that where a suspect fails to submit to an officer’s approach and runs away, he is not seized until he is apprehended. Id. at 626, 111 S.Ct. at 1551. Hodari was therefore not seized until he was tackled, and the cocaine was therefore admissible evidence.