This appeal presents questions concerning the legality of an investigatory stop, a war-rantless automobile search, and an ensuing interrogation. Contrary to appellant’s importuning, we hold that the Supreme Court’s opinion in
California, v. Hodari D.,
1. FACTUAL BACKGROUND
We offer a decurtate summary of the events pertinent to this appeal, recounting them in a manner consistent with the district court’s supportable findings of fact.
Upon being alerted by a reliable informant about narcotics-related' activity at a certain dwelling in Lowell, Massachusetts, the federal Drug Enforcement Administration (DEA) mounted a surveillance. On February 4, 1992, federal agents observed defendant-appellant Walter Dejesus Zapata drive from the site of thе surveillance to another address. 1 He entered a house at that address and helped to load two duffel bags into the trunk of a second car. Appellant departed in the laden vehicle. He drove in an unorthodox manner, bobbing, weaving, continually changing lanes, and alternating driving speeds. Finally, he swerved sharply from a high-speed throughway into an adjacent rest area, without signalling. The trailing DEA agent followed and radioed for help. By this time, the authorities had verified that the car driven by appellant was unregistered and uninsured. 2
Appellant left his vehicle and entered a fast-food restaurant. Four law enforcement officers followed him inside; only one of the officers, state trooper Doekrey, was in uniform and carrying a visible weapon. A fifth officer watched the entire exchange, unseen, from a distance. As the quartet approached appellant, Trooper Doekrey placed his palm on appellant’s back for two or three seconds, gestured away from the crowd, and politely *974 asked appellant to accompany the officers to a secluded corner of the restaurant. Appellant complied. A discussion ensued. When appellant stated that he had been dropped off at the rest area by anonymous “friends,” the officers informеd him that they knew this to be a lie. They then suggested that appellant accompany them to the parking lot. Once again, appellant agreeably acquiesced. The party proceeded to the spot where appellant had parked the vehicle in which he had arrived.
The officers inquired if they might search the automobile — but they did not tell appellant that he had the right to withhold his consent. Appellant replied, “Sure, go ahead,” and, upon request, relinquished the keys. The officers found the two duffel bags in the trunk. In response to a question, appellant denied knowing who owned them. One of the bags was partially unzipped. Through the opening, the officers spied a type of packaging commonly used for cocaine. An officer removed the package, dropped it onto the nearby fender, and watched as it emitted a puff of white pоwder. Further examination disclosed approximately 25 kilograms of cocaine. At that point, the DEA agents arrested appellant, handcuffed him, and read his Miranda rights once in Spanish and twice in English. Appellant promptly confessed that he was en route to a rendezvous with drug traffickers.
II. PROCEEDINGS BELOW
On February 26,1992, a federal grand jury returned a two-count indictment charging Zapata and two codefendants with conspiracy to possess cocaine, intending to distribute the drug, and with the underlying substantive offense. See 21 U.S.C. §§ 846, 841(a)(1); see also 18 U.S.C. § 2 (aiding and abetting). On March 26, Zapata filed a motion to suppress in which he claimed an illegal search and seizure. He sought to suppress, inter alia, the cocaine found in the automobile and the statements he had made to law enforcement officers after his arrest.
Following a three-day evidentiary hearing, the court below concluded that, when the officers originally approachеd appellant, they had a satisfactory basis for reasonable suspicion. In light of the factual predicate — the informer’s tip, the observations made during the surveillance, and the elusive manner in which appellant drove to the rest area — we regard this finding as irreproachable.
See, e.g., United States v. Sokolow,
Turning to the nature of the detention, the court pointed out that, in the initial encounter, the police neither restricted appellant’s movements nor prevented him from leaving the scene. At all times, the officers’ demeanor was non-coercive; they spoke courteously, in low, non-threatening tonеs, and — with the lone exception of Trooper Dockrey’s pat on the back — refrained from touching appellant, encircling him, or brandishing their weapons. The court also determined that appellant fully understood what was happening, and “seemed eager to cooperate.” In sum, the initial detention amounted merely to an investigatory stop, justified by reasonable suspicion.
3
See, e.g., Terry,
Taking matters a step further, the court ruled that, because appellant voluntarily consented to the car search, no basis existed for suppression of the items taken from the trunk. The court also ruled appellant’s confession to be admissible because he had waived his Fifth Amendment privilege against self-incrimination in compliance with the Miranda requirements. Accordingly, the court denied the motion to suppress.
*975 Thereafter, a jury found appellant guilty on both counts of thе indictment. On March 16, 1993, the district court imposed a ten-year incarcerative sentence. In this appeal, appellant contests only the denial of his suppression motion.
III. STANDARD OF REVIEW
A district court’s findings of fact on a motion to suppress are reviewable only for clear error as to consent,
see United States v. Miller,
Notwithstanding the deference with which factual findings are to be treated, questions of law remain subject to
de novo
review. This phenomenon sets the stage for a more nuanced statement of appellate practice in Fourth Amendment cases. 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.
See United States v. Infante-Ruiz,
IV. ANALYSIS
Appellant argues that the initial seizure of his person amounted to a de facto arrest; that he did not voluntarily consent to the subsequent search; that the contraband found in the car’s trunk would not necessarily have been discovered; and that the illegal practices in which the agents engaged rendered both the fruits of the search and the ensuing confession inadmissible. We subdivide this multi-layered argument into several components.
A. The Initial Encounter.
There is no scientifically precise formula that enables courts to distinguish between investigatory stops, which can be justified by reasonable suspicion, and other detentions that the law deems sufficiently coercive to rеquire probable cause — detentions that are sometimes called
“de facto
arrests.”
See Florida v. Royer,
Despite these circumstances, we cannot say that the district court erred in assessing the initial encounter and concluding that a reasonable person, standing in appellant’s shoes, would have felt unrestrained. The encounter occurred in a public place. Most of the officers were in plain clothes. Their approach was measured, their words polite, their conduct not bellicose. They neither voiced threats nor brandished their weapons. Certainly, the atmosphere at the scene was visibly less coercive than in
Quinn,
a case in which we overturned the district court’s finding that a reasonable person would have thought himself under arrest given the presence of five police officers, a sniffing dog, and a vehicle obstructing egress,
see Quinn,
Nonetheless, the government is not entirely out of the woods. Appellant, adverting to the slight physical touching, constructs an arresting argument based on certain language contained in
California v. Hodari D.,
On appeal, Hodari challenged the government’s right to introduce the evidence. Its admissibility turned on the question of when the police “seized” Hodari — at the moment the chase began or at the time of the tackle.
See id.
at 623-24,
Appellant attempts to stretch
Hodari
past the breaking point. He uses as a lever the Court’s statement that “an arrest is effected by the slightest application of physical force.”
Id.
at 625,
This construct is not original. The Seventh Circuit recently rejected a virtually identical argument, holding that,
Hodari
notwithstanding, a constructive arrest occurs only when the touch first effects a seizure, but not when an investigatory stop (itself a form of seizure) is already in progress at the time of the contact.
See United States v. Weaver,
In
Hodari,
Justice Scalia used the term “arrest” in its common law sense. He understood common law arrest to be coterminous with the modern conception of “seizure of the person.”
Hodari,
Glimpsed in this light,
Hodari
cannot bear the weight that appellant piles upon it. After all, “[o]ur Fourth Amendment jurisprudence has long recognized that the right to make an arrest
or investigatory stop
necessarily carries with it the right to use some degree of physical coercion.”
Graham v. Connor,
On this understanding of
Hodari,
we cannot say that the lower court erred in concluding that no
de facto
arrest occurred. Although an officer did touch appellant, that datum merely establishes that a seizure occurred; it does not dispose of the quеstion of what sort of seizure took place.
4
What is decisive in this ease is that nothing the officers did, alone or in combination, including the modest laying-on of hands, sufficed to convert the investigatory stop already in progress into an arrest.
See, e.g., United States v. Willis,
B. Voluntariness of Consent.
Next, appellant asseverates that the district court erred in concluding that he voluntarily consented to the automobile search. We do not agree. The court had before it evidence of express consent, along with evidence of consent inferable from conduct. Appellant freely surrendered the keys to both the doors and the trunk; and it is settled law that the act of handing over one’s ear keys, if uncoerced, may in itself support an inference of consent to search the vehicle.
See United States v. Patrone,
Nothing occurred in this case to neutralize the inference of consent. Although appellant harps on the officers’ failure to inform him of his right to refuse permission, the rule is that a failure to inform a suspect that he is entitled to withhold his consent to a vehicle search, though relevant to the issue of voluntariness, does not preclude a finding of consent.
See, e.g., Schneckcloth v. Bustamonte,
Because thе duffel bags were lying in the trunk, appellant’s general consent to a search of the automobile constituted
*978
consent to a search of the duffel bags.
See Jimeno,
C. Inevitable Discovery.
Even if the defendant’s consent were somehow tainted, and the search invalid, suppression would not lie in this instance for the contraband inevitably would have been discovered. Evidence which
comes to
light by unlawful means nonetheless can be used аt trial if it ineluctably would have been revealed in some other (lawful) way,
see Nix v. Williams,
In this case, all the relevant criteria are satisfied. The record establishes unequivocally thаt the car containing the contraband was unregistered and uninsured. Because the car could not lawfully be driven on a public highway,
see supra
note 2, the state police surely would have impounded it and, in accordance with standard practice, conducted a routine inventory search.
6
In the process, the two large bags of cocaine in the vehicle’s trunk would certainly have come to. light. Courts have regularly approved invеntory searches of impounded motor vehicles despite the absence of probable cause,
see, e.g., Colorado v. Bertine,
D. The Confession.
Although appellant challenges the district court’s refusal to suppress his confession, he bases his challenge on the taint arising from the claimed shortcomings in the initial encounter and vehicle sеarch. Because the red flag of constitutional infirmity does not fly from these ramparts — the investigatory stop, the search, and the ensuing arrest all pass constitutional muster — and because the requisite Miranda protections were scrupulously observed, the court below appropriately declined to quarantine appellant’s confession.
V. CONCLUSION
We need go no further. No reversible error appearing, the judgment of convictiоn, must be
Affirmed.
Notes
. The trial record reflects, and appellant’s counsel confirmed at oral argument, that contrary to the more prevalent Hispanic custom appellant prefers to use the last of his given names as his surname. We will, therefore, honor his nomen-clative preference and refer to him as "Zapata."
. In Massachusetts, it is unlawful to operate on a public highway a motor vehicle that is unregistered, see Mass.Gen.Laws ch. 90, § 9 (1986), or one that is uninsured, see id. § 34J.
. The court аlso found that, had the initial seizure risen to the level of an arrest, it would have been illegal because probable cause did not exist at that time. The government says that this finding is patently erroneous. We need not reach the question and take no view of it.
. Of course, the fact of physical contact is relevant to the reasonableness of a suspect's perception that he is under arrest.
See United States v. Perea,
. We note that this principle is totally consistent with the precept that ownership and a subjective expectation of privacy are among the key factors that trigger the right to privacy.
See Aguirre,
. An inventory search is a wholly independent legal procedure serving legitimate governmental еnds and circumscribed by standardized rules.
See Colorado v. Bertine,
. We decline to embrace the suggestion that courts should confine thе inevitable discovery rule to cases in which the disputed evidence comprises a derivative, rather than primary, fruit of unlawful police conduct.
See United States v. $639,558 in United States Currency,
