In this interlocutory appeal, the government challenges a suppression order entered in the United States District Court for the District of Massachusetts. It assigns error both to the district court’s determination that an investigatory encounter was undertaken without reasonable suspicion and to the court’s assessment of when a seizure occurred. We have jurisdiction under 18 U.S.C. § 3731.
The district court made the challenged rulings after holding an evidentiary hearing and mulling the impact of a unique set of circumstances. Judgments of this sort are notoriously fact-sensitive, and an appellate court should defer in large measure to the trial court’s superior coign of vantage. So it is here: although we, if sitting as a court of first instance, might not have drawn the same inferences from the underlying facts, we cannot say that the district court lacked the right to draw the inferences that it did. Nor can we say that, given those inferences, the court abused its discretion in suppressing the evidence. Accordingly, we affirm the suppression order.
I. BACKGROUND
In this case, the defendant stands accused of conspiracy to transport, and the transportation of, illegal aliens.
See 8
U.S.C. § 1324(a)(l)(A)(ii), (a)(l)(A)(v)(I). We begin our account with a concise summary of the events leading to those charges, as supportably found by the district court.
See United States v. Romain,
On the morning of February 7, 2005, defendant-appellee Benjamin Espinoza was a front-seat passenger in a commuter van bearing Texas license plates that was *45 traveling through Boston on Interstate 93. The van piqued the interest of Glen Fitzpatrick, an Immigration and Customs Enforcement (ICE) agent, who was en route to his office in an unmarked car.
Fitzpatrick was aware that, within the past year, Boston-based ICE agents had intercepted at least two similar extended-passenger vans engaged in the illegal transportation of aliens. Although the van had tinted windows, he could see the silhouettes of several persons (other than the driver and front-seat passenger) inside it. Consequently, he started following the van while at the same time contacting sector communications. This inquiry yielded information that the van was registered to Jesús Zendejas of Dallas, Texas. Fitzpatrick recognized Zendejas’s name as having appeared on a suspect’s telephone toll records in an earlier ICE investigation of human smuggling — an investigation that had not yet resulted in the filing of any criminal charges.
Fitzpatrick continued to follow the van surreptitiously for approximately twenty-five minutes. At around that time, the van left the expressway and proceeded on the Revere Beach Parkway. In due course, it pulled over and parked near a sandwich shop in Everett, Massachusetts. The driver, Ambrosio Villareal, did not turn off the engine but let it idle. No one disembarked from the van.
Fitzpatrick parked his car some fifty feet away in an adjacent lot and approached the stopped van on foot. He wore civilian clothes and carried a holstered firearm. Upon reaching the van, he flashed his badge and identified himself to Villareal as an immigration officer. Speaking in Spanish, he requested identification. Villareal complied. Then Fitzpatrick, using a hand motion, “directed Villareal to shut off the engine.”
United States v. Espinoza,
In approximately the same time frame, Fitzpatrick asked the defendant for identification. 1 The defendant proffered a Texas driver’s license and, in response to a direct question, informed Fitzpatrick that he was a naturalized citizen. To buttress that statement, he showed Fitzpatrick a photocopy of his naturalization papers. A conversation ensued regarding Mi Tierra and the employment of Villareal and the defendant as drivers for that firm.
Fitzpatrick next turned his attention to the five passengers in the rear of the van. He questioned them in Portuguese and learned that three of the five had been arrested in Texas by border patrol officers on February 4, 2005 — -three days earlier. All three had received notices to appear for removal proceedings. The other two men carried Brazilian passports but had no other identification. Upon completing this phase of his inquiry, Fitzpatrick read Villareal and the defendant their
Miranda
rights.
See Miranda v. Arizona,
II. STANDARD OF REVIEW
In examining the presence or absence of reasonable suspicion and the timing of a *46 seizure, we deal with mixed questions of law and fact. Each of those questions requires a searching appraisal of the particular factual context.
As to the first issue-the exis~ tence vel non of reasonable suspicion-we must "assess the totality of the circumstances, on a case-specific basis, in order to ascertain whether the officer had a particularized, objectively reasonable basis for suspecting wrongdoing." United States v. Coplin,
Given the textured nature o these inquiries, appellate courts must pro ceed circumspectly and with regard for th district court's superior vantage point See United States v. Zapata,
We remain mindful throughout that when two or more legitimate interpretations of the evidence exist, the factfin-der’s choice between them cannot be deemed clearly erroneous.
See Romain,
III. ANALYSIS
We subdivide our substantive discussion of the district court’s decision into two segments, corresponding to the government’s twin lines of argument.
A. Reasonable Suspicion.
Typically, brief investigatory stops can be grounded on reasonable suspicion as opposed to, say, probable cause.
See Terry v. Ohio,
Of course, precedent plays an important role in our system of justice, and the case law offers some general guidance. A finding of reasonable suspicion requires “ ‘a particularized and objective basis’ for suspecting the person stopped of criminal activity.”
Ornelas,
Here, the government alleges that Fitzpatrick initiated the encounter with the van’s occupants based on a reasonable suspicion of criminal activity, that is, a suspicion that they were engaged in the illegal transportation of undocumented aliens. The district court disagreed. It found, after hearing Fitzpatrick’s testimony, that his rationale for following the van, approaching it, and commencing an investigation of the individuals within was bottomed on a pale patina of facts. These included: (i) Fitzpatrick’s observation of an extended-passenger van bearing Texas license plates traveling on a highway in Massachusetts; (ii) his awareness that the van was registered to Zendejas, whose name had surfaced (albeit not as a target) during a previous investigation for human smuggling; and (in) his prior knowledge of the interception of “two and perhaps three similar passenger vans that were transporting illegal aliens” in the Boston area within the past year. D. Ct. Op. at 189. The district court commented that this patina, pale to begin with, faded even more in light of countervailing considerations such as Fitzpatrick’s admission that the Boston area was not a place generally associated with the smuggling of illegal aliens and the fact that he observed nothing unusual or unlawful about the van’s operation during his surveillance. Id. at 190. Indeed, the only “peculiarity” that Fitzpatrick had noted about the van “was that it bore Texas plates.” Id. at 190.
Weighing the facts as a whole, the court concluded that Fitzpatrick’s actions in approaching the van and starting to question its occupants were “based on nothing more than a hunch.” Id. With specific reference to the Zendejas connection, 3 the court added that the “tendrils of information known to Fitzpatrick about this individual [at the time of the encounter were] insufficient to transform the hunch into reasonable suspicion.” Id. at 190.
The government does not claim any error in the district court’s findings of raw fact. It does, however, attack with considerable ferocity the inferences drawn by the court from the facts as found. This attack overlooks that those
*48
inferences, too, are subject to clear error review.
See Ornelas,
In this instance, we think that the district court’s inferences, though not compelled by the facts, are nevertheless reasonable. Accordingly, they pass muster.
The requirement of reasonable suspicion as a basis for an investigatory stop reflects the core concerns of the .Fourth Amendment.
See Arvizu,
B. Seizure.
Our validation of the lower court’s finding that Fitzpatrick lacked reasonable suspicion at the outset of the encounter does not end our odyssey. In this case, the agent played no part in bringing the van to a halt; the driver stopped of his own volition and for his own reasons. Thus, even without reasonable suspicion, Fitzpatrick had a right to approach the parked vehicle and talk to its occupants if that interview was purely consensual.
See United States v. Barry,
The district court found, however, that this encounter was not consensual because a seizure occurred at the point when Fitzpatrick ordered Villareal to shut off the engine. On that basis, the court granted the defendant’s motion to suppress the statements made and papers produced in the interval between the command and the furnishing of Miranda warnings (including, of course, the fruits of those revelations). We turn now to that finding.
The case law offers. certain guideposts to assist in determining the nature of an encounter between law enforcement officers and civilians. Not every police-initiated conversation is a seizure.
See, e.g., Smith,
*49
The test is objective: Would a reasonable person standing in the shoes of the individual who is approached have felt free to cease interaction with the officer and depart?
Ornelas,
Here, the parties and the district court have framed the inquiry as a question of when the defendant was effectively seized by Fitzpatrick. 4 The government concedes that a seizure occurred at the point when Fitzpatrick informed the defendant of his Miranda rights. The defendant, however, places the seizure at an earlier step in the progression. The timing is of decretory significance because the evidence that the district court suppressed consisted mainly of statements made and documents tendered in the interval between these two moments in time.
The district court resolved this quandary in favor of the defendant. In doing so, the court relied upon the following facts: (i) Fitzpatrick, identifying himself as an ICE officer and wearing a holstered firearm, approached the van; (ii) he displayed his badge and began asking questions; and (iii) with a commanding tone and manner, he indicated that he wanted the driver to shut off the van’s engine. D. Ct. Op. at 188. Although Fitzpatrick protested during the evidentiary hearing that the nonverbal command to shut off the engine was given solely to facilitate conversation, the district court reasonably concluded that the absence of any evidence indicating that the van’s occupants knew or intuited this unspoken limitation was extremely significant. See id. at 188 n. 1.
In our view, this is a near-classic case of a set of facts that might — depending on the trier’s interpretation — support either of two competing inferences. On the one hand, it seems plausible that a reasonable person in the defendant’s shoes might have considered the encounter consensual and non-custodial. On the other hand, it seems equally plausible that a reasonable person in the defendant’s shoes might have felt constrained to remain seated in the stopped van and to respond to the agent’s queries. The district court concluded that the latter interpretation was the more likely scenario and, thus, ruled that Fitzpatrick had effectively seized the defendant when he ordered Villareal to shut down the engine. Because this inference from the facts as found was not clearly erroneous, the district court did not err in ordering suppression.
See United States v. Ladd,
In a last-ditch effort to turn the tide, the government argues that this case is controlled by our decision in
Smith.
In our view, however, these two cases are not fair congeners. In
Smith,
the district court determined that a seizure had occurred when two police officers exited their cruiser, approached the defendant on a public street, and asked him for identification.
Here, unlike in Smith, the officer did more than merely approach and propound routine questions. According to the district court, which made a supportable factual finding in this regard, Fitzpatrick commanded the driver to shut off the engine. See D. Ct. Op. at 188, 190. That command, in the circumstances of this case, may not have compelled a finding of coercion but it supports such a finding-land, thus, a finding that a seizure occurred then and there).
IY. CONCLUSION
We need go no further. The district court’s conclusion that a seizure occurred, unaccompanied by reasonable suspicion, is consonant with the facts as found and with the record. Accordingly, we uphold the district court’s order suppressing the evidence in question.
Affirmed.
Notes
. The government claims that the defendant volunteered information in English during Fitzpatrick’s initial conversation with Villareal. This characterization is premised on Fitzpatrick’s testimony that he recalls the defendant interjecting that he and Villareal were both employees of Mi Tierra. The district court appears not to credit this testimony. At any rate, even if we assume, favorably to the government, that this interjection occurred as Fitzpatrick described it, the result that we reach would not be affected.
. A finding is clearly erroneous only when, upon a careful review of the record, a court is left with a "definite and firm conviction that a mistake has been committed."
United States
v.
U.S. Gypsum Co.,
. Fitzpatrick testified on cross-examination that one of the previously intercepted vans was owned by Alfonso Garza, reputed to be a former business partner of Zendejas. The district court found that this information was new to the equation; Fitzpatrick did not know about this connection when he decided to follow and approach the van. See D. Ct. Op. at 189 n. 2. That finding was not clearly erroneous.
. In accepting this terminology, we do not imply any limitation on the doctrine that coercion, unaccompanied by reasonable suspicion, is constitutionally unacceptable.
See Florida v. Royer,
