Daniel Guzman-Padilla (“Guzman”) and Juan Vasquez-Rosales (“Vasquez”) (collectively, “Appellants”) appeal the district court’s denial of their motions to suppress evidence discovered during a stop and search of their vehicle by U.S. Border Patrol agents on February 4, 2007 near the border between the United States and Mexico. Believing that Appellants’ vehicle recently had crossed the border and was carrying contraband, Border Patrol Agent Marc Battaglini instructed that a controlled tire deflation device (“CTDD”) be deployed in the vehicle’s path. As intended, all four of the vehicle’s tires were deflated within approximately a half-mile, and the vehicle pulled to the side of the highway.
In the district court, Appellants argued that suppression was required because the use of the CTDD converted the stop into an “arrest” for which the requisite probable cause was lacking, and because the unannounced use of the device amounted to excessive force. The government argued, and the district court agreed, that the stop was an investigative detention authorized under the rubric of
Terry v. Ohio,
BACKGROUND
Our decision today is informed to a significant degree by the unique geographic and topographical features of the southeast corner of Imperial County, California, where the events underlying these appeals occurred. Of particular importance are two valleys called the A-7 and the Buttercup. Each consists of a rugged floor lined by tall sand dunes, many of which themselves contain interior valleys or depressions. Both valleys run uninterrupted from Mexico to a public campsite on the United States side of the border, where they converge. From that point, a paved road leads to Interstate 8. Border Patrol Agent Battaglini, a member of the Smuggler Targeting Action Team (“STAT”) who for six years has been deployed extensively in this part of the Imperial Sand Dunes, is intimately familiar with the local terrain. In his experience patrolling the area in a variety of transports ranging from all-terrain vehicles to Ford Expeditions such as the one driven by Appellants on the day in question, substantial vehicular modifications — such as elevated suspension systems or special “paddle tires” — are necessary to cross the dunes that abut either valley. Thus, “unmodified” four-wheel-drive vehicles are confined to the valley floor, which forms an unbroken conduit from Mexico to the United States. The valleys also converge in a manner that affords observers at the Buttercup Campground an unobstructed view of exiting dune traffic. As such, the location of the campground, which is less than two miles from the border, corresponds to a natural choke point for the interception of illicit goods or persons. The flow of such goods and persons is considerable: at the time of the events in question, Battaglini had been involved personally in the arrest of fifty to sixty drug or alien smugglers in the area.
At about 8:30 AM on February 4, 2007, Battaglini and fellow Border Patrol Agent Michael Harrington began their surveillance duty at the Buttercup Campground, training their sights on the outlets of the two valleys. Several times during the day, agents from the nearby Yuma Border Patrol Station drove into the A-7 Valley and reported no unusual vehicle sightings. The trickle of morning recreational traffic ebbed by early afternoon — likely because it was Super Bowl Sunday — and by mid-afternoon the dunes were empty. It was under these conditions that Appellants’ white Ford Expedition emerged from the A-7 Valley at approximately 3:30 PM. When first sighted, the vehicle was approximately one and a half miles from the border. From a distance of about a half-mile, Battaglini made several observations. First, he considered the vehicle’s speed— approximately twenty to twenty-five miles per hour — unusually fast for the terrain; he later testified that five miles per hour would be an appropriate speed to avoid “beating up” an ordinary four-wheel-drive vehicle. Second, he noticed that the vehicle bore no apparent modifications that would have permitted it to enter the valley from anywhere but its Mexican entrance to the south. Third, he observed that the vehicle lacked the orange safety flag and recreational permit required by the federal agency that manages the Imperial Dunes,
Battaglini radioed nearby members of the STAT Unit and informed them of the approaching vehicle. Soon thereafter, the Expedition drove directly past the agents’ unmarked patrol cars, affording the agents a view into its fully enclosed interior. Battaglini observed that the entire rear portion of the cabin was covered by a black tarp, something which he had seen exclusively in vehicles ultimately stopped for smuggling. He also noted that the vehicle bore Mexican license plates, a feature he considered rare in the Imperial Sand Dunes. Battaglini watched as the vehicle proceeded toward the highway, rolling through a stop sign, and, after passing the desired entrance ramp, reversing course in the middle of the road.
Collectively, Battaglini’s observations caused him to feel certain that the vehicle was smuggling drugs, aliens, or other illicit goods, and he determined to stop it using a CTDD. The device consists of an accordion-like tray containing small, hollow steel tubes that puncture the tires of a passing vehicle and cause a gradual release of air. The vehicle then ordinarily may travel for approximately a quarter to a half of a mile before complete deflation occurs. Battaglini testified that the Border Patrol uses CTDDs in three instances: where a vehicle (1) has made a “confirmed illegal entry” from Mexico; (2) has been observed taking on or discharging narcotics or illegal aliens; or (3) fails to yield during an attempted stop, giving rise to pursuit. Battaglini also testified that the Border Patrol does not use CTDDs in the vicinity of bridges, hills, curves in the roadway, or metropolitan areas, or in the presence of heavy traffic. He testified that several agents typically coordinate with one another during deployment of a CTDD to keep other motor traffic away from both the suspect vehicle and the device. He explained that the Border Patrol uses CTDDs as a first resort because smugglers rarely yield to lights or sirens and frequently engage in desperate attempts to escape apprehension, including by crossing freeway medians, driving into oncoming traffic, and leading officers on high-speed pursuits. He testified that in multiple cases, the use of lights and sirens caused erratic behavior that resulted in' the deaths of innocent bystanders.
Before authorizing deployment of the CTDD, Battaglini conferred with his supervisor by radio, confirming, based on the circumstances of its emergence from the A-7 Valley, that Appellants’ vehicle had made an illegal entry. Battaglini and Harrington followed the vehicle for approximately ten miles before the device was deployed by another member of the STAT Unit. Presumably because it was the afternoon of Super Bowl Sunday, highway traffic was light, and the agents kept what little traffic there was away from the zone of deployment. The stretch of road where the device was deployed was open and flat, with no nearby structures, hills, or other hazards. After Appellants’ vehicle passed over the spike strip, both agents activated their lights and sirens. The Expedition proceeded approximately a half-mile before its tires went flat and it pulled to the side of the road.
As Battaglini stepped out of his vehicle, the door of the Expedition swung open and Vasquez began to exit. At that moment, Battaglini encountered a strong odor of marijuana. He approached the vehicle with his weapon drawn and ordered Vasquez to remain inside. When he reached the vehicle, he removed Vasquez, handcuffed him, ordered him onto his knees, and patted him down. Agent Harrington restrained Guzman. The agents then discovered approximately 479.95 kilograms (1,058.1 pounds) of marijuana, which had
Vasquez and Guzman were indicted on charges of possession with intent to distribute 100 kilograms or more of marijuana. The district court held three days of evidentiary hearings on their motions to suppress, during which the government relied exclusively on the testimony of Battaglini, while the defense offered a declaration by Vasquez and the testimony of Robert Davidson, a recreational user of the Imperial Sand Dunes who visits the area several times a year. When the district court denied the motions to suppress, the defense moved for reconsideration and offered the declaration of Jack Smith, a use-of-force expert who stated in essence that tire deflation devices are dangerous and unjustified under the circumstances that were present. Unpersuaded by Smith’s declaration, the district court reaffirmed its prior ruling.
ANALYSIS
When a vehicle is stopped by law enforcement, all of its occupants are “seized” for Fourth Amendment purposes.
Brendlin v. California,
The first aspect of the reasonableness inquiry concerns the level of suspicion that the government’s agents must possess to justify their intrusions. Without such justification, a seizure is per se unreasonable. Traditionally, all Fourth Amendment “seizures” constituted “arrests” and therefore required probable cause.
Dunaway v. New York,
The second aspect of the inquiry concerns the manner in which a seizure is conducted — typically whether law enforcement used excessive force.
See Graham v. Connor,
In accordance with these principles, we must determine as a threshold matter what level of suspicion was required to render the Border Patrol agents’ stop of Appellants’ vehicle “reasonable.” The possible justifications for intrusion range from no suspicion if the seizure was incident to a “border search” or its functional equivalent, to “reasonable suspicion” if the seizure was incident to an “extended border search,” to probable cause if the seizure nonetheless constituted an “arrest.” 1 Next, we must decide whether the manner in which the agents effected the stop was excessively forceful and therefore unreasonable.
I. SEARCHES AND SEIZURES AT THE BORDER
A. General Principles
The legality of a border search is reviewed
de novo. United States v. Romm,
Border searches need not occur at an actual border, but may take place at the “functional equivalent” of a border, or at an “extended” border.
United States v. Cardona,
B. Classification of the subject search and seizure
The government argues that the search and seizure at issue here occurred at the functional equivalent of the border. We are inclined to disagree. Our cases are consistent with the Fifth Circuit’s observation that “[t]he main difference between the functional equivalent of the border search and an extended border search is that the latter takes place after the first point in time when the entity might have been stopped within the country.”
United States v. Niver,
By contrast, the extended border search doctrine clearly contemplates the situation we confront here. “Extended border searches are typically separated from the border by ‘a greater spatial and temporal distance’ from the actual border than searches at the functional equivalent of the border,”
Abbouchi,
There are two reasons why we need not decide precisely what type of border search occurred here. First, the seizure required to effect the search of Appellants’ vehicle clearly was more than a “routine” search of the kind permissible in the absence of suspicion. Highly intrusive searches require reasonable suspicion, even if they are conducted at the functional equivalent of the border.
United States v. Flores-Montano,
Second, as we explain below, and as Appellants effectively concede, the presence of reasonable suspicion is beyond dispute in this case. We are constitutionally forbidden from issuing advisory opinions, and we decline to decide a “dispute over whether or not a particular search may be conducted in the absence of any suspieion[,][where that dispute] is an entirely fictional construct.”
Chaudhry,
C. Reasonable certainty of crossing
We assess the existence of reasonable certainty of a border crossing by examining “the totality of the surrounding circumstances, including the time and distance elapsed[from the border] as well as the manner and extent of surveillance.”
Alexander,
Reasonable certainty “is a higher standard than that of probable cause, [but] it does not require knowledge beyond a reasonable doubt.”
Corral-Villavicencio,
Application of the extended border search doctrine may be defeated when “conditions ... have become so vulnerable to change after a border crossing as to rebut any reasonable certainty that contraband later found was aboard a carrier at entry.”
Alfonso,
In the case before us, several factors appear to support a finding of reasonable certainty. First, the outlet of the A-7 Valley, from which Battaglini- first observed Appellants’ vehicle, lies only one and a half miles from the Mexican border. Second, Battaglini testified that the large dunes flanking the valley between its origin in Mexico and its terminus in the United States are impassable to all but specially modified vehicles, and that Appellants’ vehicle did not appear to be specially equipped or modified. Third, Battaglini stressed that the absence of any reports of vehicle traffic in the A-7 by roving border patrol vehicles earlier in the day eliminated the possibility that Appellants’ vehicle merely had lingered in the area from the previous day. Finally, he observed that the vehicle’s unusual speed and unwavering trajectory suggested the absence of any recreational purpose.
In the district court, the defense offered the testimony of Robert Davidson, an off-road vehicle enthusiast who visits the Imperial Sand Dunes several times a year. Davidson stated that he had been able to traverse the A-7 dunes in unmodified vehicles, but he admitted that his vehicle was fitted with larger-than-normal tires. Davidson also indicated the existence of several alternate routes at the northern end of the A-7 Valley, the availability of which might negate the inference that a vehicle emerging from the valley at the
The evidence offered in the district court was sufficient to establish a “reasonable certainty” that a border crossing had occurred, such that any contraband found in Appellants’ vehicle confidently could be considered to have crossed the border. That Battaglini did not see the actual crossing or maintain continuous surveillance over the vehicle from the time of suspected crossing is not determinative under our case law. Given the unique topographical and geographic features of the area in question, Battaglini’s “vantage point ... enabled him to be reasonably certain that the [vehicle] he saw came from Mexican [territory].”
Bennett,
D. Reasonable suspicion
Determinations of reasonable suspicion are reviewed
de novo,
while factual findings underlying those determinations are reviewed for clear error, giving “due weight to inferences drawn from those facts by resident judges and local law enforcement.”
Ornelas v. United States,
The government points to the following facts to support a finding that Battaglini’s suspicion of criminal activity was reasonable: the area’s well-known'use as a smuggling route; the agents’ “reasonable certainty” that Appellants’ vehicle had just crossed illegally from Mexico; the vehicle’s failure to display the required use permit or orange recreational safety flag; the vehicle’s Mexican plates, which Battaglini considered rare in the dunes; the vehicle’s straight trajectory and unusually high speed when traveling over the rough, washboard-like road to the Buttercup Campground, and its haste and sudden maneuvers in accessing the highway, followed by its slow and cautious speed once on the highway; and, finally, the covering of the rear interior compartment of the vehicle by a black tarp even though the rear windows already were “blacked out.”
Based on these facts, largely in the form of testimony by Battaglini, the district court found that “there were many, many factors that ... could lead to only one conclusion, and that was that this vehicle was smuggling either aliens or drugs.” Independent of the district court’s conclusion, nearly every one of the factors used to evaluate whether an officer possessed the requisite degree of suspicion supports a finding that Battaglini’s suspicion was reasonable. While Appellants did raise a question as to whether the vehicle merely might have made a “detour” into Mexico from one of several nearby locations in the United States before returning through the A-7 Valley, that suggestion is inconsistent with the totality of the other circumstances surrounding the emergence of the vehicle. The circumstances were more than sufficient to “paint a picture that would create in the mind of a trained border patrol agent a reasonable suspicion that the[vehicle’s occupants were] engaged in criminal activity.”
United States v. Franco-Munoz,
II. SEIZURES INCIDENT TO BORDER SEARCHES
Having established that the agents were entitled to conduct an extended border search of Appellants’ vehicle, we pause to address Appellants’ contention that the border search doctrine has no place in assessing the reasonableness of a related Fourth Amendment seizure, and that our Terry-stop jurisprudence should control.
2
Appellants are correct that the government’s success in demonstrating an entitlement to conduct a border search does not end our inquiry, since there remains the possibility that the incidental detention or seizure amounted to an “arrest” requiring probable cause, or that the manner of the detention or seizure was otherwise unreasonable. But our cases confirm that under appropriate circumstances, Fourth Amendment seizures may be analyzed entirely within the confínes of the border search doctrine.
See, e.g., United States v. Nava,
In
United States v. Bravo,
While the “fit” between the Terry-stop framework and border searches undoubtedly is “imperfect,”
id.,
the situation we face here — a decidedly non-routine stop of an individual at a location other than a fixed border crossing — still implicates considerations traditionally addressed under the
Terry
rubric. We therefore “use the Terry-stop cases to guide our analysis.”
Bravo,
A. Seizure as investigative detention versus arrest
The Supreme Court “has been careful to maintain [the] narrow scope” of
Terry’s
exception to the probable cause requirement, and has referred to
Terry
stops as a
“sui generis
‘rubric of police conduct.’ ”
Dunaway,
First, it is well-established that intrusive measures may convert a stop into an arrest if the measures would cause a reasonable person to feel that he or she will not be free to leave after brief questioning — i.e., that indefinite custodial detention is inevitable.
Kraus v. Pierce County,
Second, because “[t]he purpose of a
Terry
stop is to allow the officer to pursue his investigation without fear of violence,”
United States v. Taylor,
The second inquiry frequently proves determinative. As the First Circuit recognized in United States v. Acosta-Colon, while
[i]t is often said that an investigatory stop constitutes a de facto arrest when a reasonable man in the suspect’s position would have understood his situation ... to be tantamount to [an] arrestf,] .... in a typical borderline case, e.g., one in which the detention at issue has one or two arrest-like features but otherwise is arguably consistent with a Terry stop, it will not be obvious just how the detention at issue ought reasonably to have been perceived; indeed, this will be the central point of contention. Thus, in ...a case ... where the detention is distinguishable from, yet has some features normally associated with, an arrest[,] ... the analysis must revert to an examination of whether the particular arrest-like measures implemented can nevertheless be reconciled with the limited nature of a Terry-type stop. This assessment requires a fact-specific inquiry into whether the measures used were reasonable in light of the circumstances that prompted the stop or that developed during its course.
B. The February 4, 2007 stop
While anyone in Appellants’ situation would have felt constrained to remain at the scene immediately after his or her tires had been deflated and as agents approached the vehicle, it does not follow that the mere use of a CTDD to stop the vehicle would have caused an innocent person to believe that a prolonged custodial detention. amounting to an arrest was about to occur. 3 Even if he or she were aware that his or her tires had been deflated intentionally 4 and that the police were in pursuit, an innocent motorist would assume that a mistake had been made, and that the mistake could be corrected through contact and communication with the police. Undoubtedly, if the police continued to exhibit signs of an intent to arrest after interacting with the motorist, the motorist reasonably might believe that an arrest was in progress. But the facts of this case simply do not reflect such a scenario, and we cannot say that an innocent motorist necessarily would have believed that the use of the spikes made an indefinite custodial detention inevitable.
We also are persuaded by the government’s justification for using the relatively more intrusive CTDD method to stop the vehicle. The facts known to Battaglini suggested a high likelihood of smuggling activity: the area is a known smuggling hotspot; Battaglini was at least “reasonably certain” that the vehicle had made an illegal border crossing; the vehicle had tinted windows and a tarp covering its posterior contents; it bore no marks of recreational use and proceeded hastily out of the dunes in a manner inconsistent with recreational activity; and it abruptly adjusted its speed from excessively fast in the recreational area to considerably below the speed limit on the highway. These facts led Battaglini to classify Appellants’ approach as a “confirmed illegal entry.” As Battaglini testified, vehicles exiting the A-7 and Buttercup Valleys under these particular circumstances rarely have yielded to the police and frequently have engaged in dangerous maneuvers that endanger innocent members of the public. Together, these “specific ... circum
Were we faced with an ordinary vehicle seizure unrelated to the “myriad difficulties facing customs and immigration officials who are charged with the enforcement of smuggling and immigration laws,”
Richards,
III. EXCESSIVE FORCE
While our determination that the use of force against Appellants’ vehicle failed to transform the stop into an arrest strongly suggests that the same use of force was not “excessive,” we provide a brief independent discussion of Appellants’ excessive force claim, which stems principally from their contention that spike strips are dangerous and inappropriate for use as a first resort. “An otherwise lawful seizure can violate the Fourth Amendment if it is executed in an unreasonable manner.”
U.S. v. Alverez-Tejeda,
A. Governmental interests
The government’s power at the border has an “impressive historical pedigree,”
Flores-Montano,
B. Extent and nature of the intrusion
Notwithstanding the strength of the government’s interests, the extent of the intrusion here should not be trivialized. In assessing the extent to which a particular vehicle stop intrudes upon Fourth Amendment expectations and rights, the Supreme Court has considered the “subjective intrusion” effected by a stop, namely, “the generating of concern or ... fright on the part of
lawful
travelers.”
Mich. Dept. of State Police v. Sitz,
Other considerations, however, point towards relatively minimal intrusiveness. First, while Appellants claim that the use of a spike strip without prior warning is “the vehicular equivalent of shooting a suspect in the leg without first saying, ‘Stop, police,’ ” the Supreme Court has rejected prior attempts to equate the application of force to vehicles with its application to persons.
See Scott,
Second, the record below amply supports the district court’s conclusion that the use of the CTDD was safe. Based on his deployment of the device on thirty to thirty-five occasions and his observation of its deployment by others on sixty to seven
To rebut the evidence of safety, Appellants focused in the district court on the contents of a training manual provided by the manufacturer of the Border Patrol’s spike strips. The manual indicates that the strips are designed to “stop[] high-speed pursuits” and are thus for pursuit termination only. Appellants have failed to explain, however, why the guidance in the training manual should determine whether the device may be used safely in other situations — particularly in situations where its use poses inherently less danger than in a high-speed pursuit. Appellants appear to contend that the prescriptions of the Training Manual should supersede police judgment as to the proper selection of the means to meet a threat, but the Supreme Court has explained that “the choice among ... reasonable alternatives remains with ... governmental officials.”
Sitz,
Appellants also offered the declaration of Jack Smith, a use-of-force expert, in connection with a motion inviting the district court to reconsider its denial of the motions to suppress. Smith stated that “the record of using[controlled tire deflation devices] is replete with death and/or serious injury to citizens as well as law enforcement officers,” and that “many” law enforcement agencies permit the use of such devices exclusively as a last-resort. These statements, however, were unsupported by any citation to specific facts or evidence. In addition, Smith’s resume failed to disclose any basis in experience or expertise for his opinion that the use of spikes “to seize a vehicle only suspected of smuggling illegal narcotics and/or aliens is not reasonable.” The district court found Smith’s declaration unconvincing. Particularly given our limited role in reviewing the district court’s findings of fact, we agree that the Smith declaration does not materially affect the assessment of wheth
C. Balancing
In light of the apparent safety of deploying the tire deflation device and the lesser degree of intrusiveness associated with the use of force against vehicles rather than persons, we conclude that the government’s strong interests in protecting the nation’s territorial integrity and interdicting the flow of drugs alone tip the Fourth Amendment balance in the government’s favor. There is, however, an additional and critically important reason why the government must prevail in this case. Battaglini “defends his actions by pointing to the paramount governmental interest in ensuring public safety, and [Appellants] nowhere suggest[] this was not the purpose motivating” Battaglini’s decision to deploy the spike strip.
Scott,
Appellants argue that principles underlying the knock-and-announce rule should be applied to the use of tire deflation devices to effect vehicle stops, and that such principles render the conduct at issue here unreasonable per se. The Supreme Court has articulated the principal virtues of the knock-and-announce rule as follows:
One of th[e] interests is the protection of human life and limb, because an unannounced entry may provoke violence in supposed self-defense by the surprised resident. Another interest is the protection of property.... The knock-and-announce rule gives individuals the opportunity to comply with the law and to avoid the destruction of property occasioned by a forcible entry. And thirdly, the knock-and-announce rule protects those elements of privacy and dignity that can be destroyed by a sudden entrance. It gives residents the opportunity to prepare themselves for the entry of the police.
Hudson,
IV. BRADY DISCLOSURES
Appellant Guzman argues that the district court’s refusal to compel the government to produce the Border Patrol’s written policy on the use of CTDDs violated his due process rights. A failure to disclose material exculpatory evidence constitutes a violation of due process under
Brady. See United States v. Bagley,
473
Brady
claims are reviewed
de novo
if they are raised in the district court.
United States v. Holler,
Second, even if Battaglini’s actions were inconsistent with Border Patrol policy, the policy would not have been material to the district court’s determination. While Guzman asserted vaguely that the Border Patrol’s failure to follow its own regulations would “say[] something about what happened here,” this theory of materiality is foreclosed by our case law. It is well-settled that the scope of the Fourth Amendment’s protections is not to be measured by reference to agency guidelines and other extra-constitutional matter.
See, e.g., Virginia v. Moore
, — U.S. —,
The stop of Appellants’ vehicle was a valid seizure incident to a border search, and it was conducted in a reasonable, nonexcessive manner. Guzman’s Brady rights were not violated. Accordingly, the judgment of the district court is
AFFIRMED.
Notes
. Appellants contend that the government waived the border search argument by failing to present it to the district court. While matters not presented to the trial court generally may not be raised for the first time on appeal,
United States v. Flores-Payon,
Here, while the government made no mention of border searches in the district court, it consistently has claimed that the seizure of Appellants’ vehicle did not require probable cause. The border search justification is merely an additional argument raised in support of that claim. Moreover, all of the factual predicates of a border search were fully litigated below. Accordingly, we may consider the government’s argument that the seizure falls within the border search rubric, and we must determine only whether the record supports the government’s legal position.
. Appellants also argue that the extended border search doctrine is inapplicable because the agents here were not “concerned with 'sweeping in' accomplices of the carrier of contraband.”
See United States v. Espericueta Reyes,
. Appellants contend only that the use of the CTDD rendered the stop a de facto arrest, not that other intrusive measures employed during the stop subsequently transformed it into an arrest.
. In the related case of United States v. Cota-Mora, which we also decide today, the Border Patrol agent testified that he had driven unintentionally over spike strips on several occasions, and that the experience was akin to traveling over a small “bump on the road.”
. It is undisputed that probable cause to conduct a full-scale search arose at the latest when the agents encountered the smell of unburned marijuana emanating from the vehicle.
See United States v. Garcia-Rodriguez,
. Appellants’ reliance on the facts of
Bublitz
v.
Cottey,
. In light of our conclusion that the seizure was reasonable, "[w]e ... have no occasion to consider whether exclusion of the evidence would have been an appropriate remedy.”
Alverez-Tejeda,
