This case requires us to apply
United States v. Zamudio-Carrillo,
On direct appeal, Rodriguez argues that his traffic stop violated the Fourth Amendment because it was not supported by reasonable suspicion. 1 He also argues that his investigative detention amounted to an illegal arrest because it exceeded the scope of any arguably permissible stop, and officers lacked probable cause to believe he had violated the law. We disagree with both of these contentions. On our review of the record, law enforcement had probable cause to support both a traffic stop and an arrest.
We hold that the officer who stopped the brown pickup had a sufficient basis to conclude that Rodriguez and the driver of the pickup were traveling together. Accordingly, when the officer discovered that the truck was carrying marijuana, probable cause to arrest Rodriguez arose. Thus, the initial stop was permissible and Rodriguez’s constitutional rights were not violated even if his detention were an arrest. For these reasons, we affirm the denial of Rodriguez’s motion to suppress and uphold the conviction.
I
We amplify the foregoing summary of the facts in order to establish the context of the defendant’s claims. At a hearing on the defendant’s motion to suppress, Santa Clara Police Officer Michael Marquez testified that, around 4:80 a.m., he saw a brown Dodge pickup truck driving two car lengths behind a red Nissan Sentra. As officers later learned, Rodriguez was driving the red Nissan, and his codefendant, Hiram Gallardo-De La Cruz (“Gallardo”), was driving the brown pickup. Both vehicles had California license plates and were traveling five miles per hour below the speed limit. Officer Marquez observed that the brown pickup truck was canted toward the rear, and chose to follow the two vehicles. All three vehicles were traveling in the right lane, but, according to Officer Marquez, Rodriguez repeatedly veered into the left lane, “t[ook] a look” at Marquez’s vehicle, then returned to the right lane. Marquez saw that the brown pickup truck lacked a light above its license plate, in violation of New Mexico state law. See N.M. Stat. Ann. § 66-3-805(c). At this point, he proceeded to stop the truck. When he did so, Officer Marquez testified, he saw Rodriguez’s car “sit down,” indicating that the driver was accelerating swiftly. Gallardo delayed in stopping, affording the Nissan adequate opportunity to continue out of sight. By radio, Marquez promptly requested a stop of the red vehicle for a “welfare check.”
When Officer Marquez requested a driver’s license and registration, Gallardo refused to identify himself or to provide a license. As they spoke, Marquez noticed an odor of fresh marijuana and saw a bundle inside the cab of the truck on the rear seat. Marquez obtained consent to search the bed of the truck and saw approximately ten more bundles matching *1226 the one in the cab. While Officer Marquez called the Grant County Sheriffs Department for backup, Gallardo escaped on foot.
Grant County Sheriffs Deputy Adam Arellano responded to Officer Marquez’s call for assistance. Marquez told him that a red vehicle with tinted windows and a California license plate had been driving erratically and traveling with the brown pickup. Arellano issued what became the second alert to locate and stop the red vehicle, using a police code for suspected narcotics trafficking. Shortly thereafter, Sheriffs Deputy Anthony Bencomo responded to Arellano’s alert and notified Arellano that he stopped the red Nissan approximately six miles from where Marquez had stopped the brown pickup.
Deputy Arellano immediately drove to the scene of the Nissan’s stop. Upon arrival, he obtained Rodriguez’s permission to search the vehicle. Arellano handcuffed Rodriguez, notified him that he was not under arrest, and placed him in the rear of Bencomo’s patrol vehicle while he searched Rodriguez’s car. The search yielded no evidence of contraband, but there was evidence discovered linking Rodriguez to the driver of the brown truck. Rodriguez later admitted that he and Gallardo were working together to transport marijuana to California.
Before trial, Rodriguez moved to suppress all evidence obtained as a result of his stop, evidence which he alleged was unsupported by reasonable suspicion or, alternately, was beyond the scope of any such suspicion. The district court denied this motion and found the stop to be supported by reasonable suspicion and reasonable in scope. Rodriguez proceeded to trial and was convicted by a jury of both counts charged. He now appeals.
il
A
Rodriguez argues that the district court erred in denying his suppression motion because all evidence obtained against him resulted from a traffic stop that lacked reasonable suspicion at its outset, in violation of the Fourth Amendment. In reviewing a denial of a motion to suppress, we view the evidence in the light most favorable to the government, accepting the district court’s factual findings unless clearly erroneous.
United States v. Katoa,
The Fourth Amendment protects “[t]he right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures.” U.S. Const, amend. IV. It is well established that an automobile stop constitutes a seizure for purposes of the Fourth Amendment,
Delaware v. Prouse,
Rodriguez also challenges the scope of his traffic stop, claiming that it became an arrest when he was handcuffed and placed in Deputy Bencomo’s vehicle.
2
*1227
As a matter of law, Rodriguez is correct that “[i]f a police-citizen encounter exceeds the limits of a
Terry
stop, the detention becomes an arrest that must be supported by probable cause.”
United States v. Neff,
We need not determine whether Rodriguez’s investigative detention amounted to an arrest if probable cause existed, because in such circumstances, an arrest would not violate the Fourth Amendment.
3
See, e.g., Latta v. Keryte,
B
When law enforcement officials rely on a bulletin or alert to conduct a stop or make an arrest, the relevant inquiry is whether the officer who issued the alert— rather than the officer who conducted the challenged action — had the requisite level of suspicion.
United States v. Hensley,
This minor factual variation need not alter our analysis. In
Hensley,
the Supreme Court reasoned that officers must be permitted to promptly rely on their colleagues from other law enforcement agencies without resorting to cross-examination to apprehend increasingly mobile suspects.
Sufficient evidence that two vehicles are driving in tandem plus evidence that one vehicle contains contraband can provide probable cause sufficient to support arresting the driver of the other vehicle.
Compare Zamudio-Carrillo,
In making this determination, we consider first
Zamudio-Carrillo,
a case in which two vehicles with consecutively numbered Arizona specialty license plates drove a quarter mile apart along a Kansas interstate highway.
We consider also
Valenzuela,
a case in which two vehicles traveled some distance apart on a crowded highway.
*1229
Although no single fact in the present case is as compelling as the sequential specialty plates in
Zamudio-Carrillo,
there is nonetheless considerable objective evidence that the brown pickup and red Nissan were driving in tandem. Officer Marquez testified that the two vehicles traveled a mere two car lengths apart on a highway in very light traffic during the predawn hours of the morning, and as they did so, Rodriguez repeatedly swerved to better observe Officer Marquez’s vehicle as it traveled behind the truck. Moreover, Rodriguez abruptly sped off when Marquez stopped the pickup, and the pickup seemingly waited for Rodriguez’s vehicle to elude Marquez’s range of vision before pulling over. The facts supporting probable cause in this case are unquestionably stronger than the facts this court deemed insufficient in
Valenzuela
in which two vehicles traveled some distance apart on a crowded highway.
Although this is a highly factual inquiry and all facts present are necessary to our conclusion, Marquez had sufficient evidence to conclude that Rodriguez and Gal-lardo were traveling in tandem. Unlike in Zamudio-Carrillo, when Deputy Arellano issued the alert that led to Rodriguez being stopped, he and Officer Marquez already knew that the pickup truck contained a large quantity of marijuana; thus, they unquestionably had probable cause to believe that Gallardo had committed a crime. Accordingly, we hold that the evidence of tandem driving in the present case created probable cause that Rodriguez was committing a crime as well. 6 This probable cause was sufficient to support his traffic stop and any subsequent arrest.
III
AFFIRMED.
Notes
. Although Rodriguez does not explicitly argue a violation of the Fourteenth Amendment, the Fourth Amendment applies against state law enforcement officials as incorporated through the Due Process Clause of the Fourteenth Amendment.
Mapp
v.
Ohio,
. We disagree with the government that Rodriguez waived this argument by failing to *1227 raise it below as part of his motion to suppress. To the contrary, Rodriguez challenged the scope of the traffic stop in his suppression motion and thus preserved the illegal arrest issue.
. Although the government has not argued on appeal that law enforcement officials had probable cause to arrest Rodriguez, "[t]his court is not limited to the particular legal theories advanced by the parties, but rather retains the independent power to identify and apply the proper construction of governing law.”
United States v. Lott,
. The district court denied Rodriguez's motion to suppress because it found that Rodriguez's detention was reasonably related in scope to the circumstances justifying the initial traffic stop. Yet, we need not resolve the case on that basis and may affirm the district court’s ruling on alternative grounds.
Lott,
. We note that this case does not involve a “horizontal” collective knowledge relationship in which the knowledge of several officers must be aggregated to create probable cause. Rather, it is a case of two "vertical” collective knowledge relationships in which the first officer's conclusion was conveyed twice to reach the officer who conducted the stop.
See Chavez,
. Because we hold that Officer Marquez had probable cause to stop Rodriguez's car based on narcotics trafficking, upon which Deputies Arellano and Bencomo relied, we need not consider the district court’s determination that Rodriguez's erratic driving independently created reasonable suspicion supporting a stop.
