Based on a tip, Houston police suspected that the defendant, Juan Angel Martinez, had witnessed a violent crime and might possess the weapons used therein. The tipster provided a street address and indicated that Martinez was staying there with his girlfriend. Rather than seek a warrant, the police set up a ruse to draw *858 Martinez out of the house. Martinez and his girlfriend took the bait, exited the home and drove off in a vehicle, unaware that they were being watched. Police officers stopped the vehicle a few blocks away, placed the defendant in the back of a police car, and then asked his girlfriend for consent to search her home, which she gave. Police discovered three firearms inside, but soon learned that the tipster was wrong. Martinez had not witnessed a violent crime, nor were the guns used in such a crime. Martinez was charged with being an illegal alien in possession of firearms, in violation of 18 U.S.C. §§ 922(g)(5)(A), 922(g)(1), and 924(a)(2).
Martinez filed a motion to suppress both the guns and any statements given to police. The district court decided to suppress the statements but not the guns. After a bench trial, Martinez was found guilty of being a felon in possession. On appeal, Martinez again argues that the guns must be suppressed. Specifically, he claims that the stop was not supported by reasonable suspicion, and that the guns must be suppressed as the fruit of that poisonous tree. We agree with Martinez.
I. FACTS AND PROCEDURAL HISTORY
Law enforcement in Houston received a tip that a man named “Angel” might have been a witness to a quadruple homicide, might be in possession of the weapons used in the homicide, and might be planning to flee to Mexico with those weapons. The tipster stated that Angel was staying with his girlfriend, and provided her address in Pasadena, Texas. The day after receiving the tip, the police did not seek a warrant. Rather, six officers set up surveillance outside the residence. Three or four hours later, a car drove away from the residence. The officers stopped the car and interviewed the driver, a man named Bernardo, who confirmed that a man named Angel was in the residence. At the request of the police, Bernardo agreed to call the residence and ask Angel to come to the location of the stop to retrieve his car. Approximately twenty minutes later, Juan Angel Martinez (“Martinez”) and his girlfriend, Georgina Amatt (“Amatt”), left the house, totally unaware that they were under surveillance. The police stopped them a few blocks away. They immediately placed Martinez in the back of a police cruiser, where he consented to being transported to the police station for questioning. Meanwhile, a Spanish-speaking officer obtained consent from Amatt to search her residence, which resulted in the discovery of three firearms.
The police quickly learned that Martinez’s middle name was Angel, but contrary to the tipster’s information, neither Martinez nor the discovered weapons had anything to do with the quadruple homicide. Martinez was charged only with being an illegal alien in possession of firearms and with being a felon in possession of firearms, in violation of 18 U.S.C. §§ 922(g)(5)(A), 922(g)(1), and 924(a)(2). He filed a motion to suppress the statements given and the evidence seized. The district court held a lengthy suppression hearing at which both sides presented the testimony of multiple witnesses. After-wards, the district court granted the motion to suppress the statements but denied the motion to suppress the evidence. The court later conducted a bench trial and found Martinez guilty of being a felon in possession. The district judge sentenced him to a term of 92 months plus three years supervised release.
On appeal, Martinez argues that the district court erred in denying his motion to suppress the weapons discovered at Am-att’s home. He argues that the informant’s tip was not itself reliable and spe- *859 eific enough to give rise to a reasonable suspicion that Martinez had engaged in criminal activity. He adds that the police might have established the reliability of the information by taking steps to corroborate it, but they did not adequately do so. Without reasonable suspicion, he says, the stop of his vehicle was unlawful, and the firearms must be suppressed as the fruit of that poisonous tree.
II. STANDARD OF REVIEW
As a preliminary matter, the parties disagree as to the appropriate standard of review to be applied in this case. Generally, when considering a motion to suppress evidence under the Fourth Amendment we review the district court’s factual findings for clear error and its Fourth Amendment conclusions
de novo. United States v. Gonzalez,
After a lengthy evidentiary hearing, defense counsel summarized his arguments to the district judge, one of which was as follows: “The reasonable suspicion itself wouldn’t be sufficient, because they didn’t have reasonable suspicion that Martinez had just committed a crime.” Martinez plainly asserted that the stop was not supported by reasonable suspicion because the police could not reasonably suspect that he had just committed a crime. This requirement comes from a long line of case law holding that “an investigatory stop would be proper only if based on reasonable suspicion that ‘criminal activity is afoot.’ ”
United States v. Roch,
On this record alone, it would seem obvious that our review of the Fourth Amendment claim, which was presented to and decided by the district court, would be de novo. However, the government argues that Martinez’s challenge to the reasonable suspicion was not specific enough to alert the court and the government to the particular concern he raises on appeal. In particular, the government says that Martinez did not argue in the district court that the informant’s tip was inadequate to give rise to a reasonable suspicion of criminal activity. If Martinez had specifically stated that the informant’s tip was unreliable, says the government, then it might have re-called its witnesses, or called new witnesses, to establish the reliability of its informant or its information. But this the government was already obligated to do.
The crucial fact in this case is that the government bore the burden of proving reasonable suspicion.
See Roch,
It is true that once the government had presented its evidence, Martinez still needed to make his specific legal arguments clear to the district court. If he failed to do so, we would review for plain error only.
See United States v. Maldonado,
This case is very different from
Maldonado.
As we have said, “the touchstone [of the
Maldonado
inquiry] is whether the objection was specific enough to allow the trial court to take testimony, receive argument, or otherwise explore the issue raised.”
United States v. Burton,
It is true that Martinez did not make the best case to the district judge for why reasonable suspicion was lacking. The relevant portion of his argument amounted to little more than a single sentence: “The reasonable suspicion itself wouldn’t be sufficient, because they didn’t have reason *861 able suspicion that Martinez had just committed a crime.” 4 However, Martinez plainly asserted his view that the stop was not supported by reasonable suspicion because the police did not have a reasonable belief that Martinez had committed a crime. The district court considered this argument, though without the benefit of helpful case law or rhetorical prowess, and ruled against Martinez. This is enough to preserve the issue for review in our court. On the record before us, we are well situated to review the district court’s Fourth Amendment conclusions de novo, and we now do so.
III. DISCUSSION
A The police did not have reasonable suspicion to justify an investigatory stop.
“An investigative vehicle stop is permissible under
Terry
only when the officer has a reasonable suspicion supported by articulable facts that criminal activity may be afoot.”
United States v. Jaquez,
the credibility and reliability of the informant, the specificity of the information contained in the tip or report, the extent to which the information in the tip or report can be verified by officers in the field, and whether the tip or report concerns active or recent activity, or has instead gone stale.
United States v. Gonzalez,
The first of these factors, the credibility and reliability of the informant, deserves particular scrutiny in this case. The government insists on characterizing the tipster as a “confidential informant,” but it never introduced any evidence about the informant whatsoever and made no effort to illustrate his or her reliability in the district court. In fact, the government elected not to call a single witness who had any first-hand knowledge of the tip or the informant. They knew only that the police department had received information “from another person” about a man named Angel. None of them testified, nor could they have, about the source of that information, the reliability of that source, or the *862 specifics of what he or she said. Thus there is no evidence in the record suggesting any basis for finding the informant credible, such as, for example, whether or not the informant had any past dealings with the police. For our purposes, then, the report is the functional equivalent of an anonymous tip. To characterize it as anything else would be to assume the very credibility and reliability that the government has the burden of proving.
Without establishing the reliability of the informant, the government had to establish reasonable suspicion based on some or all of the other factors listed above: the specificity of the information provided, the extent to which the information is corroborated by officers in the field, and whether that information concerns recent activity or has instead gone stale. At the time of this stop, the police had (1) a tip that a person named “Angel” was storing weapons that had been used in a crime in his girlfriend’s house; (2) corroboration by the individual leaving the specified house that a man named “Angel” was inside; and (3) visual verification that two people left the residence 20 minutes after a phone call was placed asking Angel to pick up his car, and that those two people drove toward the location where the pick-up was supposed to occur. Therefore, at the time of the stop, the only
verified
information that the police had was that a man named Angel was in a specified residence. Notably absent, however, is any verified information that “criminal activity may be afoot.”
Jaquez,
The Supreme Court has evinced a strong distrust of anonymous tips. In particular, it has stated that an anonymous tip that provides verifiable information as to a person’s identity and location, without more, is insufficient to justify an investigative stop. In
Florida v. J.L.,
The Court reasoned that in informant cases, the tip replaces the “ ‘unusual conduct which leads [the police officer] to reasonably conclude in the light of his experience that criminal activity may be afoot....’”
Id.
at 270,
The J.L. Court concluded that an anonymous informant’s ability to describe a person’s appearance and location is insufficient to create a reasonable suspicion of criminal activity. The Court explained:
An accurate description of a subject’s readily observable location and appearance is of course reliable in this limited sense: It will help the police correctly identify the person whom the tipster means to accuse. Such a tip, however, does not show that the tipster has knowledge of concealed criminal activity. The reasonable suspicion here at issue requires that a tip be reliable in its assertion of illegality, not just in its tendency to identify a determinate person.
Id.
at 272,
We find further support for this conclusion in our own precedent, even without classifying the tip as anonymous. In
United States v. Roch,
We reversed. We noted that the police officers “did not observe any activity during the surveillance which would support a finding of reasonable suspicion that Roch was a felon in possession of a firearm.” Id. at 897. The police did not observe or *864 uncover any facts that would corroborate Roch’s status as a felon, nor did they observe him carrying or attempting to conceal a gun. Id. We continued:
In fact, the surveillance failed to provide reasonable suspicion of any crime. The agents did not see Roch commit a criminal offense, engage in any questionable behavior, or break any traffic laws. The only activity the agents observed was a man and woman leaving the motel parking lot in a white and orange pickup truck and driving to a filling station.
Id. at 897-98. The parallels to the instant case are striking. We could go on to quote Roch at some length, but suffice it to say that it leads to the conclusion that we have already foreshadowed, that absent any corroboration of the illegal activity itself, “the government had no reasonable suspicion that the criminal activity suggested by the informant was afoot.” Id. at 899.
There is no relevant difference between Roch and the instant case that would suggest a contrary result. In fact, the one major difference between the two only bolsters our conclusion today. Unlike in the present case, the government actually did argue that the informant in Roch had “previously given reliable information that had resulted in warrants and convictions,” and that the information “was based on direct contact with the suspect.” Id. Nevertheless, we characterized the tip as “significantly less detailed than other situations where reasonable suspicion has been found.” Id. In particular, we were troubled by the fact that the information did not include the suspect’s last name, any description of his height and weight, or the make and model of the truck. Id. As we have taken pains to point out, in the present case the government did not even attempt to show any reliability on the part of the informant himself.
In virtually every respect then, our precedent in Roch compels our decision today, and we find still greater support in Florida v. J.L. Both cases lead inevitably to the conclusion that the police in this case did not have reasonable suspicion to perform an investigative stop of Mr. Martinez. The Government provides no compelling authority to the contrary, but seems to rely heavily on the rhetorical point that the police corroborated “everything that they could corroborate.” Even if this were true, it is not a legal standard of any kind, and carries no weight in this court. That the police might corroborate a mountain of innocent data, such as a person’s identification and whereabouts, does not provide any basis for executing a Terry stop on that person. If it did, then Terry itself would be a dead letter. Only when the police have a reasonable basis to suspect criminal activity can they justifiably conduct an investigative stop. In this case there was none.
B. The evidence seized was a “fruit” of the constitutional violation, and must be suppressed.
Under the fruit-of-the-poisonous tree doctrine, “all evidence derived from the exploitation of an illegal search or seizure must be suppressed, unless the Government shows that there was a break in the chain of events sufficient to refute the inference that the evidence was a product of a Fourth Amendment violation.”
United States v. Rivas,
Even though the officers executed an unjustified
Terry
stop, “a subsequent consent to search may, but does not necessarily, dissipate the taint of a prior fourth amendment violation.”
United States v. Jones,
“To determine whether the causal chain was broken, we consider: (1) the temporal proximity of the illegal conduct and the consent; (2) the presence of intervening circumstances; and (3) the purpose and flagrancy of the initial misconduct.”
Chavez-Villarreal,
As we have shown, all signs indicate that there was not a break in the causal chain between the illegal stop and the subsequent discovery of the evidence in Amatt’s home. Accordingly, that evidence must be suppressed, and the conviction and sentence vacated.
C. The constitutionality of 18 U.S.C. § 922(g)(1)
Martinez also argues that 18 U.S.C. § 922(g)(1) is unconstitutional on its face and as applied to him. He concedes, however, that this argument is foreclosed by several prior decisions of this court.
E.g.,
*866
United States v. Guidry,
IV. CONCLUSION
For the foregoing reasons, we REVERSE the district court’s denial of the motion to suppress the evidence seized, VACATE Martinez’s conviction and sentence, and REMAND for further proceedings consistent with this opinion.
See United States v. Marshall,
Notes
. The district judge went on to say, "I credit the officers’ testimony as to the information that they had been given and the basis on which they made the traffic stops.” Later, when the court was considering whether or not to suppress the statements, it again observed that the officers had a "reasonable suspicion of criminal activity that would have justified the steps they took to stop the vehicle in the way and in the manner that they did.”
. Unfortunately for the government, none of its witnesses could speak to the reliability of the informant or the information, because none had first-hand knowledge (or really any knowledge, for that matter) of either one. As we discuss in greater detail below, the record is devoid of any indication whatsoever of the identity or reliability of the informant.
. In
Minnesota v. Dickerson,
. At oral argument, the government endeavored to make an additional argument not raised in its brief, that Martinez actually conceded. the reliability of the informant’s tip in his closing arguments at suppression, when he stated:
The reasonable suspicion itself wouldn’t be sufficient, because they didn’t have reasonable suspicion that Martinez had just committed a crime. They had reasonable suspicion perhaps with respect to other material, other items that they, as they both testified, knew about the day before. They had been debriefed the day before on a confidential informant’s information on a man named Angel living in the house possibly possessing those guns. No search warrant was obtained, you had all of that time period, and instead this pretextual stop without an actual traffic violation was the manner used to get him into what was effectively custody,
(emphasis added). Putting aside the fact that the government did not brief this argument, we still do not find it persuasive. It is possible to infer from the italicized language that defense counsel was not challenging the reliability of the informant. However, there are several plausible inferences from this statement, and in view of the fact that defense counsel consciously used the word “perhaps,” we are reluctant to read his statement as a concession of anything, particularly when it is in the context of a larger argument challenging the stop as unsupported by reasonable suspicion.
. It bears repeating that the police did not have to corroborate this information in the field, provided they had some other basis for believing its truth. In most cases this basis is the informant, whose reliability is established either by his or her past dealings with police, or by the specifics of the information that he or she provides. In the present case, however, the police had neither, which made the need to corroborate the little information they did have paramount.
. We note that the tipster did state that he expected Angel to leave for Mexico with the guns. This is a predictive statement about future behavior, to be sure, but it was not verified in any way and thus could not contribute to any reasonable suspicion. In fact, Martinez's actions do not indicate any effort to flee for Mexico or anywhere else.
