Filimon Garcia-Beltran appeals from a judgment of conviction following a conditional plea of guilty to illegally reentering the United States, in violation of 8 U.S.C. § 1326(a) and (b)(2). Prior to his guilty plea, Garcia-Beltran moved to suppress all evidence gathered as a result of his illegal arrest, including “identity evidence,” which he described as fingerprints, statements and photographs. Although Garcia-Bel-tran sought to suppress all identity evidence, his motion principally focused on the fingerprint exemplars that were taken from him shortly after his arrest. In opposing the motion, the government conceded that the police did not have probable cause to arrest Garcia-Beltran, but argufed that evidence of identity did not implicate the Fourth Amendment and therefore was not subject to suppression. The district court agreed and denied the motion. As permitted by his conditional plea agrefement, Garcia-Beltran appeals this ruling.
I.
We hold that the district court erred to the extent it failed to consider the fingerprint evidence separately. We remand for an evidentiary hearing so that the district court may make factual findings regarding the fingerprinting of Garcia-Beltran. As we explain, if on remand the court determines that the fingerprints were taken for an “investigatory” purpose, ie. to connect Garcia-Beltran to alleged criminal activity, then the fingerprint exemplars should be suppressed. Accordingly, we vacate the judgment and remand for further proceedings.
In light of the government’s concession that Garcia-Beltran was arrested without probable cause, the district court did not conduct an evidentiary hearing or make findings of fact regarding the events leading up to his arrest and subsequent detention. From-the parties’ submissions and arguments before the district court we are able to ascertain the following events that formed the basis for Garcia-Beltran’s motion to suppress:
Garcia-Beltran was in the area of Burnside Street in Portland, Oregon on August 14, 2001 getting ready to board the Metro light rail. Officer Hubbard of the Portland Police Department’s Central Precinct took Garcia-Beltran into custody. Although he did not recall the circumstances surrounding Garcia-Beltran’s arrest, Officer Hubbard told a defense investigator that Garcia-Beltran was most likely arrested in the context of an “INS sweep.” He also stated it was possible that he had an INS agent with him on the day he arrested Garcia-Beltran. Garcia-Beltran was turned over to the United States Marshal’s Service on the same day he was taken into custody. There is no other evidence in the record that describes the circumstances of Garcia-Beltran’s arrest.
Further, the record does not reflect when and which agency obtained Garcia-Beltran’s fingerprints. 1 Thus, we are unable to determine the original purpose for fingerprinting Garcia-Beltran, ie., was it *866 solely to establish Garcia-Beltran’s true identity, or was it an attempt to connect Garcia-Beltran to alleged illegal activity? Because the district court considered Garcia-Beltran’s fingerprint exemplars as evidence of his identity, without regard to the government’s purpose in obtaining them, it did not attempt to resolve these factual issues. 2
II.
Garcia-Beltran argues that his fingerprints should be suppressed in accordance with the Supreme Court’s precedents in
Davis v. Mississippi,
The government responds that it solely seeks to use the fingerprint evidence to establish Garcia-Beltran’s identity, and that
Hayes
and
Davis
are therefore inapplicable. Rather, the government argues, under
INS v. Lopez-Mendoza,
The government is correct that in
Lopez-Mendoza,
the Court, in rejecting an alien’s attempt to suppress his compelled appearance at a deportation hearing, held that “[t]he ‘body’ or identity of a defendant or respondent in a criminal or civil proceeding is never itself suppressible as a fruit of an unlawful arrest even if it is conceded that an unlawful arrest, search or interrogation occurred.”
Garcia-Beltran, however, did not seek to suppress the fact of his identity or “body”; he recognized that he could lawfully be compelled to appear in court. Rather, he *867 sought to exclude all evidence obtained from him as a result of his illegal arrest, including evidence that would tend to establish his true identity, such as fingerprints, photographs and oral statements. Contrary to the government’s argument, Lopez-Mendoza does not preclude suppression of evidence unlawfully obtained from a suspect that may in a criminal investigation establish the identity of the suspect.
In Pargar-Rosas, which involved a prosecution under § 1326, we briefly addressed the defendant’s argument that the district court should have suppressed his fingerprint exemplars, taken five months after his illegal arrest. In rejecting Parga-Ro-sas’ argument, we stated that fingerprints taken solely for identification purposes (i.e., to verify that the person who is fingerprinted is really who he says he is) can be admitted, because evidence of “identity” is never suppressible under Lopez-Mendoza. We left open the possibility, however, that fingerprints taken for an “investigatory” purpose should be suppressed. Notably, as the facts of Parga-Rosas reveal, the fingerprint exemplars at issue in that case were not tainted by the alleged illegal arrest.
In
Parga-Rosas,
INS agents questioned Parga-Rosas about his alienage and immigration history without advising him of his
Miranda
rights.
Five months later, after Parga-Rosas was indicted under § 1326, a second set of fingerprints were taken which were matched with a Warrant of Deportation in his INS “A” file. We upheld the admission of the
second
fingerprint exemplars. As we explained: “Because the fingerprints were not taken for investigatory purposes but for the sole purpose of proving Parga-Rosas’ identity, the Fourth Amendment is not implicated.”
Id.
at 1215 (citing
Guzman-Bruno,
On the other hand, if the district court finds on remand that the intent at the time of taking Garcia-Beltran’s fingerprints was solely for investigative purposes, then it is likely that
Hayes
and
Davis
control and the fingerprints must be excluded. In
Davis,
police investigating a rape had only a description of the assailant as an African American youth. Over a period of ten
*868
days, the police seized, without warrants, at least 24 African American youths and took them to the police station, where they were questioned, fingerprinted and released.
The Court rejected the argument that fingerprint evidence was not subject to the exclusionary rule, holding that the fingerprints were “something of evidentiary value which the public authorities have caused an arrested person to yield to them during illegal detention.”
Id.
at 724,
Here, the ultimate question that the district court must answer on the basis of a more complete evidentiary record is: were Garcia-Beltran’s fingerprints taken for an investigatory, or identification, purpose (or both)? We recognize that in the investigation of immigration offenses, establishing the identity of the suspect is an essential component of such an investigation. Yet, the need to establish identity does not mean that any evidence that leads to the true identity of the suspect is automatically exempt from the exclusionary rule. We emphasized this point in our recent opinion in
Del Toro Gudino
where we stated, “We continue to hold today that the simple fact of who a defendant is cannot be excluded, regardless of the nature of the violation leading to his identity. Other evidence, of course, may be suppressed consistent with
Gonzalez-Rivera [v. INS,
Although we do not know the factual circumstances of Garcia-Beltran’s arrest and subsequent detention, the government has conceded that there was not probable cause for his arrest. In Guevara-Martinez, the defendant sought to suppress his fingerprints that were obtained following his illegal arrest and were used to establish a violation of § 1326. The Eighth Circuit’s analysis of the defendant’s Fourth Amendment challenge to the fingerprints provides helpful guidance in determining whether fingerprint exemplars obtained following an illegal arrest should be suppressed. As the Eighth Circuit concluded:
[W]e find it significant that the fingerprinting occurred only after the INS had interviewed Guevara-Martinez. The government has offered no evidence that the fingerprints were obtained as a matter of course through routine booking procedures, rather than for the purpose of assisting the INS investigation. The absence of evidence that the fingerprinting resulted from routine booking, and the concomitant inference that an INS-related purpose motivated the finger *869 printing, also counsel in favor of applying the exclusionary rule.
Id. at 756 (citations omitted).
Here, the government has conceded that Garcia-Beltran was taken into custody without any probable cause to believe he committed a criminal offense. However, because the factual record is incomplete we cannot determine whether the district court should have suppressed Gareia-Bel-tran’s fingerprint exemplars. Accordingly, we vacate the order denying Garcia-Bel-tran’s motion to suppress and remand for an evidentiary hearing so that the district court may make appropriate factual findings. If the district court grants the motion, it should permit Garcia-Beltran to withdraw his guilty plea and to proceed accordingly.
VACATED AND REMANDED.
Notes
. At oral argument, the government suggested that Garcia-Beltran may have been fingerprinted by the INS. However, the government was not entirely confident in this assertion.
. We review
de novo
the district court’s ruling on a motion to suppress evidence.
See United States v. Vargas-Castillo,
. In his challenge to the district court's ruling, Garcia-Beltran focuses on the fingerprint evidence. He does not separately address his oral statements or the photographs. We note, however, that in response to the motion to suppress, the government represented that it did not intend to use any statements obtained from Garcia-Beltran at the time he was taken into custody. We further note that with respect to the photographs, Garcia-Beltran’s motion expressed some uncertainty whether photographs even existed. We leave it to the district court to determine whether any photographs were taken of Garcia-Beltran, and, if so, whether they should be suppressed in light of our disposition.
. Likewise, Guzman-Bruno did not directly address the problem of fingerprints taken for an investigative purpose in the context of potential criminal violations of immigration law. As noted, in Guzman-Bruno, we rejected the defendant's attempt to suppress his identity as the fruit of an illegal arrest. Guzman-Bruno, however, did not involve fingerprint evidence and the need to classify it as either investigatory or identification evidence (and thus Hayes and Davis were not implicated).
. In
Del Toro Gudino
we held: "a defendant's identity obtained as a result of an egregious constitutional violation” may not be suppressed.
