George Paul Wolf III drove a stolen van from Coronado, California, to Ensenada, Mexico, where he was arrested by Mexican authorities. He was convicted of violating both 18 U.S.C. § 2312 1 for transporting in foreign commerce a motor vehicle known to be stolen and 18 U.S.C. § 2313 2 for possessing a stolen vehicle which had crossed a United States boundary. The district court imposed a five-year sentence for the transportation offense and a separate sentence of five years’ probation for the pos *972 session offense, the sentences to run consecutively.
Wolf raises three arguments on appeal: (1) the admission into evidence of a confession made to Mexican authorities violated the due process and self-incrimination clauses of the Fifth Amendment because it was the product of coercion; (2) the prosecutor knowingly relied on perjured testimony in violation of the due process clause; and (3) the imposition of separate sentences for transporting in foreign commerce and possessing the same motor vehicle violated the double jeopardy clause of the Fifth Amendment.
I
THE INVOLUNTARY CONFESSION ISSUE
On September 20, 1985, Wolf was stopped while in possession of a stolen van in Ensenada, Mexico, by an officer of the Mexican Federal Highway Patrol. Commandante Raul Vasquez-Miranda (Vasquez) was summoned to question Wolf about his activities. Wolf explained to Vasquez that his friend Johnson had loaned him the van and that he was going to Ensenada to see a friend named Chico. When Wolf could not provide Johnson’s address, Vasquez decided to take Wolf tо Vasquez’ office for further questioning. Vasquez consulted the California Highway Patrol and learned that the van had been reported stolen. Armed with this knowledge, Vasquez confronted Wolf, accused him of lying, and demanded that he tell Vasquez the truth. Wolf then confessed that he had stolen the van three days earlier and that he was driving to Ensenada to deliver the van to Chico.
Wolf contends on appeal that the government’s use of his confession as evidence during the trial violated his due process rights because his confession was coerced. 3 The crux of Wolf’s coercion argument is that Vasquez threatened him with physical violence unless he confessed. 4 It is undisputed that, during the questioning, Vasquez told Wolf to “[t]ell me the truth and *973 maybe I’ll help you.” Reporter’s Transcript of Jury Trial (“R.T.”) at 48. Wolf argues that the kind of “help” Vasquez promised was to protect him from being beaten, either by Vasquez himself or by other Mexican officers.
Wolf cites the following testimony as proof that he was verbally threatened by Vasquez during interrogation: 5
CROSS-EXAMINATION OF VASQUEZ BY WOLF
Q. And you say that if I wоuld talk to you, you could help me; is that correct? A. Yes.
Q. Now, could you elaborate on that a little bit? Could you tell the Court what it was that you said to me to get me to talk? Did you say you would let me go if I would talk and avoid hitting me like that?
A. It is true, that’s what I told you.
Q. Very well. I argue that the statement was involuntary and was based upon violated plea bargaining. He has admitted it right in court. 6
******
REDIRECT EXAMINATION OF VASQUEZ BY GOVERNMENT COUNSEL
Q. Commander Vasquez, did you ever threaten to hit the defendant if he didn’t talk to you?
A. No.
Q. What did you promise him if he told you the truth, if anything?
A. To help him in the report, with the purpose of other authоrities would not beat him. That’s all I promised him. I could not release him. I could not release him. The vehicle had already been reported stolen. I had to comply. 7
******
RECROSS OF VASQUEZ BY WOLF
Q. Now, you say that if I told the truth, I would not be beaten by other policeman, the state judicial police force, specifically?
A. Maybe.
Q. [I]s it or is it not true that you asked me if I would just tell you who I am selling the vehicles to, you would let me go?
A. No, not release you, but I was going to help you, but I never said what kind of help. 8
Wolf contends that this colloquy proves that when Vasquez offered to “help” Wolf if he talked, Vasquez meant that he would protect Wolf from being beaten by Mexican police.
Wolf also argues that other circumstances surrounding his confession support his claim of coercion. First, he maintains that even subtle threats by Mexican officers justifiably evoke great fear due to frequently published accounts of torture of American prisoners by Mexican authorities. Second, he points out that he was isolated from his family and friends and was not informed of any right against self-incrimination or any right to consult an attorney. 9 Third, he notes that he initially refused to talk and his confession immediately followed the alleged threats. Finally, he points out that his confession was in fact not entirely accurate 10 and argues that the inaccuracy suggests that he did not confess out of a desire to “come clean” but rather that he was coerced into giving some sort of inculpatory statement to avoid being beaten.
The government takes issue with Wolf’s characterization of Vasquez’ testimоny, contending that when Vasquez’ statements are viewed in context, it is unreasonable to *974 interpret his vague promise of “help” as implying that he would protect Wolf from being beaten if Wolf talked. The government suggests rather that Vasquez simply promised Wolf “[t]o help him in the report.” 11 While admittedly Vasquez testified at the suppression hearing that his purpose in offering Wolf help was to make sure “other authorities would not beat him,” 12 the government contends that Vasquez never communicated this purpose to Wolf during the interrоgation. Rather, Vasquez’ purpose in helping Wolf was disclosed solely to the judge presiding over the suppression hearing. In support of this interpretation of the transcript, the government emphasizes that Vasquez clearly testified that during the interrogation he “never said what kind of help” he would provide Wolf. 13 The government suggests that any other ambiguous statements supporting an inference that Vasquez threatened Wolf were the product of language difficulties (Vasquez’ examination was conducted through a Sрanish interpreter) and Wolf’s use of compound and leading questions during cross-examination. Finally, the government also points out that Wolf told FBI agent Ryan three weeks later “he was treated by [the Mexican highway patrol] fairly” and that Wolf did not complain to Ryan of being beaten or threatened. 14
Due process does not bar the use of a confession as evidence unless government officials employed coercive interrogation tactics which rendered the defendant’s confession “involuntаry” as a matter of law. In
Colorado v. Connelly,
— U.S. -,
[w]hile each confession case has turned on its own set of factors justifying the conclusion that police conduct was oppressive, all have contained a substantial element of coercive police conduct. Absent police conduct causally related to the confession, there is simply no basis for concluding that any state actor has deprived a criminal defendant of due process of law.
Id.
at 520;
see also Miller v. Fenton,
In determining whether the tаctics used by the Mexican police were coercive to the point of violating Wolf’s due process rights, we review the district court’s factual account of what happened during Wolf’s interrogation under the clearly erroneous test.
See United States v. McConney,
After hearing and assessing the credibility of the witnesses testifying at the suppression hearing, the district court denied Wolfs motion to suppress his confession to Vasquez. The court declared that:
As far as I’m concerned there’s no evidence to indicate that the confession or statement ... was made involuntarily. As a matter of fact, everything points to the fact that it was voluntary, and even to the fact that Mr. Wolf has explained to Mr. Ryan ... at the time he was free, that he was treated fairly by Mexican authorities. 15
Whether Vasquez in fact ever verbally threatened Wolf during interrogation is a question of historical fact, and we interpret the district court’s finding on voluntariness as accepting the government’s contention that Vasquez never threatened Wolf. Deference to the district court’s factual finding is especially warranted here when the critical evidence is testimonial; the “judge was in the unique position to observe the demeanor of both [the defendant] and the police officers while we have only the cold record, which is sterile by comparison.”
United States v. Hood,
Once stripped of the claim that he was threatened, Wolf’s argument that his confession was coerced is meritless. There was nothing exceptional about the duration or location of the questioning, and it certainly is not unusual for a suspect to have no family or friends present. The fact that Vasquez accused Wolf of lying does not automatically render the questioning coercive, as an interrogator can legitimately express his disbelief at a defendant’s story in order to elicit further comments or explanations. Moreover, we have previously rejected the notion that the fact that a susрect interrogated by foreign police received no
Miranda
warnings, without more, dictates the conclusion that a confession was coerced.
See Chavarria,
*976 II
THE KNOWING USE OF PERJURED TESTIMONY ISSUE
Wolf next argues that Commandante Vasquez lied during his trial testimony when he denied having threatened Wolf in order to secure a confession. 17 He asserts that the prosecution clearly knew Vasquez lied because Vasquez had admitted just the day before at the suppression hearing that he had indeed threatened Wolf. Wolf claims that the government’s knowing use of perjury violated his right to due process. 18
Wolf’s argument assumes that Vasquez did indeed threaten Wolf during the interrogation and that he had unequivocably admitted as much during the suppression hearing. 19 This assumption is belied by the district court’s implicit finding of fact that Wolf was not threatened by the Mexican authorities. See ante at 973. Wolf’s claim that Vasquez was clearly lying when he denied at trial that he had threatened Wolf is therefore unpersuasive.
Indeed, the most Wolf can fairly claim is that Vasquez’ testimony at trial was inconsistent with his testimony at the suppression hearing. Assuming arguendo that the testimony was somewhat inconsistent, 20 Wolf had a fair opportunity to exploit the inconsistency during his cross-examina *977 tion. His failure to do so cannot somehow render the prosecution guilty of depriving him of his due process rights by misleading the jury in a way that was fundamentally unfair.
Ill
THE DOUBLE JEOPARDY ISSUE
Wolf’s final argument is that the double jeopardy clause of the Fifth Amendment, which “protects against multiple punishments for the same offense,”
North Carolina v. Pearce,
Relying upon
United States v. Sanford,
We recently embraced the reasoning underlying
Sanford
in
United States v. Palafox,
The Supreme Court employed similar reasoning in
Ball v. United States,
In all three cases, the proof of possession was limited to a momentary period of time necessary to commit an additional statutory offense, whether transfer of counterfeit notes (Sanford), distribution of herоin
{Palafox),
or receiving a firearm
{Ball).
In contrast, when the proof of possession was not limited to the same time and place that the additional offense was committed, we have held that separate punishment for possession and the other offense is permissible. For example, in
United States v. Rodriguez-Ramirez, 111
F.2d 454 (9th Cir.
*978
1985), a defendant gave heroin samples to an undercover agent and retained possession of the remainder of his stash for two days before he was arrested. We held that “[b]ecause the distribution of the sample and the possession of the remаinder did not occur ‘at the same time, in the same place, and with the involvement of the same participants,’ ... separate convictions and punishments for these two violations are appropriate.”
Id.
at 457-58 (quoting
Palafox,
We believe that this case is controlled by
Rodriguez-Ramirez
rather than by
Sanford, Palafox,
or
Ball
because proof of Wolf’s possession was not limited to the time and place necessary to commit the act of transporting the stolen van in foreign commerce. Although Wolf asserts that “[n]o possession or treatment of the vehicle other than that which was necessary to trаnsport it has been charged or proved,”
Appellant’s Reply Brief,
at 6, the fact is that over three days elapsed between the time the van was stolen in Coronado and the time Wolf was apprehended in Ensenada. Because the driving time from Coronado to Ensenada is only a couple of hours or so, Wolf’s illegal possession of the van extended well beyond the time necessary to complete the offense of transporting the van in foreign commerce. Thus
Rodriguez-Ramirez
dictates that “separate convictions and рunishments for these two violations are appropriate.”
The judgment of the district court is
AFFIRMED.
Notes
. Section 2312 (“Transportation of Stolen Vehicles") provides that:
[wjhoever transports in interstate or foreign commerce a motor vehicle or aircraft, knowing the same to have been stolen, shall be fined not more than $5,000 or imprisoned not more than five years, or both.
. Section 2313 ("Sale or Receipt of Stolen Vehicles”) provides that:
[w]hoever receives, possesses, conceals, stores, barters, sells, or disposes оf any motor vehicle or aircraft, which has crossed a State or United States boundary after being stolen, knowing the same to have been stolen, shall be fined not more than $5,000 or imprisoned not more than five years, or both.
. Wolfs argument necessarily assumes that the due process clause, which affords defendants a right not to be convicted based upon involuntary confessions, can be invoked when the confession is allegedly coerced by foreign police. We have generally held that proрhylactic constitutional rules designed to deter police misconduct do not apply to foreign police behavior.
See, e.g., United States
v.
Chavarria,
The continuing vitality of this holding in
Brulay
was cast into serious doubt by
Colorado v. Connelly,
— U.S. -,
Because the apparent tension between Connelly and Brulay was not argued or briefed, and because in any case we hold that Wolfs confession was not unconstitutionally coerced, we need not determine Brulay's continuing vitality in light of Connelly or consider whether there is any other basis for extending the constitutional rule at issue here to the govern the conduct of foreign police. Rather, we assume without deciding that the constitutional protection against involuntary confessions applies to confessions coerced by foreign police.
. Wolf does not сontend that Vasquez or any other Mexican police official actually hit or physically abused him at any time.
. This colloquy took place during a pre-trial hearing on Wolfs motion to suppress his confession. Wolf represented himself at this hearing as well as at trial.
. R.T. at 52-53.
. R.T. at 69.
. R.T. at 70.
. The absence of
Miranda
warnings does not automatically taint his confession, as
Miranda's
prophylactic exclusionary rule does not apply to foreign police authorities.
Chavarria,
. Wolf admitted to stealing the van from a parking lot in El Cajon, when in fact it was stolen from a driveway in Coronado.
. R.T. at 69.
. R.T. at 69.
. R.T. at 70.
. R.T. at 90-91.
. R.T. at 101.
. In addition to arguing that the use of his confession violated his due process rights, Wolf also contends that the use of his confession violated his right against self-incrimination. Assuming arguendo that the right against self-incrimination applies to situations involving foreign police, see supra note 3, Wolfs self-incrimination argument fares no better on these facts than his due process claim.
Ninth Circuit cases have recognized that the government cannot introduce into evidence a confession elicited from a defendant during custodial interrogation unless it proves that the defendant voluntаrily waived her right against self-incrimination so that her confession was the "product of a rational intellect and a free will."
United States
v.
Pinion,
In
Colorado v. Connelly,
the Supreme Court cast some doubt on this understanding of the voluntariness inquiry governing waivers of the right to silence when it rejected the defendant’s argument that he did not "voluntarily” waive his right against self-incrimination because he felt compelled to confess by mental delusions. Writing for the Court, Chief Justice Rehnquist explained that the "voluntariness of a waiver of this privilege [against self-incrimination] has always depended on the absence of police overreaching, not on ‘free choice' in any broader sense of the word."
We need not decide here whether Chief Justice Rehnquist’s reasoning in Connelly undermines Pinion or Doe, as Wolf would have no colorable claim that his right аgainst self-incrimination was violated whichever version of the waiver issue is correct. Under de novo review, we reject the claim that the police used objectively unacceptable methods to coerce Wolf into waiving his right to silence for the same reasons that we reject his due process claim. And under the clearly erroneous test, we uphold the district court’s conclusion that there is "no evidence” to support Wolfs claim that his waiver was involuntary in the sense that his subjective will was overborne. Given these two conclusions, Wolfs self-incrimination argument is clearly meritless under any plausible version of the waiver issue.
. At trial, the following colloquy took place during Wolf s cross-examination of Vasquez:
Q. [W]hen we got to your station, did you tell me that if I would confess, you would let me go? A. No.
Q. [D]id you ever tell me if I confessed that the state judicial police would not beat me?
A. No.
Q. Didn’t you answer yes to all those questions yesterday under oath [at the suppression hearing]?
A. No.
R. T. at 147.
. [T]he [Supreme] Court has consistently held that a conviсtion obtained by the knowing use of perjured testimony is fundamentally unfair, and must be set aside if there is any reasonable likelihood that the false testimony could have affected the judgment of the jury.”
United States v. Agurs,
. Wolf offers no other evidence supporting his claim that Vasquez’ trial testimony was false or that the government knew it to be so other than the testimony’s alleged inconsistency with Vasquez’ testimony at the suppression hearing the previous day.
. The alleged inconsistency between Vasquez’ testimony at trial and his testimony at the supрression hearing seems to us far from obvious. Vasquez’ negative answer at trial to the question "did you tell me that if I would confess, you would let me go?” was consistent with his repeated claim during the suppression hearing that he had never told Wolf he would or even could let Wolf go if Wolf confessed. Vasquez’ *977 negative answer at trial to the question "did you ever tell me if I confessed that the state judicial police would not beat me?” is consistent with the government’s interpretation that Vasquez’ statement about other Mexican authorities was made to the judge at the suppression hearing but never articulated in front of Wolf during the interrogation. Finally, Vasquez’ negative answer at trial to the question "didn’t you answer yes to all those questions yesterday under oath?” was not clearly false, as the questions asked at trial were worded quite differently than those asked during the suppression hearing.
. The double jeopardy clause provides that "nor shall any person be subject for the same offence to be twice put in jeopardy of life or limb.” U.S. Const, amend. V.
