with whom Judges JAMES R. BROWNING and THOMAS join, dissenting:

The majority opinion purports to avoid deciding whether Article 36 of the Vienna Convention creates individually enforceable rights to consular notification. “[A]s-suming that some judicial remedies are available for the violation of Article 36,” Majority Opinion at 885, the majority nevertheless leaves as the only current form of enforcement the State Department’s self-described practice of “investigating reports of violations and apologizing to foreign governments, and working with domestic law enforcement to prevent further violations when necessary.” Majority Opinion at 887. This is equivalent to securing enforcement by a toothless, claw-less Mon. Defendants who actuahy have been prejudiced by the failure to be notified of their Article 36 rights may suffer imprisonment and other punishments to which they would not have been subjected had their rights been observed. Such an interpretation of the treaty hardly conforms to the due process principles embodied in the United States Constitution. We should not so interpret the treaty.

The majority reasons that some other countries do not recognize or enforce the rights to counsel and against self-incrimination in the same manner as does our country. This is irrelevant, as the treaty does not specify an exclusive means for enforcing the provisions of Article 36. That two of the more than 161 signatory countries have concluded that the Vienna Convention’s Article 36 protections “nei *889 ther target police interrogation nor seek to prevent self-incrimination or preserve the right to counsel,” Majority Opinion at 888, hardly dictates how the treaty provisions should be enforced in the United States. A foreign national arrested and prosecuted in the United States is entitled to the protections of our Constitution and the procedures of our criminal justice system. A foreign national whose right to counsel or against self-incrimination is violated in this country is entitled to suppression of evidence even if such a violation has no remedy in another country.

I agree with the majority’s conclusion that “a foreign national’s post arrest statements should not be excluded solely because he made them before being told of his right to consular notification.” Majority Opinion at 888 (emphasis added). Unlike a Miranda violation, a violation of Article 36 does not automatically require suppression. But when the foreign national can show that he or she has been prejudiced by the failure to advise him or her of such a right, that prejudice should be rectified according to the protections accorded by our Constitution. District courts are perfectly capable of making the factual determination whether a foreign national was prejudiced. See, e.g., United States v. Miranda, 65 F.Supp.2d 1002, 1007 (D.Minn.1999); United States v. Alvarado-Torres, 45 F.Supp.2d 986, 991 (S.D.Cal. 1999); United States v. Tapia-Mendoza, 41 F.Supp.2d 1250, 1254-55 (D.Utah 1999); United States v. Chaparro-Alcantara, 37 F.Supp.2d 1122, 1126-27 (C.D.Ill.1999) (all making factual finding that defendants did not establish prejudice from failure to inform them of right to contact consul).

Because I agree with Judge Pregerson’s opinion in this case (now withdrawn), I repeat significant portions of its reasoning here. See United States v. Lombera-Camorlinga, 170 F.3d 1241, 1242 (9th Cir.1999) (withdrawn). 1

Article 36(l)(b) of the Vienna Convention on Consular Relations provides:

Vienna Convention on Consular Relations, April 24, 1963, 21 U.S.T. 77, 101 (emphasis added). As a treaty made under the authority of the United States, the Vienna Convention is the supreme law of the land. U.S. Const, art. VI, cl. 2.

It is undisputed that the customs officers who took Lombera-Camorlinga’s statements did not inform him of the rights established by Article 36. Therefore, the customs officers violated the Vienna Convention.

While one of the purposes of Article 36 is to “facilitate] the exercise of consular functions relating to nationals of the sending State,” Convention, Art. 36(1), foreign nationals are more than incidental beneficiaries of Article 36(l)(b). The treaty language itself clearly states that the rights enumerated in sub-paragraph 36(l)(b) belong to the foreign national: “The said authorities shall inform the person concerned without delay of his rights under this sub-paragraph.” Convention, Art. 36(l)(b) (emphasis added). It strains the English language to interpret “his rights” in this context to refer to the Consulate’s rights. We held in United States v. Rangel-Gonzales, 617 F.2d 529, 532 (9th Cir.1980), that “[t]he right established by the *890 regulation and in this case by treaty is a personal one.”

Moreover, the language of the provision is not precatory, but rather mandatory and unequivocal. See INS v. Cardoza-Fonseca, 480 U.S. 421, 441 , 107 S.Ct. 1207 , 94 L.Ed.2d 434 (1987) (contrasting mandatory obligations and “precatory” provisions under the United Nations Protocol Relating to the Status of Refugees). Accordingly, individual foreign nationals have rights under Article 36(l)(b) of the Vienna Convention.

It has long been recognized that, where treaty provisions establish individual rights, these rights must be enforced by the courts of the United States at the behest of the individual. See United States v. Rauscher, 119 U.S. 407, 418-19 , 7 S.Ct. 234 , 30 L.Ed. 425 (1886) (citing Head Money Cases, 112 U.S. 580 , 5 S.Ct. 247 , 28 L.Ed. 798 (1884)); see also United States v. Alvarez-Machain, 504 U.S. 655, 659-60 , 112 S.Ct. 2188 , 119 L.Ed.2d 441 (1992) (recognizing the continuing authority of Rauscher). Because Article 36(l)(b) establishes individual rights, these rights must be enforced by our courts.

In determining an appropriate remedy for an Article 36 violation, we should look first to the language of the Article. See Alvarez-Machain, 504 U.S. at 663 , 112 S.Ct. 2188 (“In construing a treaty ... we first look to its terms to determine its meaning.”). The majority goes beyond the treaty language to rely heavily on a letter from the State Department filed in conjunction with litigation in the First Circuit. As the majority acknowledges, however, that letter is entitled to little deference, as it was prepared in the course of litigation. We should defer even less to the post-hoc rationalization of an agency charged with enforcement of a treaty provision when its enforcement has been so notably lax.

Article 36(2) provides: “The rights referred to in paragraph 1 of this article shall be exercised in conformity with the laws and regulations of the receiving State, subject to the proviso, however, that the said laws and regulations must enable full effect to be given to the purposes for which the rights accorded under this Article are intended.” Convention, Art. 36(2).

Despite the importance of the Vienna Convention, and its status as the supreme law of the land, law enforcement officials continue to overlook the rights Article 36(l)(b) establishes for foreign nationals who are “arrested, in prison, custody or detention.” Convention, Art. 36(l)(b). By failing to complain of these violations at trial, however, most individual defendants have “failed to exercise [their] rights under the Vienna Convention in conformity with the laws of the United States.” Breard v. Greene, 523 U.S. 371, 375-76 , 118 S.Ct. 1352, 1355 , 140 L.Ed.2d 529 (1998). As a result, violations of the Convention have often gone judicially unre-dressed. See, e.g., id.; Villafuerte v. Stewart, 142 F.3d 1124, 1125 (9th Cir.1998); LaGrand v. Stewart, 133 F.3d 1253, 1261 (9th Cir.), cert. denied, 525 U.S. 971 , 119 S.Ct. 422 , 142 L.Ed.2d 343 (1998) (all holding that the Convention claim was procedurally defaulted).

By raising his claim in a pretrial suppression motion, the appellant exercised his rights under the Convention in conformity with our laws. See Breard v. Pruett, 134 F.3d 615, 622 (4th Cir.1998) (Butzner, J., concurring) (“The provisions of the Convention should be implemented before trial when they can be appropriately addressed.”)

There is scant authority for the remedy in criminal cases involving violation of Article 36 of the Convention. We have addressed this issue, however, in eases involving prosecution for illegal entry following deportation. In United States v. Calderon-Medina, 591 F.2d 529, 531 (9th Cir.1979), an alien had not been advised of his right to consult consular officials in the underlying deportation under 8 C.F.R. § 242.2 (e) (1978), which required the INS to inform the alien of his right to consult with consular authorities. We *891 concluded that the alien’s later prosecution for illegal entry following deportation would be precluded if “the violation prejudiced interests of the alien which were protected by the regulation.” Id. As we explained in Calderon-Medina , § 242 was intended to ensure compliance with Article 36 of the Vienna Convention and to protect some interests of the alien, rather than of the consulate. Id. at 531 n. 6. Therefore, we remanded for the district court to consider whether these interests had been prejudiced.

In Rangel-Gonzales, 617 F.2d at 531 , we applied the standards laid down in Calderon-Medina . We held that because the defendant carried his burden to show some likelihood that had the same regulation “been followed his defense and the conduct of the hearing would have been materially affected,” the indictment for illegal entry should have been dismissed. Id. We concluded that the violation prejudiced the interests of the defendant as protected by the INS regulation and, by association, the Vienna Convention. As Judge Schroeder wrote:

Id. The government produced no evidence to rebut that showing. See id. at 533 .

I see no reason why the same standard should not apply in this case. Upon a showing that the Vienna Convention was violated by a failure to inform the alien of his right to contact his consulate, the defendant in a criminal proceeding has the initial burden of producing evidence showing prejudice from the violation of the Convention. If the defendant meets that burden, it is up to the government to rebut the showing of prejudice.

The majority dismisses Calderon-Medina and Rangel-Gonzales because in those cases an INS regulation implemented Article 36’s requirement of consular notification. But the fact that the INS (an agency most likely to have the initial obligation of consular notification) adopted a regulation which clearly regards Article 36 as conferring an individual right argues for, not against, a conclusion that Article 36 establishes an individual right. Further, in those two cases, in which the defendants showed prejudice, this court dismissed the indictments against them, thus according them a remedy even more drastic than the suppression of evidence.

In this case, Lombera-Camorlinga filed a motion to suppress his post-arrest statements because he was not first advised of his rights under the Vienna Convention. The district court denied the motion to suppress without making a determination of prejudice. We therefore should reverse and remand to the district court for a determination whether in making his post-arrest statements, Lombera-Camorlinga was prejudiced by the violation of the Vienna Convention.

with whom Judges JAMES R. BROWNING and BOOCHEVER join in full, and with whom Judge WARD LAW joins with respect to Section II, dissenting:

I respectfully dissent from the majority’s conclusion that the exclusionary rule is not the appropriate method by which a private right to consular notification should be enforced in the United States. 1 I also respectfully disagree with the majority’s holding that deference should be paid to an agency’s litigating position.

*892 I

The Vienna Convention on Consular Relations (“Vienna Convention” or “Treaty”) requires the United States law enforcement officers to inform arrested foreign nationals of their right to have their respective consulates notified of the arrest. See Vienna Convention on Consular Relations, Article 36(1), 21 U.S.T. 77. It further requires that this right be exercised in accordance with the laws of the arresting country. See id., Article 36(2). The majority begins with the assumption that, in the United States, the exclusionary rule is generally available only for constitutional violations. Therefore, the majority concludes, the exclusionary rule cannot be considered the normal method of enforcing private procedural rights, such as those that may be created by treaty.

The syllogism proceeds from a faulty premise. The exclusionary rule as applied to confessions is not uniquely American, nor was it given birth by our Constitution. Rather, it originated from English common law, formally enunciated in King v. Warickshall, 168 Eng. Rep. 234, 235 (K.B. 1783):

The Warickshall rule continued in United States common law. See, e.g., Ziang Sung Wan v. United States, 266 U.S. 1, 14-15 , 45 S.Ct. 1 , 69 L.Ed. 131 (1924); Harrold v. Territory of Oklahoma, 169 F. 47, 54 (8th Cir.1909); Bram v. United States, 168 U.S. 532, 542 , 18 S.Ct. 183 , 42 L.Ed. 568 (1897); Hopt v. Territory of Utah, 110 U.S. 574, 585 , 4 S.Ct. 202 , 28 L.Ed. 262 (1884). Indeed, the doctrine was so ingrained that, by 1813, it was observed in argument that “[i]f the prisoner has been once induced to confess, by a promise or threat, it is the common practice to reject a subsequent confession of the same, or like facts.” United States v. Charles, 25 F. Cas. 409, 410 (C.C.D.C. 1813).

The first suggestion that the rule excluding improperly obtained confessions had an additional constitutional basis came in Bram, 168 U.S. at 542 , 18 S.Ct. 183 . However, it was not until Brown v. Mississippi, 297 U.S. 278, 285-87 , 56 S.Ct. 461 , 80 L.Ed. 682 (1936), that the Court fully embraced the Constitution as its primary basis for excluding improperly obtained confessions. In short, the application of exclusionary rule to confessions has been firmly established in American jurisprudence from the beginning of the Republic, long before its Constitutional dimension was explored by the courts.

Thus, with respect to confessions, we cannot brush off the exclusionary rule as confined to constitutional violations; indeed, our entire judicial history belies it. The majority acknowledges this by referencing some of the numerous occasions the exclusionary rule has been applied in a statutory context, 2 but discounts those in *893 stances as farrago, with no import in discerning whether the exclusionary rule is our nation’s usual judicial remedy for violations of procedural rights. That may well be true in other contexts; for example, the exclusion of evidence obtained from an illegal search distinctly arises from the Fourth Amendment. See, e.g., Weeks v. United States, 232 U.S. 383 , 34 S.Ct. 341 , 58 L.Ed. 652 (1914). However, it is not true as applied to the exclusion of improperly obtained confessions.

The question then is whether it is appropriate to apply the exclusionary rule to confessions obtained in violation of the Vienna Convention. In construing a treaty, we look to its plain words. See United States v. Alvarez-Machain, 504 U.S. 655, 663 , 112 S.Ct. 2188 , 119 L.Ed.2d 441 (1992). The Treaty provides that if a prisoner “so requests, the competent authorities of the receiving State shall, without delay, inform the consular post of the sending State if, within its consular district, a national of that State is arrested or committed to prison or to custody pending trial or is detained in any other manner.” Vienna Convention, Article 36(1). It further provides that “[t]he said authorities shall inform the person concerned without delay of his rights under this sub-paragraph.” Id. All parties, including the United States, agree that this language requires United States law enforcement officials to inform an arrested foreign national of the right to have his or her national consul informed of the arrest. The Supremacy Clause makes treaties, such as the one at bar, “the supreme Law of the Land,” binding “the Judges in every State.” 3 U.S. Const., Art. VI, cl. 2; see also Chapman v. Houston Welfare Rights Org., 441 U.S. 600, 613 , 99 S.Ct. 1905 , 60 L.Ed.2d 508 (1979) (“[A]ll federal rights, whether created by treaty, by statute, or by regulation, are ‘secured’ by the Supremacy Clause.”).

How is the right to consular notification to be exercised? The Treaty is not silent on this: it provides that the right “shall be exercised in conformity with the laws and regulations of the receiving State.” 4 *894 Vienna Convention, Article 36(2). Under our common law, and Constitutional law, improperly obtained confessions are not admitted into evidence. Confessions obtained without informing the defendant of his right to an attorney are inadmissible. See Miranda v. Arizona, 384 U.S. 436 , 86 S.Ct. 1602 , 16 L.Ed.2d 694 (1966). Although the majority places great significance on the fact that Miranda was decided after the ratification of the Treaty, Miranda’s concerns about custodial interrogation without counsel did not appear as an epiphany: the Supreme Court had long considered denial of counsel a factor in determining whether, under the totality of the circumstances, a confession was voluntary. See Spano v. New York, 360 U.S. 315, 323 , 79 S.Ct. 1202 , 3 L.Ed.2d 1265 (1959); Harris v. South Carolina, 338 U.S. 68, 70-71 , 69 S.Ct. 1354 , 93 L.Ed. 1815 (1949); Haley v. Ohio, 332 U.S. 596, 600 , 68 S.Ct. 302 , 92 L.Ed. 224 (1948); Malinski v. New York, 324 U.S. 401, 405-06 , 65 S.Ct. 781 , 89 L.Ed. 1029 (1945).

It has also long been part of our law that the exclusionary rule applies to confessions obtained in violation of a defendant’s right to be brought promptly before a judicial officer. See Mallory v. United States, 354 U.S. 449, 455 , 77 S.Ct. 1356 , 1 L.Ed.2d 1479 (1957); McNabb v. United States, 318 U.S. 332, 341 , 63 S.Ct. 608 , 87 L.Ed. 819 (1943). 5 The McNabb-Mallory rule is relevant here because its theoretical underpinnings are similar to those upon which Article 36 rests, in that a similar duty to act with dispatch is imposed by the Treaty for the purpose of safeguarding rights. 6

Thus, when rights such as the right to have a consulate notified without delay have been violated, our courts have long applied the exclusionary rule as the remedy of choice under our law. The procedural protections we have required before admitting confessions as evidence were established to ensure that confessions were voluntary and obtained without employing improper means. Voluntariness is of special concern in the case of detained foreigners, who may neither speak English nor understand legal proceedings. 7 The panel’s requirement that the defendant show prejudice is also consistent with our common law rule that the totality of the circumstances be considered in determining whether a confession was voluntary. 8 '

The majority quite properly does not opine as to what remedies are available for enforcement of the right to consular notification. However, if one peeks behind the curtain, other alternatives are not attractive, nor are they consistent with the Treaty. In fact, the only options readily *895 apparent are private damage actions, or an acknowledgment that the Treaty created a private right without any remedy at all. The Treaty does not provide expressly for private damage actions. Rather, the plain words of the Treaty provide that the notification right “shall be exercised,” not that failure to notify should be compensated. Thus, the Treaty would not seem to contemplate private damage actions, and it would not be sound judicial policy to conjure a legal theory that would expose individual officers to liability for breaches of international treaties. The decision on whether to attach individual liability for such violations should be left to Congress.

That the right to consular notification may be a right without a remedy is also inconsistent with the Treaty’s command that the right “be exercised in conformity with the laws and regulations” of the arresting state. Our law of criminal procedure is not merely aspirational; when a procedural right has been established, it is enforced. Thus, alternative readings of what enforcement mechanism might exist under our laws simply do not make sense, either textually or in the context of how our criminal procedural laws are administered.

As a matter of judicial administration, it is also far better to resolve any question about the voluntariness of a confession before trial, rather than confront the question for the first time at the behest of a foreign government on the eve of an execution. See, e.g., Breard v. Greene, 523 U.S. 371 , 118 S.Ct. 1352, 1355 , 140 L.Ed.2d 529 (1998); Villafuerte v. Stewart, 142 F.3d 1124, 1125 (9th Cir.1998); LaGrand v. Stewart, 133 F.3d 1253, 1261 (9th Cir.), cert. denied, 525 U.S. 971 , 119 S.Ct. 422 , 142 L.Ed.2d 343 (1998).

For these reasons, I conclude that if a private right to consular notification exists under the Vienna Convention, the exclusionary rule is the appropriate method for enforcing that right in the United States when a defendant can demonstrate actual prejudice from the treaty violation.

II

I must respectfully also part company from the majority in its holding that we must defer to an agency’s litigating position. The Supreme Court has rejected such deference. See, e.g., Bowen v. Georgetown Univ. Hosp., 488 U.S. 204, 212 , 109 S.Ct. 468 , 102 L.Ed.2d 493 (1988). So have we. See, e.g., Resource Invs., Inc. v. U.S. Army Corps of Eng’rs, 151 F.3d 1162 , 1165 (9th Cir.1998). There is a sound basis for this rule. As the Supreme Court has explained, “Congress has delegated to the administrative official and not to appellate counsel the responsibility for elaborating and enforcing statutory commands.” Investment Co. Institute v. Camp, 401 U.S. 617, 628 , 91 S.Ct. 1091 , 28 L.Ed.2d 367 (1971). Administrative agency constructions of governing statutes, or in this case a treaty, performed outside the adversary system are properly worthy of deference. However, agency positions developed in response to a lawsuit are not of the same character: they are specifically tailored to help obtain a favorable outcome in a pending controversy in which the agency is involved. Although we must certainly consider the persuasive force of the agency’s argument, it is just that. The arguments advanced by an agency in litigation ought to rise or fall on their own weight.

Deference in this case is especially inappropriate because it is given to the agency’s litigation position in entirely separate litigation in another circuit. The reasoning of the Department of State has proved persuasive; we need not adopt a special rule deferring to its assertions as a matter of law. I respectfully suggest that we gravely err in creating such a rule.

III

A nation’s commitment to the rule of law is measured by its willingness to subject its own government to it. The Vienna Convention requires the United States law enforcement officers to inform arrested *896 foreign nationals of their right to have their respective consulates notified of the arrest. It further requires that this right be exercised in accordance with the laws of the arresting country. These obligations were not conjured by the judiciary: they were negotiated by the President and ratified by the United States Senate. Each year, the Department of State notifies law enforcement officials of their obligations under the Treaty.

Although we must be cautious not to intrude into the foreign policy of the United States, this treaty calls for enforcement in accordance with our laws. From the inception of our criminal justice system, we have refused to admit evidence of confessions obtained in violation of law. As Justice Frankfurter observed in McNabb , “[t]he history of liberty has largely been the history of observance of procedural protections.” 318 U.S. at 347 , 63 S.Ct. 608 . Thus, the exclusionary rule is the proper means of enforcing these specific treaty obligations when the defendant has shown actual prejudice. Our commitment to the rule of law requires us to afford detained foreign nationals our usual procedural remedies, just as we expect foreign governments to respect the rights of our citizens when they travel abroad.

. Although I have adopted substantial portions of that opinion verbatim, for ease in reading this dissent, direct quotation is not further indicated.

. The majority does not reach the issue of whether a private right of enforcement exists under the treaty. Rather, it limits its discussion to the judicial remedies afforded by the Treaty. This analysis is similarly confined.

. It is clear that; as a general matter, the Supreme Court has not limited the use of the exclusionary rule to constitutional violations. See United States v. Blue, 384 U.S. 251, 255 , 86 S.Ct. 1416 , 16 L.Ed.2d 510 (1966) (noting that the Supreme Court "in a number of areas has recognized or developed exclusionary rules where evidence has been gained in violation of the accused’s rights under the Constitution, federal statutes, or federal rules of procedure."); see also Miller v. United States, 357 U.S. 301, 313-14 , 78 S.Ct. 1190 , 2 L.Ed.2d 1332 (1958) (upholding suppression of evidence obtained in violation of 18 U.S.C. § 3109 , the federal “knock and announce” statute); Mallory v. United States, 354 U.S. 449, 455 , 77 S.Ct. 1356 , 1 L.Ed.2d 1479 (1957) (stating that suppression of statements obtained in violation of Fed.R.Crim.P. 5 would be proper if failure to arraign "without unnecessary delay” provided "an opportunity for the extraction of a confession”). Nor *893 have we. See, e.g., United States v. Gantt, 194 F.3d 987, 994 (9th Cir.1999) (holding that technical violations of Fed.R.Crim.P. 41 (d) require suppression if there was a "deliberate disregard of the rule” or "if the defendant was prejudiced”); United States v. Doe, 170 F.3d 1162, 1168 (9th Cir.1999) ("Although the § 5033 violation [of the Federal Juvenile Delinquency Act] is not a due process violation, it may serve as an independent basis for suppression.”) (citing United States v. Doe, 155 F.3d 1070, 1073 (9th Cir.1998) (en banc)), cert. denied, - U.S. -, 120 S.Ct. 429 , 145 L.Ed.2d 335 (1999); United States v. L.M.K., 149 F.3d 1033, 1035 (9th Cir.1998), as amended, 166 F.3d 1051 (9th Cir.1999) (stating that violation of § 5033 of Federal Juvenile Delinquency Act may, upon a showing of prejudice, justify limited remedies such as suppression, even though statutory violation does not deny due process), cert. denied, - U.S. -, 120 S.Ct. 106 , 145 L.Ed.2d 89 (1999); United States v. Van Poyck, 77 F.3d 285, 288 (9th Cir.1996) (noting that incriminating statements obtained in violation of Fed.R.Crim.P. 5(a) and 18 U.S.C. § 3501 (c) may be excluded by the court’s discretion); United States v. Soto-Soto, 598 F.2d 545, 550 (9th Cir.1979) ("Statutory law was disregarded. Exclusion of the evidence seized is the only available effective deterrent of such disregard.”); cf. United States v. Doe, 862 F.2d 776, 780-81 (9th Cir.1988) (holding that reversal of conviction is required if alien defendant was prejudiced by government’s failure to contact his parents and Mexican Consulate as required by Federal Juvenile Delinquency Act); United States v. Gatto, 763 F.2d 1040, 1046 (9th Cir.1985) (suggesting that supervisory power to exclude evidence could be exercised where there is a violation of "any constitutional provision, federal statute, specific discovery order, or any other recognized right”).

. The Supremacy Clause reads in full: "This Constitution, and the Laws of the United States which shall be made in Pursuance thereof; and all Treaties made, or which shall be made, under the Authority of the United States, shall be the supreme Law of the Land; and the Judges in every State shall be bound thereby, any Thing in the Constitution or Laws of any State to the Contrary notwithstanding.” U.S. Const., Art. VI, cl. 2.

. Thus, the fact that the exclusionary rule is not referenced in the Treaty is of no moment. The Treaty expressly contemplates that the enforcement mechanism be left to the laws of the arresting nation.

. It is also noteworthy that the McNabb-Mallory rule was not constitutionally based: McNabb was founded on the-Supreme Court's "exercise of its supervisory authority over the administration of criminal justice in the federal courts," 318 U.S. at 340 , 63 S.Ct. 608 , and Mallory was based on violations of procedural rules, see 354 U.S. at 451-52 , 77 S.Ct. 1356 .

. In its publication on the issue, the Department of State states that the requirement that the detained foreign national be informed of his right to contact his consulate "facilitate[s] the foreign government's ability to protect its nationals" including ensuring "they receive a fair and speedy trial with benefit of counsel.” Department of State, Consular Notification and Access 42-43 (1998).

. Indeed, that was the essence of Paraguay's claim against the United States in the International Court of Justice regarding the case of Angel Breard. Paraguay contended that Breard had language difficulty and that his confession “was based on a misunderstanding of the United States justice system” and that if the United States had complied with its duty of consular notification the "result would have been different.” In the Case Concerning the Application of the Vienna Convention on Consular Relations (Paraguay v. United States), 1998 I.C.J. (April 7) (Request for Indication of Provisional Measures, Verbatim Record).

.The majority reports that the confession in this case was voluntary. However, that conclusion was not based on a "totality of the circumstances” analysis that included the absence of consular notification as part of the examination.