Full opinion text
Judge STRAUB concurs in the opinion except as to Part II.C.3, and has filed a separate concurrence. JACOBS, Circuit Judge. This appeal, which arises from the government’s investigation of the September 11, 2001 terrorist attacks, presents questions about the scope of the federal material witness statute and the government’s powers of arrest and detention thereunder. See 18 U.S.C. § 3144. The district court (Scheindlin, J.) ruled that the statute cannot be applied constitutionally to a grand jury witness such as the defendant-appel-lee, Osama Awadallah, and dismissed the perjury indictment against him as fruit of an illegal detention. The court also suppressed his grand jury testimony as fruit of an illegal detention on the alternative ground that the affidavit in support of the arrest warrant included material misrepresentations. We conclude that these rulings must be reversed and the indictment reinstated. We also reverse the district court’s independent ruling that the FBI’s unreasonable searches and seizures on September 20 and 21, 2001, before Awadallah was arrested as a material witness, require suppression at trial of certain statements and physical evidence. BACKGROUND In the days immediately following September 11, 2001, the United States Attorney for the Southern District of New York initiated a grand jury investigation into the terrorist attacks. Investigators quickly identified Nawaf Al-Hazmi and Khalid Al-Mihdhar as two of the hijackers on American Airlines Flight 77, which crashed into the Pentagon. The Justice Department released the identities of all nineteen hijackers on Friday, September 14, 2001, and news media around the country publicized their names and photographs the following day. A search of the car Al-Hazmi abandoned at Dulles Airport in Virginia produced a piece of paper with the notation, “Osama 589-5316.” Federal agents tracked this number to a San Diego address at which the defendant, Osama Awa-dallah, had lived approximately eighteen months earlier. Al-Hazmi and Al-Mih-dhar also had lived in the San Diego vicinity around that time. The district court made extensive factual findings concerning the ensuing events of September 20 and 21, 2001. See United States v. Awadallah, 202 F.Supp.2d 82, 85-96 (S.D.N.Y.2002) (“Awadallah /V”). With two minor exceptions, the court credited Awadallah’s testimony over that of the FBI agents. See id. at 88 n. 9. The government states that it “strongly disagrees with the account of events accepted by the District Judge, and believes the agents testified truthfully and acted entirely properly in their dealings with Awadallah.” (Appellant’s Br. at 8.) However, the government “has elected not to appeal Judge Scheindlin’s credibility findings and does not contest them here.” (Id.) For purposes of this appeal, then, the government accepts and relies on the facts found by the district court, as does Awadallah. (Ap-pellee’s Br. at 1-2.) Our recitation of the facts conforms to the district court’s findings. On the morning of September 20, 2001, federal agents went to Awadallah’s current residence in San Diego. When the agents arrived at the apartment, Awadallah was attending a course in English as a second language at nearby Grossmont College, where he was enrolled. The agents interviewed Awadallah’s roommate in their apartment for several hours. When Awadallah came home at around 2:00 p.m. that afternoon, several agents approached him as he entered the parking lot and got out of his car (a gray Honda). They questioned him in the parking lot for a few minutes and then told him that he had to accompany them to the FBI office for questioning. Awadallah insisted on returning to his apartment first to observe the afternoon Muslim prayer, which he did as the agents watched. When Awadallah went into the bathroom, the agents insisted that the bathroom door be left open. Before leaving for the FBI office, an agent asked Awadallah to sign a consent form allowing them to search his apartment and car. Otherwise, the agent told him, they would get a warrant and “tear up” his home. Believing he had no choice, Awadallah signed the form without reading it. See Awadallah IV, 202 F.Supp.2d at 89 & n. 13. The agents then put him in their car and drove him to the FBI office. Awadallah told them that he had to return in time for a 6:00 p.m. computer class; they told him that would be no problem. At the FBI office, agents offered Awa-dallah a drink, but he declined because he was fasting. They asked him to sign another consent form for the search of his second car, an inoperative white Honda in the parking lot of his apartment building. This time, Awadallah read the form and learned that he had a right to refuse consent; and though he signed the consent form for his second car, he explicitly revoked his consent for the search of the first car. An agent tried to reach the agents at the apartment building by cell phone, but did not reach them until fifteen minutes later, after the search of the first car had been completed. The agents at the scene then searched the apartment and the second car. The search of Awadallah’s home produced several computer-generated photographs of Osama bin Laden; the searches of his cars produced two videotapes on Bosnia and one on Islam and a retractable razor which could be described as a box-cutter or a carpet knife. Awadallah was alone in a locked interview room for a while, until agents arrived to question him. They did not advise him of his rights or tell him that he could leave. They asked him about the September 11 hijackers and about his life and acquaintances. He told the agents that he knew Al-Hazmi, and that he had frequently seen another man with him, whose name he did not know. The district court found that Awadallah was “cooperative” throughout this questioning. See Awadallah TV, 202 F.Supp.2d at 92. We construe this finding to mean that he responded to questions, not that he necessarily responded truthfully or completely. When 6:00 p.m. approached, the agents told Awadallah that they had called his school and that it was alright for him to miss class. They told him he would “have to stay” with them until they were finished. The entire interview lasted approximately six hours, ending at nearly 11:00 p.m. Before allowing Awadallah to leave, the agents scheduled a polygraph examination for the next morning. The record does not show whether an agent was posted at Awadallah’s apartment building overnight, but the district court stated that “[h]e was not guarded or surveilled overnight.” Awadallah TV, 202 F.Supp.2d at 99. At 6:30 a.m. the following day, September 21, 2001, Awadallah called the FBI and refused to come in for the polygraph test until he had a lawyer. The agent told him they would get an arrest warrant. Believing he had no choice, Awadallah went with two agents who picked him up at his apartment at 7:00 a.m. At the FBI office, agents advised Awa-dallah of his rights and he signed an advice-of-rights acknowledgment form. The polygraph exam lasted one-and-a-half to two hours. Afterward, the agents told Awadallah that the polygraph registered lies in response to two questions: whether he had advance knowledge of the September 11 attacks and whether he had participated in them in any way. It is unclear whether these were in fact the results. The conversation became heated as the agents accused Awadallah of being a terrorist. They refused Awadallah’s requests to call a lawyer and his brother, and did not release him in time for Friday prayer. Throughout the questioning that day, the FBI agents in San Diego had been in contact with an Assistant United States Attorney (“AUSA”) in New York. At approximately 2:00 p.m. Eastern time, the AUSA instructed the agents to arrest Awadallah as a material witness. The agents handcuffed Awadallah and took him to the San Diego correctional center for booking. Meanwhile, prosecutors and agents in New York prepared an application for a material witness warrant. In the supporting affidavit, FBI Special Agent Ryan Plunkett recounted how the FBI found the phone number in Al-Hazmi’s car, Awadal-lah’s admission that he knew Al-Hazmi, and the results of the agents’ searches, including the “box-cutter” and the photographs of bin Laden. Agent Plunkett stated that it might become difficult to secure Awadallah’s grand jury testimony because he had extensive family ties in Jordan and might be a flight risk. The affidavit did not say when Awadallah said he had last seen Al-Hazmi (over a year earlier); that Awadallah had moved eighteen months earlier from the address associated with the phone number; that Awadallah had used the “box-cutter” recently to install a new carpet in his apartment; that Awadal-lah had been (ostensibly) cooperative with the FBI agents in San Diego; or that Awadallah had three brothers who lived in San Diego, one of whom was an American citizen. Also, the affidavit stated that the “box-cutter” had been found in Awadal-lah’s apartment when, in fact, it had been found in his inoperative second car. See Awadallah TV, 202 F.Supp.2d at 96. Shortly before 6:00 p.m. Eastern time, Agent Plunkett and an AUSA presented the material witness warrant application to Chief Judge Mukasey of the United States District Court for the Southern District of New York. Based solely on the contents of Agent Plunkett’s affidavit, Chief Judge Mukasey issued a warrant to arrest Awa-dallah as a material witness pursuant to 18 U.S.C. § 8144. The court was unaware that Awadallah had already been arrested as a material witness three hours earlier. See Awadallah IV, 202 F.Supp.2d at 95. On September 25, 2001, Awadallah appeared before a Magistrate Judge Ruben B. Brooks in the Southern District of California, who declined to release him on bail and ordered that he be removed to New York. On October 2, 2001, the day after he arrived in New York, Awadallah appeared before Chief Judge Mukasey for a second bail hearing. Chief Judge Mukasey also declined to release Awadallah on bail, finding his continued detention to be “reasonable under the circumstances.” During the period of his detention, Awa-dallah spent time in four prisons as he was transferred to the New York correctional center by way of Oklahoma City. He alleges that he received harsh and improper treatment during this period. Because these allegations of abuse and mistreatment were immaterial to the issues before the district court, Judge Scheindlin expressly declined to make “findings of fact on disputed issues regarding the conditions of confinement.” See United States v. Awadallah, 202 F.Supp.2d 55, 59 n. 4 (S.D.N.Y.2002) (“Awadallah III”). Nonetheless, Judge Scheindlin noted that Awa-dallah spent most of his time in solitary confinement; at times lacked access to his family, his lawyer, or a phone; and was repeatedly strip-searched. See id. at 60-61 & n. 5. The government did not dispute that, by October 4, 2001, “Awadallah had bruises on his upper arms,” and an agent’s report indicated several other injuries on his shoulder, ankles, hand, and face. See id. at 61. Awadallah sometimes refrained from eating because the meals provided did not comply with his religious dietary restrictions. On October 10, 2001, twenty days after his arrest as a material witness, Awadallah testified before the grand jury in the Southern District of New York. The prosecutor questioned him for most of the day. In the course of his testimony, Awadallah denied knowing anyone named Khalid Al-Mihdhar or Khalid. The government then showed him an examination booklet he had written in September, which the government obtained from his English teacher in San Diego. The booklet contained the following handwritten sentence: “One of the qui[e]test people I have met is Nawaf. Another one his name Khalid. They have stayed in S.D. [San Diego] for 6 months.” Awadallah acknowledged that it was his examination booklet, and that most of the writing in it was his own, but he denied that the name Khalid and a few other words on the page were written in his handwriting. On October 15, 2001, when Awadallah again appeared before the grand jury, he stated that his recollection of Khalid’s name had been refreshed by his October 10 testimony and that the disputed writing in the exam booklet was in fact his own. However, he did not admit to making false statements in his first grand jury appearance. The United States Attorney for the Southern District of New York filed charges against Awadallah on two counts of making false statements to the grand jury in violation of 18 U.S.C. § 1623: falsely denying that he knew Khalid Al-Mih-dhar (Count One); and falsely denying that the handwriting in the exam booklet was his own (Count Two). On November 27, 2001, the district court (Scheindlin, J.) granted Awadallah’s bail application. See United States v. Awadallah, 173 F.Supp.2d 186, 192-93 (S.D.N.Y.2001) (“Awadallah I”). He satisfied the bail conditions and was released approximately two weeks later. In December 2001, Awadallah moved to dismiss the indictment on four grounds: (1) recantation; (2) mistreatment in violation of his due process rights; (3) interference with his right to counsel; and (4) violation of the Vienna Convention on Consular Relations. He also moved to suppress the statements and search evidence obtained by the FBI on September 20 and 21, on the grounds that he had been seized illegally and that his consent to the searches was involuntary. On January 31, 2002, the district court rejected the grounds cited by Awadallah for dismissal. See United States v. Awadallah, 202 F.Supp.2d 17 (S.D.N.Y.2002) (“Awadallah II”). In the same order, however, the court sua sponte raised two other possible grounds for dismissal: (1) the possibility that Awadallah was the victim of a “perjury trap,” id. at 43-44, and (2) the court’s supervisory power to suppress his grand jury testimony if suppression is warranted by the circumstances of his arrest and treatment, id. at 52-53. The court ordered that these issues, in addition to Awadallah’s Fourth Amendment claims, be taken up at an evidentiary hearing. On April 30, 2002, after an evidentiary hearing and further briefing, the district court issued two orders dismissing the indictment against Awadallah. In Awadal-lah III, the court ruled that the federal material witness statute, 18 U.S.C. § 3144, did not apply to grand jury witnesses. 202 F.Supp.2d at 61-79. This ruling evidently was made without briefing or argument. The court held that Awadallah’s arrest and detention were therefore unlawful. Applying reasoning developed in the Awadallah II decision, Judge Scheindlin ruled that Awadallah’s perjured grand jury testimony had to be suppressed as fruit of this illegal arrest and detention. Id. at 79-82. In Awadallah TV, the district court held in the alternative that the indictment also had to be dismissed because the government’s affidavit in support of the material witness warrant contained material omissions and misrepresentations. Id. at 96-100. Once again, the court held that the grand jury testimony was fruit of the illegal arrest and detention. Id. As a separate matter, the district court also ruled that Awadallah had been seized in violation of the Fourth Amendment and that he had given no voluntary consent to the searches. Id. at 101-07. Accordingly, the court suppressed statements and physical evidence obtained by the FBI on September 20 and 21, 2001 before Awadallah’s arrest as a material witness. Id. at 100-07. The government filed a timely notice of appeal from the Awadallah III and Awa-dallah IV decisions on May 2, 2002. In this same notice, the government appealed the Awadallah II decision, which had been issued over three months earlier. Awadal-lah remains free on bail at this time. DISCUSSION We consider the issues presented on appeal in the order in which the district court developed them: (1) whether the federal material witness statute, 18 U.S.C. § 3144, may be applied to grand jury witnesses like Awadallah; (2) whether material misrepresentations in the government’s affidavit in support of the material witness warrant require the suppression of Awa-dallah’s grand jury testimony and the dismissal of the indictment against him; and (3) whether evidence obtained by the government on September 20 and 21 before Awadallah was formally detained as a material witness must be suppressed as the fruit of illegal searches and seizures. I. Applicability of 18 U.S.C. § 3144 The first issue presented is whether the federal material witness statute, 18 U.S.C. § 3144, allows the arrest and detention of grand jury witnesses. In Awadallah III, the district court determined that it did not. Shortly thereafter, however, on July 11, 2002, Chief Judge Mukasey issued an opinion in an unrelated case that declined to follow the reasoning and holding of Awadallah III. Specifically, Judge Mukasey held that 18 U.S.C. § 3144 applies to grand jury witnesses. See In re Material Witness Warrant, 213 F.Supp.2d 287, 288 (S.D.N.Y.2002). Thus there is now a split of authority within the Circuit on this question. As discussed at oral argument, we might evade this issue by holding that Awadal-lah’s allegedly false testimony should not have been suppressed as fruit of the poisonous tree even if his detention under § 3144 was improper, and that the indictment therefore should not have been dismissed. We reach the issue, however, because the present split within our Circuit on the scope of § 3144 affects the liberty interests of persons identified as material witnesses, the security and law enforcement interests of the government, and the ability of courts to make prompt and fair rulings on present and future detentions. It is true that “at times courts are well advised to avoid an issue presented in litigation by relying on an alternative ground.” United States v. Tomasi, 313 F.3d 653, 659 n. 4 (2d Cir.2002). “But there is no principle of law or jurisprudence to the effect that such avoidance is required. In some circumstances it is the better course to decide, rather than avoid, a question presented.” Id. Both parties to this appeal, as well as the amici, persuasively urge us to decide whether § 3144 may properly be applied to grand jury witnesses. The issue is squarely presented, has been fully briefed, and will tend to evade review in future cases where the detention is brief or matters take a different procedural course. Section 3144, titled “[rjelease or detention of a material witness,” provides in its entirety: If it appears from an affidavit filed by a party that the testimony of a person is material in a criminal proceeding, and if it is shown that it may become impracticable to secure the presence of the person by subpoena, a judicial officer may order the arrest of the person and treat the person in accordance with the provisions of section 3142 of this title. No material witness may be detained because of inability to comply with any condition of release if the testimony of such witness can adequately be secured by deposition, and if further detention is not necessary to prevent a failure of justice. Release of a material witness may be delayed for a reasonable period of time until the deposition of the witness can be taken pursuant to the Federal Rules of Criminal Procedure. 18 U.S.C. § 3144. The statute is cast in terms of a material witness in “a criminal proceeding.” The decisive question here is whether that term encompasses proceedings before a grand jury. Based on its study of the statutory wording, context, legislative history, and case law, the district court held that “Section 3144 only allows the detention of material witnesses in the pretrial (as opposed to the grand jury) context.” Awadallah III, 202 F.Supp.2d at 76. We have found no other decision that has arrived at this conclusion. The only prior case that squarely considered the issue held that 18 U.S.C. § 3149, the precursor to today’s material -witness statute, allowed detention of grand jury witnesses. See Bacon v. United States, 449 F.2d 933, 936-41 (9th Cir.1971). The Ninth Circuit conceded that “[t]he term ‘criminal proceeding,’ absent a clear context, [was] ambiguous,” id. at 939, but held that the relevant statutes and Federal Rules of Criminal Procedure, “[t]aken as a whole,” were “clearly broad enough in scope to encompass grand jury investigations,” id. at 941. Other courts, including this one, have assumed that the material witness statute authorizes detention of grand jury witnesses. See In re Grand Jury Subpoena (United States v. Koecher), 755 F.2d 1022, 1024 & n. 2 (2d Cir.1985) (noting prior unpublished order which required that defendant “remain subject to the warrant of arrest as a material witness” during remand to determine proper scope of grand jury investigation), vacated as moot, 475 U.S. 138, 106 S.Ct. 1253, 89 L.Ed.2d 103 (1986); see also In re De Jesus Berrios, 706 F.2d 355, 356-58 (1st Cir.1983) (upholding on other grounds the arrest of a material witness in a grand jury investigation); United States v. Oliver, 683 F.2d 224, 230-31 (7th Cir.1982) (same); United States v. McVeigh, 940 F.Supp. 1541, 1562 (D.Colo.1996) (finding government affidavit sufficient to justify arrest of defendant Terry Nichols under § 3144 to testify as material witness before grand jury investigating the Oklahoma City bombing); In re Thornton, 560 F.Supp. 183, 184 (S.D.N.Y.1983) (denying motion for relief from civil contempt order by witness who had been “arrested on a material witness warrant issued ... pursuant to 18 U.S.C. § 3149 ... to appear and testify before a federal grand jury”); cf. Arnsberg v. United States, 757 F.2d 971, 981-82 (9th Cir.1985) (finding federal agents immune from false imprisonment suit after they arrested a grand jury witness pursuant to a warrant issued under § 3149). Two judges have also declined to follow the district court’s ruling in this case. In In re Material Witness Warrant, 213 F.Supp.2d 287 (S.D.N.Y.2002), Chief Judge Mukasey “decline[d] to follow the reasoning and holding in Awadallah,” id. at 288, holding instead: Given the broad language of the statute, its legislative history ..., the substantial body of case law indicating that there is no constitutional impediment to detention of grand jury witnesses, and the unquestioned application of the statute to grand jury witnesses over a period of decades before Awadallah, to perceive a Congressional intention that grand jury witnesses be excluded from the reach of section 3144 is to perceive something that is not there. Id. at 300; see also In re Grand Jury Material Witness Detention, 271 F.Supp.2d 1266, 1268 (D.Or.2003) (concluding that “a grand jury proceeding constitutes a ‘criminal proceeding,’ as the term is used in § 3144”). Having the benefit of thorough opinions on both sides of the question, we conclude that the district court’s ruling in this case must be reversed. A. Standard of Review When “[t]he district court’s dismissal of [an] indictment raises questions of constitutional interpretation, ... we review the district court’s decision de novo.” United States v. King, 276 F.3d 109, 111 (2d Cir.2002) (reversing dismissal of indictment because statute in question was “a permissible exercise of Congressional authority under the Commerce Clause”). This standard of review comports with our customary approach to questions of statutory interpretation and constitutionality. See United States v. Pettus, 303 F.3d 480, 483 (2d Cir.2002) (reviewing a “question of statutory interpretation and of the constitutionality of [a statute] de novo ”); Muller v. Costello, 187 F.3d 298, 307 (2d Cir.1999). In construing a statute, we begin with its language and plain meaning. See United States v. Koh, 199 F.3d 632, 636 (2d Cir.1999); United States v. Figueroa, 165 F.3d 111, 114 (2d Cir.1998); United States v. Proyect, 989 F.2d 84, 87 (2d Cir.1993) (“[W]hen the language of the statute is clear, its plain meaning ordinarily controls its construction.”). “However, where statutory language is ambiguous a court may resort to the canons of statutory interpretation and to the statute’s legislative history to resolve the ambiguity.” Canada Life Assurance Co. v. Converium Ruckversicherung (Deutschland) AG, 335 F.3d 52, 57 (2d Cir.2003). B. Language of the Statute As noted above, § 3144 applies to witnesses whose testimony is material in “a criminal proceeding.” 18 U.S.C. § 3144. “Criminal proceeding” is a broad and capacious term, and there is good reason to conclude that it includes a grand jury proceeding. First, it has long been recognized that “[t]he word ‘proceeding’ is not a technical one, and is aptly used by courts to designate an inquiry before a grand jury.” Hale v. Henkel, 201 U.S. 43, 66, 26 S.Ct. 370, 50 L.Ed. 652 (1906); cf. Cobbledick v. United States, 309 U.S. 323, 327, 60 S.Ct. 540, 84 L.Ed. 783 (1940) (“The proceeding before a grand jury constitutes ‘a judicial inquiry of the most ancient lineage.”) (citation omitted). Second, the term “criminal proceeding” has been construed in other statutes to encompass grand jury proceedings. For example, the statute authorizing the government to appeal from “a decision or order of a district court suppressing or excluding evidence ... in a criminal proceeding,” 18 U.S.C. § 3731 (emphasis added), has been construed to authorize appeal of such an order from a grand jury proceeding. See, e.g., In re Grand Jury Subpoena Duces Tecum Dated Jan. 2, 1985, 775 F.2d 499, 502 (2d Cir.1985) (“It has been held that a grand jury proceeding is ‘a criminal proceeding’ within the portion of the Criminal Appeals Act, 18 U.S.C. § 3731, that entitles the Government to appeal from a decision or order of a district court suppressing or excluding evidence.”); In re Grand Jury Empanelled Feb. 14, 1978, 597 F.2d 851, 857 (3d Cir.1979) (observing that, “[i]n deciding questions pertaining to appellate jurisdiction, this circuit and others have adopted the view that the grand jury is a criminal proceeding”). At least one court has reached the same conclusion under a statute that punishes interstate flight “to avoid giving testimony in any criminal proceedings,” 18 U.S.C. § 1073 (emphasis added). See Hemans v. United States, 163 F.2d 228, 235-37 (6th Cir.1947) (construing former version of statute codified at 18 U.S.C. § 408e). Notwithstanding this support for the general view that “criminal proceedings” encompass grand jury proceedings, however, we cannot say that the statutory wording alone compels that conclusion. Black’s Law Dictionary defines a “criminal proceeding” as “[a] proceeding instituted to determine a person’s guilt or innocence or to set a convicted person’s punishment; a criminal hearing or trial.” Black’s Law Dictionary 1221 (7th ed.1999). It defines a “grand jury” as “[a] body of ... people ... who, in ex parte proceedings, decide whether to issue indictments. If the grand jury decides that evidence is strong enough to hold a suspect for trial, it returns a bill of indictment ... charging the suspect with a specific crime.” Id. at 706. Defined this way, a grand jury proceeding is not a “proceeding instituted to determine a person’s guilt or innocence or to set a convicted person’s punishment,” but rather a proceeding to “decide whether to issue indictments.” Cf. United States v. Mandujano, 425 U.S. 564, 573, 96 S.Ct. 1768, 48 L.Ed.2d 212 (1976) (“[T]he grand jury’s mission is ... to determine whether to make a presentment or return an indictment.”). A grand jury proceeding is certainly a stage of criminal justice; and it is certainly a proceeding. As a proceeding, it is certainly not civil, administrative, arbi-tral, commercial, social, or any type of proceeding other than (or as much as) criminal. Even so, the dictionary entries could suggest that grand jury proceedings lie outside the scope of § 3144. As the district court observed, this Court applied such a view in United States v. Thompson, 319 F.2d 665 (2d Cir.1963). In Thompson, a divided panel held that the meaning of the term “criminal proceeding” was ambiguous as used in the Walsh Act, 28 U.S.C. § 1783 et seq., which confers power upon district courts to issue subpoenas to witnesses outside the United States. The panel ultimately concluded that the term did not encompass grand jury proceedings. 319 F.2d at 668-70. In dissent, Judge Kaufman observed that the majority’s conclusion was “tortured” and argued that the plain meaning of “criminal proceeding” encompassed grand jury proceedings. Id. at 671-73. Congress agreed with Judge Kaufman the following year. But the split in a panel of this Court runs counter to the view that a “criminal proceeding” plainly encompasses a grand jury proceeding. The statutory context does not allay all uncertainty. Under § 3144, a judge “may order the arrest of the person and treat the person in accordance with the provisions of section 3142 of this title.” 18 U.S.C. § 3144. Section 3142, which sets conditions for the “[r]elease or detention of a defendant pending trial,” uses terms not normally associated with grand juries. It provides: Upon the appearance before a judicial officer of a person charged with an offense, the judicial officer shall issue an order that, pending trial, the person be — (1) released on personal recognizance or upon execution of an unsecured appearance bond ...; (2) released on a condition or combination of conditions ...; (3) temporarily detained to permit revocation of conditional release, deportation, or exclusion ...; or (4) detained 18 U.S.C. § 3142(a) (emphasis added). By its own terms, § 3142 applies during the post-indictment (“a person charged with an offense”) and pretrial (“pending trial”) phase of criminal prosecution. The section also goes on to identify factors to be considered “in determining whether there are conditions of release that will reasonably assure the appearance of the person as required and the safety of any other person and the community.” 18 U.S.C. § 3142(g). Two of the four listed considerations have little bearing on the situation of an individual detained as a material witness in a grand jury proceeding. See 18 U.S.C. § 3142(g)(1) (“[t]he nature and circumstances of the offense charged”); id. § 3142(g)(2) (“the weight of the evidence against the person”). For these reasons, we must look beyond the text of § 3144 to discern the meaning of “criminal proceeding.” C. Legislative History The legislative history of § 3144 makes clear Congress’s intent to include grand jury proceedings within the definition of “criminal proceeding.” Congress enacted § 3144 in its current form as part of the Bail Reform Act of 1984. See Pub.L. No. 98-473, 98 Stat. 1837, 1976-81 (1984). Its language is nearly identical to the text of its predecessor statute, 18 U.S.C. § 1349 (1966), which the Ninth Circuit construed to encompass grand juries. See Bacon, 449 F.2d at 989-41. The most telling piece of legislative history appears in the Senate Judiciary Committee Report that accompanied the 1984 enactment of § 3144. The Report stated that, “[i]f a person’s testimony is material in any criminal proceeding, and if it is shown that it may become impracticable to secure his presence by subpoena, the government is authorized to take such person into custody.” S.Rep. No. 98-225, at 28 (1983), reprinted in 1984 U.S.C.C.A.N. 3182, 3211. A footnote to this statement advised categorically that “[a] grand jury investigation is a ‘criminal proceeding’ within the meaning of this section. Bacon v. United States, 449 F.2d 933 (9th Cir.1971).” Id. at 25 n. 88, 1984 U.S.C.C.A.N. at 3208. The approving citation to Bacon by the Senate Committee with responsibility for this bill is as indicative as the text of the footnote. Committee reports are not always rehable interpretive tools, see Shannon v. United States, 512 U.S. 573, 583, 114 S.Ct. 2419, 129 L.Ed.2d 459 (1994) (noting that “a single passage of legislative history” should not be given “authoritative weight” when it “is in no way anchored in the text of the statute”), but we may look to them in discerning Congressional intent: In surveying legislative history we have repeatedly stated that the authoritative source for finding the Legislature’s intent lies in the Committee Reports on the bill, which “represen[t] the considered and collective understanding of those Congressmen involved in drafting and studying proposed legislation.” Garcia v. United States, 469 U.S. 70, 76, 105 S.Ct. 479, 83 L.Ed.2d 472 (1984) (citation omitted); see also Eldred v. Ashcroft, 537 U.S. 186, 210 n. 16, 123 S.Ct. 769, 154 L.Ed.2d 683 (2003); Thornburg v. Gingles, 478 U.S. 30, 44 n. 7, 106 S.Ct. 2752, 92 L.Ed.2d 25 (1986). Here, the Senate committee report states in so many words the intent to include grand jury proceedings within the ambit of the statute — an intent that is consistent with the statute’s language, even if not compelled by it. This statement of congressional intent is particularly telling, because the Bail Reform Act of 1984 reenacted the provisions of the former § 3149 in nearly identical language. “Congress is presumed to be aware of an administrative or judicial interpretation of a statute and to adopt that interpretation when it re-enacts a statute without change.” See Lorillard v. Pons, 434 U.S. 575, 580, 98 S.Ct. 866, 55 L.Ed.2d 40 (1978). In Lorillard, as here, there was clear evidence that Congress had considered the specific judicial interpretation in question. See id. at 581, 98 S.Ct. 866; see also Holder v. Hall, 512 U.S. 874, 961, 114 S.Ct. 2581, 129 L.Ed.2d 687 (1994) (separate opinion of Stevens, /.) (noting that, “[w]hen a Congress that re-enacts a statute voices its approval of an administrative or other interpretation thereof, Congress is treated as having adopted that interpretation, and [the courts are] bound thereby”); In re Material Witness Warrant, 213 F.Supp.2d at 297. Awadallah and an amicus party supporting his position argue that this principle of ratification by reenactment is inapplicable because there was no “settled judicial interpretation” of the term “criminal proceeding” when § 3144 was enacted in 1984. (Amicus Br. of NYCDL at 23 (quoting Holder, 512 U.S. at 920, 114 S.Ct. 2581).) We disagree. The Senate report stated that “[a] grand jury investigation is a ‘criminal proceeding’ within the meaning of this section.” S.Rep. No. 98-225, at 25 n. 88 (1983), 1984 U.S.C.C.A.N. at 3208 (emphasis added). As of 1984, a single court had expressly considered whether the term “criminal proceeding” within the meaning of the federal material witness statute included grand jury proceedings— and it had held that it did. See Bacon, 449 F.2d at 939-41. This Court had reached a different conclusion in Thompson, but only in connection with an unrelated statute, 319 F.2d at 668-70, and that interpretation was legislatively overruled the following year, see supra note 5. When Congress enacted § 3144 — and until the district court ruled otherwise in this case — there was a settled view that a grand jury proceeding is a “criminal proceeding” for purposes of the material witness statute. We therefore conclude that a grand jury proceeding is a “criminal proceeding” for purposes of § 3144. D. Constitutional Considerations In concluding that § 3144 does not apply to grand jury witnesses, the district court invoked the canon of constitutional avoidance, under which a court should construe an ambiguous statute to avoid constitutional problems if a viable alternative interpretation exists. See Awadallah III, 202 F.Supp.2d at 76-77 (citing INS v. St. Cyr, 533 U.S. 289, 299-300, 121 S.Ct. 2271, 150 L.Ed.2d 347 (2001); Edward J. De-Bartolo Corp. v. Florida Gulf Coast Bldg. & Constr. Trades Council, 485 U.S. 568, 575, 108 S.Ct. 1392, 99 L.Ed.2d 645 (1988)). This rule, which facilitates a choice between alternative interpretations of an ambiguous statute, has no bearing if the meaning of the statute is known. See Dep’t of Hous. & Urban Dev. v. Rucker, 535 U.S. 125, 134, 122 S.Ct. 1230, 152 L.Ed.2d 258 (2002) (noting that “the canon of constitutional avoidance ... ‘has no application in the absence of statutory ambiguity ”) (quoting United States v. Oakland Cannabis Buyers’ Coop., 532 U.S. 483, 494, 121 S.Ct. 1711, 149 L.Ed.2d 722 (2001)). Here, we have determined that Congress intended to place grand jury proceedings within the scope of § 3144. The canon of constitutional avoidance therefore does not come into play. Cf. St. Cyr, 533 U.S. at 299, 121 S.Ct. 2271 (noting the corollary rule that, “when a particular interpretation of a statute invokes the outer limits of Congress’ power, we expect a clear indication that Congress intended that result”). Assuming arguendo that there are two viable interpretations of § 3144, “the canon ... applies only when there are serious concerns about the statute’s constitutionality.” Harris v. United States, 536 U.S. 545, 555, 122 S.Ct. 2406, 153 L.Ed.2d 524 (2002) (citation omitted). The district court determined that “[i]mprisoning a material witness for a grand jury investigation raises a serious constitutional question” under the Fourth Amendment’s prohibition against unreasonable search and seizure. Awadallah III, 202 F.Supp.2d at 77. We respectfully disagree. As a threshold matter, the detention of material witnesses for the purpose of securing grand jury testimony has withstood constitutional challenge. In New York v. O’Neill, 359 U.S. 1, 79 S.Ct. 564, 3 L.Ed.2d 585 (1959), the Supreme Court considered “the constitutionality of a Florida statute entitled ‘Uniform Law to Secure the Attendance of Witnesses from Within or Without a State in Criminal Proceedings.’ ” Id. at 3, 79 S.Ct. 564. This statute — which had been adopted in 42 states and the Commonwealth of Puerto Rico— enabled a judge of one state to certify “the necessity of the appearance of [a] witness in a criminal prosecution or grand jury investigation,” and concomitantly enabled the state where that witness could be found to “take the witness into immediate custody” and “deliver the witness to an officer of the requesting State.” Id. at 4-5, 79 S.Ct. 564. The Court held that this statute did not violate the Privileges and Immunities Clause of the Fourteenth Amendment. Id. at 6-7, 79 S.Ct. 564. In doing so, it observed that “Florida undoubtedly could have held respondent within Florida if he had been a material witness in a criminal proceeding within that State.” Id. at 7, 79 S.Ct. 564. The Court observed that “[a] citizen cannot shirk his duty, no matter how inconvenienced thereby, to testify in criminal proceedings and grand jury investigations in a State where he is found. There is no constitutional provision granting him relief from this obligation to testify even though he must travel to another State to do so.” Id. at 11, 79 S.Ct. 564. The Supreme Court has made similar pronouncements in other cases. In Stein v. New York, 346 U.S. 156, 73 S.Ct. 1077, 97 L.Ed. 1522 (1953), overruled in part on other grounds by Jackson v. Denno, 378 U.S. 368, 84 S.Ct. 1774, 12 L.Ed.2d 908 (1964), the petitioners claimed that confessions were coerced by custodial interrogation and that their admission into evidence was unconstitutional. Id. at 159-60, 73 S.Ct. 1077. Even in the less august context of a police investigation (no grand jury had been convened), the Supreme Court observed that “[t]he duty to disclose knowledge of crime rests upon all citizens,” and that this duty “is so vital that one known to be innocent may be detained, in the absence of bail, as a material witness. This Court never has held that the Fourteenth Amendment prohibits a state from such detention and interrogation of a suspect as under the circumstances appears reasonable and not coercive.” Id. at 184, 73 S.Ct. 1077 (citing N.Y.Code Crim. Proc. § 618 — b; Fed.R.Crim.P. 46(b)); cf. Allen v. Nix, 55 F.3d 414, 415-17 (8th Cir.1995) (affirming denial of habeas relief to petitioner who claimed, among other things, that his detention on a state material witness warrant during a murder investigation violated the Fourth Amendment). Similarly, the Court has observed that the Senate has “the power in some cases to issue a warrant of arrest to compel” the “attendance of witnesses,” and that this power was “a necessary incident of the power to adjudge, in no wise inferior under like circumstances to that exercised by a court of justice.” Barry v. United States ex rel. Cunningham, 279 U.S. 597, 616, 49 S.Ct. 452, 73 L.Ed. 867 (1929). “[A] court has power in the exercise of a sound discretion to issue a warrant of arrest without a previous subpoena, when there is good reason to believe that otherwise the witness will not be forthcoming.” Id. at 616, 49 S.Ct. 452 (citing former 28 U.S.C. § 659). The Barry case made clear that it was saying nothing new: “The constitutionality of [28 U.S.C. § 659] apparently has never been doubted. Similar statutes exist in many of the states and have been enforced without question.” Id. at 617, 49 S.Ct. 452. This Court has likewise upheld the constitutionality of detaining grand jury witnesses under a New York material witness statute, former § 618-b of the New York Code of Criminal Procedure. In United States ex rel. Allen v. LaVallee, 411 F.2d 241 (2d Cir.1969), we upheld the admissibility of a confession obtained during the detention of a state grand jury witness under § 618-b. Id. at 244. We rejected the petitioner’s argument that “he was illegally detained as a material witness, because there was no criminal action or proceeding then pending, as required by § 618-b;” the grand jury proceeding and the ongoing police investigation were enough. Id. at 243. We reached a similar conclusion in United States ex rel. Glinton v. Denno, 309 F.2d 543 (2d Cir.1962) (“Glinton I”), which rejected a constitutional challenge to the admission of statements obtained while the petitioner was detained as a material witness for a state grand jury investigation. Although the New York material witness statute “require[d] a criminal action or proceeding to be pending in some New York court,” we held that this requirement was satisfied by the grand jury investigation under way at the time of Glinton’s arrest, id. at 544, observing that such statutes “appear to be fairly common and to have been enforced without question.” Id. Glinton’s Fourth Amendment claim, based on his detention for two weeks after the grand jury was discharged, was procedurally untenable in Glinton I, but was fully considered in United States ex rel. Glinton v. Denno, 339 F.2d 872 (2d Cir.1964) (“Glinton II”). In Glinton II, we saw “no reason to reverse our earlier holding that ... [Glinton’s] initial commitment, in lieu of bail, on November 13 as a material witness was lawful .... There cannot be any doubt that Glinton was validly committed as a material witness.” Id. at 874-75 (citation omitted). We continued: [T]he district attorney easily could have preserved the legality of Glinton’s detention by keeping the grand jury proceeding alive or by commencing a new one.... Assuming that Glinton’s presence as a material witness was still necessary, this continued detention would not have violated the Fourth Amendment. It cannot seriously be urged, therefore, that a detention which has been proper in all respects becomes vio-lative of the Constitution merely upon a technicality, the discharging of the grand jury. Id. at 876. The district court failed to account for these cases in detecting a constitutional problem in the detention of a material witness, and focused instead on developing its own Fourth Amendment analysis. Even meeting the district court decision on those terms, we see no serious constitutional problem that would warrant the exclusion of grand jury proceedings from the scope of § 3144. The Fourth Amendment prohibits “unreasonable searches and seizures.” U.S. Const, amend. IV. Determining the reasonableness of a seizure involves a balancing of competing interests: The essential purpose of the proscriptions in the Fourth Amendment is to impose a standard of “reasonableness” upon the exercise of discretion by government officials, including law enforcement agents, in order “to safeguard the privacy and security of individuals against arbitrary invasions ....” Thus, the permissibility of a particular law enforcement practice is judged by balancing its intrusion on the individual’s Fourth Amendment interests against its promotion of legitimate governmental interests. Delaware v. Prouse, 440 U.S. 648, 653-54, 99 S.Ct. 1391, 59 L.Ed.2d 660 (1979) (citations and footnotes omitted); see also Michigan v. Summers, 452 U.S. 692, 700 n. 12, 101 S.Ct. 2587, 69 L.Ed.2d 340 (1981) (“ ‘[T]he key principle of the Fourth Amendment is reasonableness — the balancing of competing interests.’ ”) (quoting Dunaway, 442 U.S. at 219, 99 S.Ct. 2248 (White, /., concurring)). Thus we must consider both “the nature and quality of the intrusion on the individual’s Fourth Amendment interests” and “the importance of the governmental interests alleged to justify the intrusion.” Tennessee v. Garner, 471 U.S. 1, 8, 105 S.Ct. 1694, 85 L.Ed.2d 1 (1985) (citing United States v. Place, 462 U.S. 696, 703, 103 S.Ct. 2637, 77 L.Ed.2d 110 (1983)). In its balancing analysis, the district court found that “[t]he only legitimate reason to detain a grand jury witness is to aid in ‘an ex parte investigation to determine whether a crime has been committed and whether criminal proceedings should be instituted against any person.’ ” Awadal-lah III, 202 F.Supp.2d at 77 (emphasis omitted) (quoting United States v. Calandra, 414 U.S. 388, 343-44, 94 S.Ct. 613, 38 L.Ed.2d 561 (1974)). This is no small interest. In United States v. Mandujano, 425 U.S. 564, 96 S.Ct. 1768, 48 L.Ed.2d 212 (1976), the Supreme Court explained: The grand jury is an integral part of our constitutional heritage which was brought to this country with the common law.... Indispensable to the exercise of its power is the authority to compel the attendance and the testimony of witnesses .... When called by the grand jury, witnesses are thus legally bound to give testimony. This principle has long been recognized. Id. at 571-72, 96 S.Ct. 1768 (citations omitted). “[I]t is clearly recognized that the giving of testimony and the attendance upon court or grand jury in order to testify are public duties which every person within the jurisdiction of the Government is bound to perform upon being properly summoned.” Blair v. United States, 250 U.S. 273, 281, 39 S.Ct. 468, 63 L.Ed. 979 (1919) (emphasis added). The district court noted (and we agree) that it would be improper for the government to use § 3144 for other ends, such as the detention of persons suspected of criminal activity for which probable cause has not yet been established. See Awa-dallah IV, 202 F.Supp.2d at 77 n. 28. However, the district court made no finding (and we see no evidence to suggest) that the government arrested Awadallah for any purpose other than to secure information material to a grand jury investigation. Moreover, that grand jury was investigating the September 11 terrorist attacks. The particular governmental interests at stake therefore were the indictment and successful prosecution of terrorists whose attack, if committed by a sovereign, would have been tantamount to war, and the discovery of the conspirators’ means, contacts, and operations in order to forestall future attacks. On the other side of the balance, the district court found in essence that § 3144 was not calibrated to minimize the intrusion on the liberty of a grand jury witness. See Awadallah III, 202 F.Supp.2d at 78-79. According to the district court, several procedural safeguards available to trial witnesses are not afforded in the grand jury context. See id. at 62-67, 78-79. We agree with the district court, of course, that arrest and detention are significant infringements on liberty, but we conclude that § 3144 sufficiently limits that infringement and reasonably balances it against the government’s countervailing interests. The first procedural safeguard to be considered is § 3144’s provision that “[n]o material witness may be detained because of inability to comply with any condition of release if the testimony of such witness can adequately be secured by deposition, and if further detention is not necessary to prevent a failure of justice.” 18 U.S.C. § 3144 (emphasis added). The district court agreed with the government that this deposition provision does not apply to grand jury witnesses. See Awadallah III, 202 F.Supp.2d at 78. The government’s altered position on appeal is that “Congress intended depositions to be available as a less restrictive alternative to detaining a grand jury witness.” (Appellant’s Reply Br. at 18.) Such a pivot by the government on appeal is awkward, but we accept the government’s explanation that it was persuaded by Chief Judge Mu-kasey’s view in In re Material Witness Warrant, 213 F.Supp.2d at 296. (Appellant’s Br. at 67-69; Appellant’s Reply Br. at 18-19.) We conclude that the deposition mechanism is available for grand jury witnesses detained under § 3144. At the time of Awadallah’s detention, the Federal Rule of Criminal Procedure that governs depositions provided: If a witness is detained pursuant to [§ 3144], the court on written motion of the witness and upon notice to the parties may direct that the witness’ deposition be taken. After the deposition has been subscribed the court may discharge the witness. Fed.R.Crim.P. 15(a) (1987). The district court is thereby authorized to order a deposition and to release the witness once it has been taken. Awadallah and the NYCDL argue that this provision cannot apply to grand jury witnesses because there can be no “party” or “trial” prior to indictment. (Appellee’s Br. at 43-46; NYCDL Br. at 10, 34-36.) The prosecutor and the witness may broadly be deemed parties, however, in the sense that each has interests to advance or protect before the grand jury. Thus, the rule governing the issuance of subpoenas — which indisputably applies during grand jury proceedings (Appellee’s Br. at 28) — refers to “the party requesting” a subpoena. Fed.R.Crim.P. 17(a). The district court found the deposition provision inapplicable in the grand jury context in part because a conventional deposition is inconsistent with the procedural and evidentiary rules of a grand jury hearing. See Awadallah III, 202 F.Supp.2d at 78. However, the district court may set additional conditions for the conduct of a deposition. Compare Fed.R.Crim.P. 15(d) (1987) (“[s]ubjeet to such additional conditions as the court shall provide”), with Fed.R.Crim.P. 15(e) (2003) (“[ujnless these rules or a court order provides otherwise”). The court thus can limit the deposition according to grand jury protocol, for example by limiting the witness’s right to have counsel present during the deposition or by permitting the use of hearsay. Rule 46 of the Federal Rules of Criminal Procedure, which governs detention and release, further supports the view that depositions are available to grand jury witnesses detained under § 3144. The version of Rule 46 in effect at the time of Awadallah’s detention provided that “[t]he attorney for the government shall make a biweekly report to the court listing each defendant and witness who has been held in custody pending indictment, arraignment or trial for a period in excess of ten days,” and as to “each witness so listed,” state “the reasons why such witness should not be released with or without the taking of a deposition pursuant to Rule 15(a).” Fed.R.Crim.P. 46(g) (1993) (emphasis added). The new version of the rule, which omits the reference to defendants, is even more explicit: An attorney for the government must report biweekly to the court, listing each material witness held in custody for more than 10 days pending indictment, arraignment, or trial. For each material witness listed in the report, an attorney for the government must state why the witness should not be released with or without a deposition being taken under Rule 15(a). Fed.R.Crim.P. 46(h)(2) (2003) (emphasis added). Both versions of the rule expressly contemplate the deposition of a “witness held in custody ... pending indictment.” Id. It follows that the deposition mechanism of § 3144 is a safeguard available to grand jury witnesses. The second procedural safeguard at issue is § 3144’s express invocation of the bail and release provisions set forth in 18 U.S.C. § 3142. Section 3144 directs that “a judicial officer may ... treat the [detained] person in accordance with the provisions of section 3142 of this title.” 18 U.S.C. § 3144. As noted above, § 3142 sets conditions for the “[r]elease or detention of a defendant pending trial,” as follows: Upon the appearance before a judicial officer of a person charged with an offense, the judicial officer shall issue an order that, pending trial, the person be — (1) released on personal recognizance or upon execution of an unsecured appearance bond ...; (2) released on a condition or combination' of conditions ...; (3) temporarily detained to permit revocation of conditional release, deportation, or exclusion ...; or (4) detained 18 U.S.C. § 3142(a). As the district court observed, some of the terms used in § 3142 — namely, “a person charged with an offense” and “pending trial” — do not comport with the structure of grand jury proceedings. However, we do not deduce (as the district court did) that “it is plain that section 3142 cannot apply to grand jury proceedings.” Awadallah III, 202 F.Supp.2d at 63. We agree with Chief Judge Mukasey that the provisions of § 3142 govern insofar as they are applicable in the grand jury setting: [T]he common sense reading of section 3144 is that it refers to section 3142 only insofar as that section is applicable to witnesses, in making available such alternatives to incarceration as release on bail or on conditions, in suggesting standards such as risk of flight, likelihood that the person will appear, and danger to the community, and in providing for a detention hearing. Not every provision of section 3142 applies to witnesses, but some do, and those govern. In re Material Witness Warrant, 213 F.Supp.2d at 295. Thus, a person detained as a material witness in a grand jury investigation may obtain a hearing on the propriety of his continued detention and the conditions, if any, which will allow his release. The district court also observed that the closed nature of a grand jury investigation limits the court’s ability to assess the materiality of a witness’s testimony. See Awadallah III, 202 F.Supp.2d at 63. This may be true at the margins, because the materiality of the testimony given by a trial witness can be assessed on the basis of the indictment, discovery materials, and trial evidence, whereas grand jury secrecy requires the judge to rely largely on the prosecutor’s representations about the scope of the investigation and the materiality of the witness’s testimony. However, as Chief Judge Mukasey observed, “courts make similar determinations all the time, based on sealed submissions, when deciding whether a subpoena calls for relevant information, whether such information is privileged, and the like.” In re Material Witness Warrant, 213 F.Supp.2d at 294 (noting that “I’ve done it myself’). Moreover, “the hypothesized difficulty of the materiality decision can be just as great, or greater, when a court must determine if a trial witness must be detained, because the decision likely will have to be made before the trial begins and thus before it is possible to fit the witness’s testimony into the grid of other evidence.” Id. at 294-95. The materiality determination called for by § 3144 lies within the district court’s competence. Finally, Awadallah and the NYCDL argue that § 3144 provides no limit on how long a grand jury witness may be detained, whereas the detention of a trial witness is implicitly limited (or speeded) by the time limits on prosecution contained in the Speedy Trial Act, 18 U.S.C. § 3161 et seq. (Appellee’s Br. at 55; NYCDL Br. at 27-31.) However, the Speedy Trial Act permits delay for various reasons, see 18 U.S.C. § 3161(h), which may have the collateral effect of extending the detention of a material witness; and nothing in the Speedy Trial Act requires a court to consider the effect of a continuance or delay on a detained witness. The Act therefore provides cold comfort to a detained trial witness. While § 3144 contains no express time limit, the statute and related rules require close institutional attention to the propriety and duration of detentions: “[n]o material witness may be detained because of inability to comply with any condition of release if the testimony of such witness can adequately be secured by deposition, and if further detention is not necessary to prevent a failure of justice.” 18 U.S.C. § 3144. The court must “treat the person in accordance with the provisions of section 3142,” which provides a mechanism for release. Id. And release may be delayed only “for a reasonable period of time until the deposition of the witness can be taken pursuant to the Federal Rules of Criminal Procedure.” Id. Perhaps most important, Rule 46 requires the government to make a “biweekly report” to the court listing each material witness held in custody for more than ten days and justifying the continued detention of each witness. Fed.R.Crim.P. 46(g) (1993); see also Fed.R.Crim.P. 46(h)(2) (2003). These measures tend to ensure that material witnesses are detained no longer than necessary. In light of the foregoing analysis, we must ask whether Awadallah was properly detained when he was held for several weeks without being allowed to give his deposition and obtain release. Such a detention constitutes a significant intrusion on liberty, since a material witness can be arrested with little or no notice, transported across the country, and detained for several days or weeks. Under the circumstances of this case, however, we are satisfied that Awadallah’s detention was not unreasonably prolonged. As indicated above, the deposition mechanism invoked in § 3144 is available to grand jury witnesses, but it is not required in every instance. Section 3144 requires release after deposition only if “the testimony of such witness can adequately be secured by deposition” and “further detention is not necessary to prevent a failure of justice.” 18 U.S.C. § 3144 (emphasis added). Similarly, § 3142 provides that a person may be detained if, “after a hearing ..., the judicial officer finds that no condition or combination of conditions will reasonably assure the appearance of the person as required and the safety of any other person and the community.” 18 U.S.C. § 3142(e). The procedural history demonstrates that Awadallah received adequate process to ensure that the duration of his detention was reasonable. Awadallah was arrested on Friday, September 21, 2001. He first appeared before a magistrate judge in San Diego for a bail hearing on Monday, September 24. That hearing was adjourned until the following day in order for Awa-dallah’s counsel to obtain a translator. When Awadallah appeared before the magistrate judge the next day, the court received testimony from his witnesses and heard argument from counsel. Awadal-lah’s attorney argued, among other things, that a deposition should be taken pursuant to § 3144. The court found that, under § 3142, there were no conditions of release that would reasonably assure Awadallah’s appearance before the grand jury. The court denied bail and ordered that Awadal-lah be removed to New York. The government transported Awadallah across the country, and he arrived in New York on Monday, October 1. The next day, he appeared for a se