Full opinion text
Reversed and remanded by published opinion. Judge WILLIAMS wrote the opinion, in which Senior Judge KISER joined. Judge MICHAEL wrote an opinion concurring in part and dissenting in part. OPINION WILLIAMS, Circuit Judge: In response to the Supreme Court’s decision in Miranda v. Arizona, 384 U.S. 436, 86 S.Ct. 1602, 16 L.Ed.2d 694 (1966), the Congress of the United States enacted 18 U.S.C.A. § 3501 (West 1985), with the clear intent of restoring voluntariness as the test for admitting confessions in federal court. Although duly enacted by the United States Congress and signed into law by the President of the United States, the United States Department of Justice has steadfastly refused to enforce the provision. In fact, after initially “taking the Fifth” on the statute’s constitutionality, the Department of Justice has now asserted, without explanation, that the provision is unconstitutional. With the issue squarely presented, we hold that Congress, pursuant to its power to establish the rales of evidence and procedure in the federal courts, acted well within its authority in enacting § 3501. As a consequence, § 3501, rather than Miranda,'governs the admissibility of confessions in federal court. Accordingly, the district court erred in suppressing Dickerson’s voluntary confession on the grounds that it was obtained in technical violation of Miranda. I. On January 27,1997, Charles T. Dickerson confessed to robbing a series of banks in Maryland and Virginia. Dickerson was subsequently indicted by a federal grand jury on one count of conspiracy to commit bank robbery in violation of 18 U.S.C.A. § 371 (West Supp.1998), three counts of bank robbery in violation of 18 U.S.C.A. § 2113(a) & (d) (West Supp.1998), and three counts of using a firearm during and in relation to a crime of violence in violation of 18 U.S.C.A. § 924(c)(1) (West Supp.1998). Shortly thereafter, Dickerson moved to suppress his confession. Although the district court specifically found that Dickerson’s confession was voluntary for purposes of the Fifth Amendment, it nevertheless suppressed the confession because it was obtained in technical violation of Miranda. In ruling on the admissibility of Dickerson’s confession, the district court failed to consider § 3501, which provides, in pertinent part, that “a confession ... shall be admissible in evidence if it is voluntarily given.” 18 U.S.C.A. § 3501(a). Based upon the statutory language, it is evident that Congress enacted § 3501 with the express purpose of legislatively overruling Miranda and restoring voluntariness as the test for admitting confessions in federal court. Thus, if Congress possessed the authority to enact § 3501, Dickerson’s voluntary confession is admissible as substantive evidence in the Government’s case-in-chief. Congress enacted § 3501 as a part of the Omnibus Crime Control Act of 1968, just two years after the Supreme Court decided Miranda. Although the Supreme Court has referred to § 3501 as “the statute governing the admissibility of confessions in federal prosecutions,” United States v. Alvarez-Sanchez, 511 U.S. 350, 351, 114 S.Ct. 1599, 128 L.Ed.2d 319 (1994), the Court has never considered whether the statute overruled Miranda, see Davis v. United States, 512 U.S. 452, 457 n. *, 114 S.Ct. 2350, 129 L.Ed.2d 362 (1994). Indeed, although several lower courts have found that § 3501, rather than Miranda, governs the admissibility of confessions in federal court, see United States v. Crocker, 510 F.2d 1129, 1137 (10th Cir.1975); United States v. Rivas-Lopez, 988 F.Supp. 1424, 1430-36 (D.Utah 1997), no Administration since the provision’s enactment has pressed the point, see Davis, 512 U.S. at 463-64, 114 S.Ct. 2350 (Scalia, J., concurring) (noting that “the provision has been studiously avoided by every Administration ... since its enactment more than 25 years ago”); see also U.S. Dep’t of Justice, Report to Attorney General on Law of Pre-Trial Interrogation 72-73 (1986) (discussing “[t]he abortive implementation of § 3501” after its passage in 1968). In fact, after initially declining to take a position on the applicability of § 3501, see Davis, 512 U.S. at 457, 114 S.Ct. 2350, the current Administration has now asserted, without explanation, that the provision is unconstitutional, see Letter from Janet Reno, Attorney General, to Congress (Sept. 10, 1997). Recently, Justice Scalia expressed his concern with the Department of Justice’s failure to enforce § 3501. See Davis, 512 U.S. at 465, 114 S.Ct. 2350 (Scalia, J., concurring). In addition to “caus[ing] the federal judiciary to confront a host of ‘Miranda’ issues that might be entirely irrelevant under federal law,” id., Justice Scalia noted that the Department of Justice’s failure to invoke the provision “may have produced — during an era of intense national concern about the problem of run-away crime — the acquittal and the nonprosecution of many dangerous felons,” id. This is just such a case. Dickerson voluntarily confessed to participating in a series of armed bank robberies. Without his confession it is possible, if not probable, that he will be acquitted. Despite that fact, the Department of Justice, elevating politics over law, prohibited the U.S. Attorney’s Office from arguing that Dickerson’s confession is admissible under the mandate of § 3501. Fortunately, we are a court of law and not politics. Thus, the Department of Justice cannot prevent us from deciding this case under the governing law simply by refusing to argue it. See United States Nat’l Bank of Or. v. Independent Ins. Agents of America, Inc., 508 U.S. 439, 445-48, 113 S.Ct. 2173, 124 L.Ed.2d 402 (1993). Here, the district court has suppressed a confession that, on its face, is admissible under the mandate of § 3501, i.e., the confession was voluntary under the Due Process Clause, but obtained in technical violation of Miranda. Thus, the question of whether § 3501 governs the admissibility of confessions in federal court is squarely before us today. Determining whether Congress possesses the authority to enact § 3501 is relatively straightforward. Congress has the power to overrule judicially created rules of evidence and procedure that are not required by the Constitution. See Carlisle v. United States, 517 U.S. 416, 426, 116 S.Ct. 1460, 134 L.Ed.2d 613 (1996); Palermo v. United States, 360 U.S. 343, 345-48, 79 S.Ct. 1217, 3 L.Ed.2d 1287 (1959). Thus, whether Congress has the authority to enact § 3501 turns on whether the rule set forth by the Supreme Court in Miranda is required by the Constitution. Clearly it is not. At no point did the Supreme Court in Miranda refer to the warnings as constitutional rights. Indeed, the Court acknowledged that the Constitution did not require the warnings, 384 U.S. at 467, 86 S.Ct. 1602, disclaimed any intent to create a “constitutional straightjacket,” id., referred to the warnings as “procedural safeguards,” id. at 444, 86 S.Ct. 1602, and invited Congress and the States “to develop their own safeguards for [protecting] the privilege,” id. at 490, 86 S.Ct. 1602. Since deciding Miranda, the Supreme Court has consistently referred to the Miranda warnings as “prophylactic,” New York v. Quarles, 467 U.S. 649, 654, 104 S.Ct. 2626, 81 L.Ed.2d 550 (1984), and “not themselves rights protected by the Constitution,” Michigan v. Tucker, 417 U.S. 433, 444, 94 S.Ct. 2357, 41 L.Ed.2d 182 (1974). We have little difficulty concluding, therefore, that § 3501, enacted at the invitation of the Supreme Court and pursuant to Congress’s unquestioned power to establish the rules of procedure and evidence in the federal courts, is constitutional. As a consequence, we hold that the admissibility of confessions in federal court is governed by § 3501, rather than the judicially created rule of Miranda. II. Because of the unique posture of this case, 1.e., an interlocutory appeal from the denial of a motion to reopen a suppression hearing, and the significant legal questions raised therein, we have set forth the factual background and the procedural history in painstaking detail. Although rather lengthy, we believe that it is helpful in understanding the important legal issues that must be addressed. On January 24, 1997, an individual using a silver semi-automatic handgun and carrying a black leather bag robbed the First Virginia Bank in Old Town, Alexandria, Virginia, of approximately $876. An eyewitness saw the robber exit the bank, run down the street, and get into a white Oldsmobile Ciera with District of Columbia license plate number D5286. Within seconds, the robber exited the car, placed something in the trunk, and then re-entered the car on the passenger side. The car then drove away. The subsequent investigation into the bank robbery revealed that the getaway car was registered to Charles T. Dickerson of Tako-ma Park, Maryland. On January 27, 1997, approximately ten FBI agents and an Alexandria police detective (the agents) traveled to Dickerson’s Takoma Park address. Upon arrival, the agents noticed a white Oldsmobile Ciera with D.C. license plate number D5286 parked on the street in front of Dickerson’s apartment. Special Agent Christopher Lawlor knocked on Dickerson’s door and identified himself. After some delay, Dickerson opened the door. Special Agent Lawlor informed Dickerson that the agents were investigating a bank robbery. Although the parties dispute whether the agents had consent to enter Dickerson’s apartment, there is no dispute that several agents did, in fact, do so. After a short conversation, Special Agent Lawlor asked Dickerson if he would accompany them to the FBI Field Office in Washington, D.C. Dickerson agreed, but requested that he be allowed to retrieve his coat from his bedroom. As Dickerson picked up his coat, Special Agent Lawlor noticed a large amount of cash on the bed. After placing the money in his coat pocket, Dickerson told the agents that it was gambling proceeds from Atlantic City. After denying the agents’ request to search his apartment, Dickerson rode with the agents to the FBI Field Office. Dickerson was not formally placed under arrest and was not handcuffed. Several agents, including Agent Lawrence Wenko, remained in the vicinity of Dickerson’s apartment. At the FBI Field Office, Dickerson was interviewed by Special Agent Lawlor and Detective Thomas Durkin of the Alexandria Police Department. Dickerson denied any involvement in the robbery, but admitted that he had driven to Old Town on the morning in question to look at a restaurant. While in the vicinity of the First Virginia Bank, Dickerson claims that he ran into an old friend named Terrance, who asked for a ride to Suitland, Maryland. Dickerson agreed, and drove Terrance to Suitland, where he dropped Terrance off near a liquor store. Special Agent Lawlor left the interview room and called United States Magistrate Judge James E. Kenkel to obtain a warrant to search Dickerson’s apartment. Based upon the tape-recorded conversation between Special Agent Lawlor and Judge Kenkel, it is undisputed that Special Agent Lawlor described the circumstances of the robbery, including that the robber used a handgun, carried a bag, requested unmarked bills, and left the scene in a car registered to Dickerson. In addition, Special Agent Lawlor noted that Dickerson had over $550 in cash when picked up, had just that day paid.his landlord $1350 to cover back rent, and had admitted that he was near the bank at the time of the robbery. Finally, Special Agent Lawlor explained that he was seeking a telephonic warrant because Dickerson was not under arrest and could easily go home and destroy any evidence of the bank robbery. Based upon Special Agent Lawlor’s sworn statement, Judge Kenkel stated that he was convinced “that there is probable cause to believe at that residence there may be ... evidence of the bank robbery in question.” (J.A. at 69.) In the section of the warrant used to identify the property to be seized, Special Agent Lawlor wrote: “Evidence of the crime of bank robbery.” (J.A. at 66.) In the section of the warrant used to identify the time issued, Special Agent Lawlor wrote: “8:50 p.m.” (J.A. at 66.) Special Agent Lawlor then called Agent Wenko, who had remained in the vicinity of Dickerson’s apartment, to inform him that a warrant had been issued authorizing the agents to search Dickerson’s apartment for evidence of the First Virginia Bank robbery. Immediately after being notified about the warrant, Agent Wenko and a team of agents proceeded to search Dickerson’s apartment. After returning to the interview room, Special Agent Lawlor told Dickerson that agents were about to search his apartment. At some point thereafter, Dickerson informed Special Agent Lawlor and Detective Durkin that he wished to make a statement. In his statement, Dickerson admitted to being the getaway driver in a series of bank robberies. Dickerson then identified Jimmy Rochester as the actual bank robber. Of particular importance to this case, Dickerson told the agents that on January 24, 1997, the pair drove to Old Town, Alexandria. Dickerson admitted that he stopped the car near the First Virginia Bank, that Rochester got out of the car, that Rochester returned a short while later and placed something in the trunk, that Rochester got back in the car, and that the pair drove away. Dickerson also told the agents that Rochester gave him a silver handgun and some dye-stained money that Rochester feared the police might find in his apartment. Following these statements, Dickerson was placed under arrest. As a result of Dickerson’s confession, Rochester was apprehended by the police and placed under arrest. At that time, Rochester admitted to robbing eleven banks in Georgia, three banks in Virginia (including the First Virginia Bank in Old Town, Alexandria), four banks in Maryland, and an armored car in Maryland. Of particular importance here, Rochester stated that Dickerson was his getaway driver in each of the Maryland and Virginia bank robberies. The search of Dickerson’s apartment produced a silver .45 caliber handgun, dye-stained money, a bait bill from another robbery, ammunition, masks, and latex gloves. The agents also found a small quantity of drugs in plain view. A subsequent warrant-authorized search of Dickerson’s Oldsmobile Ciera produced a black leather bag and solvent used to clean dye-stained money. Based upon his confession, Rochester’s statements, and the aforementioned physical evidence discovered during the searches of his apartment and car, Dickerson was indicted by a federal grand jury on one count of conspiracy to commit bank robbery in violation of 18 U.S.C.A. § 371 (West Supp.1998), on three counts of bank robbery in violation of 18 U.S.C.A. § 2113(a) and (d) (West Supp. 1998), and on three counts of using a firearm during and in relation to a crime of violence in violation of 18 U.S.C.A. § 924(c)(1) (West Supp.1998). On May 19, 1997, Dickerson filed a motion to suppress (1) the statements he made at the FBI Field Office; (2) the evidence found as a result of his statements; (3) the physical evidence obtained during the search of his apartment; and (4) the physical evidence obtained during the search of his car. The Government submitted a brief in opposition to the motion to suppress. Several days later, the Government supplemented its brief in opposition. A hearing on the motion to suppress was held in the United States District Court for the Eastern District of Virginia on May 30,1997. At the suppression hearing, the Government relied exclusively upon the testimony of Special Agent Lawlor. Among other things, Special Agent Lawlor testified that Dickerson was read (and waived) his rights under Miranda prior to his confession. Of particular importance here, Special Agent Lawlor testified that Dickerson confessed “shortly after” he obtained the warrant to search Dickerson’s apartment. In contrast, Dickerson testified that he confessed prior to being read (and waiving) his Miranda rights and about thirty minutes after being informed about the warrant to search his apartment. The advice-of-rights form indicates that Dickerson waived his Miranda rights at 9:41 p.m. (J.A. at 72.) After the hearing, the district court asked the parties to submit supplemental briefs in support of their respective positions. The Government filed a supplemental memorandum on June 3, 1997. On July 1, 1997, the district court issued an Order and Memorandum Opinion. The district court, among other things, suppressed Dickerson’s statement implicating himself and Rochester in the First Virginia Bank robbery, finding that it was made while he was in police custody, in response to police interrogation, and without the necessary Miranda warnings. In so holding, the district court found that Dickerson’s in-court testimony was more credible than that of Special Agent Lawlor. This finding rested, in part, upon the fact that Special Agent Lawlor’s testimony — that he read Dickerson his Miranda warnings “shortly after” obtaining the warrant — was contradicted by the warrant (issued at “8:50 p.m.”) and the advice-of-rights form (executed at “9:41 p.m.”). Because the documentary evidence undermined Special Agent Lawlor’s credibility (and supported Dickerson’s testimony, i.e., he was read his Miranda rights about thirty minutes after being told about the warrant), the district court found that “Dickerson was not advised of his Miranda rights until after he had completed his statement to the government.” (J.A. at 98.) Although the district court suppressed the statement obtained in violation of Miranda, it nevertheless denied Dickerson’s motion to suppress the evidence found as a result thereof, e.g., the statement made by Rochester identifying Dickerson as the getaway driver. The district court, relying upon this Court’s decision in United States v. Elie, 111 F.3d 1135 (4th Cir.1997), noted that evidence found as a result of a statement made in violation of Miranda may only be suppressed if the statement was involuntary within the meaning of the Due Process Clause of the Fifth Amendment. Because Dickerson’s statement was voluntary under the Fifth Amendment, the district court concluded that the evidence found as a result thereof was admissible at trial. The district court did, however, suppress the physical evidence discovered during the search of Dickerson’s apartment on January 27, 1997. The district court concluded that the warrant was insufficiently particular in describing the items to be seized. Moreover, the district court concluded that the good-faith exception to the exclusionary rule was inapplicable because the agents “[executing the [w]arrant [a]cted in [b]ad [f]aith” by relying upon a warrant that was so facially deficient. (J.A. at 91.) Finally, the district court denied Dickerson’s motion to suppress the evidence discovered in the trunk of his car. The district court found that the warrant to search Dickerson’s car, unlike the warrant to search his apartment, was sufficiently particular in describing the items to be seized. Moreover, the district court found that the search of the car was supported by the eyewitness accounts of the bank robbery. On July 15, 1997, the Government filed a motion asking the district court to reconsider its Order suppressing the statements made by Dickerson at the FBI Field Office and the physical evidence found during the search of Dickerson’s apartment. The Government’s motion included affidavits from Detective Durkin and Agent Wenko, and a statement written by Dickerson while at the FBI Field Office. In addition, the Government argued that because Dickerson’s statements were voluntary, they were nonetheless admissible under the mandate of 18 U.S.C.A. § 3501 (West 1985). Detective Durkin, who was in the interview room with Dickerson at all times, stated in his affidavit that “Dickerson was read his Miranda rights before he made th[e] statements” impheating himself and Rochester in the First Virginia Bank robbery. (J.A. at 121.) Detective Durkin explained that after Special Agent Lawlor returned to the interview room to announce that they were going to search Dickerson’s apartment, Special Agent Lawlor immediately departed. According to Detective Durkin, it was not until Special Agent Lawlor returned some time later that they read Dickerson his Miranda warnings. In fact, Detective Durkin testified that when Dickerson was read his Miranda rights he still denied any involvement in the bank robbery. According to Detective Dur-kin, it was not until Dickerson was told that agents had found a bait bill from a bank robbery in his apartment that he decided to confess. Attached to Detective Durkin’s affidavit was a hand-written statement that Dickerson made while at the FBI Field Office in which he stated that he “was read [his] rights at 7:30 [p.m.]” (J.A. at 123.) In addition, Dickerson wrote in the statement that he knew “nothing [about] the bank robbery” in question. (J.A. at 123.) Thus, according to his own hand-written note, Dickerson was read his Miranda warnings prior to implicating himself and Rochester in the First Virginia Bank robbery. Finally, Agent Wenko’s affidavit contradicted, among other things, the district court’s finding that the agents who executed the search of Dickerson’s apartment acted in bad faith. Agent Wenko, who was the lead agent during the search of Dickerson’s apartment, stated that he was familiar with the specifics of the bank robbery in question and knew what specific evidence to look for. In addition, Agent Wenko stated that he had been investigating bank robberies for seven years and was very familiar with the type of evidence customarily associated with bank robberies, e.g., guns, money, bait bills, dye-stained money and clothes, disguises, carrying bags, and gloves. On August 4, 1997, the district court denied the Government’s motion for reconsideration. See United States v. Dickerson, 971 F.Supp. 1023 (E.D.Va.1997). Noting that no provision in the Federal Rules of Criminal Procedure governed motions for reconsideration, the district court used the standard set forth in Rule 59(e) of the Federal Rules of Civil Procedure as its guide. See id. at 1024. In so doing, the district court rejected the Government’s motion for reconsideration upon the ground that the Government failed to establish that “the evidence., was unavailable at the time of the hearing.” Id. This interlocutory appeal followed. III. Before determining whether Congress possesses the authority to enact § 3501, we must first consider whether the district court erred in refusing to entertain the Government’s motion for reconsideration. Although a case of first impression in this Court, our sister circuits review a district court’s refusal to reopen a suppression hearing for abuse of discretion. See, e.g., United States v. Hassan, 83 F.3d 693, 696 (5th Cir.1996); United States v. Roberts, 978 F.2d 17, 20 (1st Cir.1992); United States v. Buffington, 815 F.2d 1292, 1298 (9th Cir.1987). We adopt that standard here. Under an abuse of discretion standard, a reviewing court may not substitute its judgment for that of the district court. See, e.g., United States v. Mason, 52 F.3d 1286, 1289 (4th Cir.1995). Indeed, an appeals court may uphold the exercise of a district court’s discretion even where it might have ruled differently on the matter in the first instance. Instead, our task is simply to determine whether the district court’s exercise of discretion was arbitrary or capricious in light of the governing law and the facts. See, e.g., id. In its motion for reconsideration, the U.S. Attorney’s Office asked the district court to reverse its suppression rulings on two grounds. First, the Government presented the district court with additional evidence that corroborated Special Agent Lawlor’s testimony concerning when Dickerson was read his- Miranda warnings. Second, the Government argued that even if Dickerson’s confession was elicited in technical violation of Miranda, it was nevertheless admissible under 18 U.S.C.A. § 3501 (West 1985). We address each ground in turn. A. Relying upon Rule 59(e) of the Federal Rules of Civil Procedure, the district court rejected the Government’s motion for reconsideration because the Government failed to establish that “the evidence ... was unavailable at the time of the hearing.” United States v. Dickerson, 971 F.Supp. 1023, 1024 (E.D.Va.1997). The Government actually conceded, as it does on appeal, that the evidence forming the basis for its motion was available at the time of the suppression hearing. The Government explains, however, that the evidence was not introduced because (1) it never believed that the district court would find Dickerson more believable than Special Agent Lawlor; and (2) it did not want to burden the district court with cumulative evidence. As an initial matter, although Rule 59(e) of the Federal Rules of Civil Procedure requires a showing that the evidence supporting a motion for reconsideration was not available at the time of the initial hearing, see Hutchinson v. Staton, 994 F.2d 1076, 1081 (4th Cir.1993), the Federal Rules of Civil Procedure are not binding in criminal proceedings. As a result, that evidence was available to the movant prior to the suppression hearing does not, as a matter of law, defeat a motion for reconsideration in a criminal case. See, e.g., United States v. Regilio, 669 F.2d 1169, 1177 (7th Cir.1981) (recognizing that “society’s interest in admitting all relevant evidence militates strongly in favor of permitting reconsideration”). We also recognize, however, that the district court has a strong interest in controlling its docket and avoiding piecemeal litigation. Thus, when the evidence forming the basis for a party’s motion for reconsideration was in the movant’s possession at the time of the initial hearing, as was the case here, the movant must provide a legitimate reason for failing to introduce that evidence prior to the district court’s ruling on the motion to suppress before we will determine that a district court abused its discretion in refusing to reconsider its suppression ruling. Before considering the Government’s reasons for failing to introduce the evidence in question, however, we note that it was given numerous opportunities to introduce the evidence prior to the district court’s ruling on the suppression motion. Dickerson’s motion to suppress was filed on May 19, 1997. On May 23, 1997, the Government filed a response to Dickerson’s motion to suppress. Four days later, the Government supplemented its response. A hearing on the motion was held on May 30, 1997. Finally, at the district court’s request, the Government was given yet another opportunity to file an additional supplemental memorandum in support of its position on June 3, 1997. At none of these junctures did the Government introduce the two affidavits and the statement. In light of the ample opportunities the Government had to introduce the evidence in question prior to the district court’s ruling on the motion to suppress, its articulated reasons for failing to do so ring hollow. First, the Government contends that it never believed that the district court would find Dickerson more credible than Special Agent Law-lor. Even if this explanation was tenable prior to the suppression hearing, Special Agent Lawlor’s testimony on the primary issue in dispute, ie., whether Dickerson was read his Miranda warnings prior to his confession, was completely undermined by the Government’s own documentary evidence, which supported Dickerson’s version of events. After the hearing, therefore, the Government should have been firmly disabused of any misconceptions concerning whom the district court would find more credible. Because the Government was given the opportunity to file a supplemental memorandum after the hearing, the Government’s failure to introduce the affidavits of Detective Durkin and Agent Wenko and the statement written by Dickerson cannot be explained by its first justification. Next, the Government contends that it did not want to burden the district court with cumulative evidence. What the Government means by cumulative evidence is not entirely clear. Because every additional piece of evidence offered is, by definition, cumulative, cumulative evidence is not bad per se. Indeed, under the Federal Rules of Evidence it is the “needless presentation of cumulative evidence” that is to be avoided. Fed.R.Evid. 403. With that understanding, the Government’s argument necessarily assumes that Special Agent Lawlor’s testimony should have been sufficient and that any additional evidence would, in fact, be needlessly cumulative. For the reasons stated above, however, the Government should have known after the hearing that additional evidence was not needlessly cumulative, but absolutely necessary. In any event, why the Government would consider the statement written by Dickerson-in which he admits that he was read his IVJ'irancta warnings prior to implicating himself in a series bf bank robberies-to be needlessly cumulative on the pivotal question of whether he was read his Miranda warnings prior to implicating himself in a series of bank robberies is difficult to understand. Evidence that is so probative that it would likely change the mind of the factfin-der is not needlessly cumulative. Cf. 22 Charles Alan Wright & Kenneth W. Graham, Jr., Federal Practice and Procedure § 5220, at 306 (1978) (noting similar principle under Rule 403). In sum, because the district court gave the Government the opportunity to introduce the affidavits of Detective Durkin and Agent Wenko and Dickerson’s hand-written statement after the suppression hearing, we conclude that the Government’s failure to do so cannot adequately be explained by its proffered reasons. Accordingly, we cannot say that the district court abused its discretion in denying the Government’s motion for reconsideration based upon its refusal to consider evidence that was in the Government’s possession at the time of the initial hearing. B. Because “[a] district court by definition abuses its discretion when it makes an error of law,” Koon v. United States, 518 U.S. 81, 116 S.Ct. 2035, 2047, 135 L.Ed.2d 392 (1996), we must address the Government’s second proffered ground for reconsideration of the suppression ruling, namely whether § 3501, rather than Miranda, governs the admissibility of Dickerson’s confession. 1. Whether 3501 or Miranda governs the admissibility of Dickerson’s confession ultimately turns on the answers to two questions. Does § 3501 purport to supersede the rule set forth by the Supreme Court in Miranda? If it does, does Congress possess the authority legislatively to overrule Miranda? Prior to addressing these questions, however, we feel compelled to respond to the dissent’s assertion that the question of § 3501’s applicability is not properly before us. Although raised by the Government in its motion for reconsideration, the applicability of § 3501 was not briefed by the Government on appeal. We note, however, that this was no simple oversight. The United States Department of Justice took the unusual step of actually prohibiting the U.S. Attorney’s Office from briefing the issue. To be sure, this was not an isolated incident. Over the last several years, the Department of Justice has not only failed to invoke § 3501, it has affirmatively impeded its enforcement. For example, in Davis v. United States, 512 U.S. 452, 114 S.Ct. 2350, 129 L.Ed.2d 362 (1994), which involved the defendant’s attempt to suppress an incriminating statement made after an ambiguous request for counsel, the Department of Justice expressly declined to take a position on the applicability of § 3501. See id. at 457 n. *, 114 S.Ct. 2350. As a result, the majority opinion declined to consider the issue. See id. (declining to reach issue because “we are reluctant to do so when the issue is one of first impression involving the interpretation of a federal statute on which the Department of Justice expressly declines to take a position”). Justice Sealia, in a concurring opinion, chided the Department of Justice for its failure to invoke § 3501: The United States’ repeated refusal to invoke § 3501, combined with the courts’ traditional (albeit merely prudential) refusal to consider arguments not raised, has caused the federal judiciary to confront a host of “Miranda ” issues that might be entirely irrelevant under federal law. Worse still, it may have produced — during an era of intense national concern about the problem of run-away crime — the acquittal and the nonprosecution of many dangerous felons, enabling them to continue their depredations upon our citizens. There is no excuse for this. Id. at 465, 114 S.Ct. 2350 (citations omitted). Justice Sealia further questioned whether the Department of Justice’s failure to invoke § 3501 was “consistent with the Executive’s obligation to ‘take Care that the Laws be faithfully executed.’ ” Id. (quoting U.S. Const. Art. II, § 3). Over the past few years, career federal prosecutors have tried to invoke § 3501 in this Court only to be overruled by the Department of Justice. In March of 1997, for example, the U.S. Attorney’s Office in Alexandria, Virginia, appealed the suppression of a statement that the district court found was obtained in technical violation of Miranda. See United States v. Sullivan, 138 F.3d 126 (4th Cir.1998). In its brief, the U.S. Attorney’s Office urged this Court to reverse the district court on the basis of § 3501. The Department of Justice, however, ordered the U.S. Attorney's Office to withdraw its brief. In its place, a brief without any reference to § 3501 was filed. As a result, the Washington Legal Foundation and the Safe Streets Coalition filed an amicus brief urging this Court to consider the admissibility of Sullivan’s confession under § 3501. Because we ultimately concluded that Sullivan was not in custody for Miranda purposes when the incriminating statements were made, we had no occasion to address the applicability of § 3501. See id. at 134 n. *. In June of 1997, this Court issued an opinion upholding the suppression of a confession obtained in technical violation of Miranda. See United States v. Leong, 116 F.3d 1474 (4th Cir.1997) (unpublished). Although the United States did not seek rehearing, the Washington Legal Foundation and the Safe Streets Coalition moved this Court for leave to proceed as amici curiae. In their motion, the putative amici took the Government to task’for failing to assert the applicability of § 3501. As a result, we ordered the Department of Justice to address the effect of § 3501 on the admissibility of Leong’s confession. In response, Attorney General Janet Reno, although purporting to follow the advice of her career prosecutors in other matters, notified Congress that the Department of Justice would not defend the constitutionality of § 3501, see 2 U.S.C.A. § 288k(b) (West 1997) (requiring the Department of Justice to notify the United States Congress whenever it will not defend the constitutionality of a federal statute), and filed with this Court a brief to the same effect. Against this background, the Government’s failure to raise the applicability of § 3501 on appeal in this case does not come as a surprise. Of even greater importance, neither does it prevent us from considering the applicability of § 3501 on appeal. Even where the parties abdicate their responsibility to call relevant authority to this Court’s attention, cf. Va.Code Prof. Resp. 7-20, they cannot prevent us from deciding the case under the governing law simply by refusing to argue it, see United States Nat’l Bank of Or. v. Independent Ins. Agents of America, Inc., 508 U.S. 439, 445-48, 113 S.Ct. 2173, 124 L.Ed.2d 402 (1993). Indeed, it is now well established that “the proper administration of the criminal law cannot be left merely to the stipulation of parties.” Young v. United States, 315 U.S. 257, 259, 62 S.Ct. 510, 86 L.Ed. 832 (1942). The dissent contends that “we are faced with essentially the same situation that the Supreme Court confronted in Davis when it refused to take up § 3501.” Post at 696. We disagree. Although the Supreme Court declined sua sponte to consider the applicability of § 3501 in Davis, 512 U.S. at 457 n. *, 114 S.Ct. 2350, that decision was influenced by prudential concerns not present here, id. at 465, 114 S.Ct. 2350 (Sealia, J., concurring) (noting that the Court’s decision not to consider the applicability of § 3501 was influenced by prudential concerns, rather than by statutory constraints on the Supreme Court’s jurisdiction). As a general matter, “a court should avoid deciding a constitutional question when it can dispose of a case on another basis.” Jimenez v. BP Oil, Inc., 853 F.2d 268, 270 (4th Cir.1988) (citing Ashwander v. Tennessee Valley Auth., 297 U.S. 288, 346, 56 S.Ct. 466, 80 L.Ed. 688 (1936) (Brandeis, J., concurring)). Having determined that the defendant’s ambiguous reference to an attorney during a custodial interrogation was not a request for counsel for purposes of Edwards v. Arizona, 451 U.S. 477, 484-85, 101 S.Ct. 1880, 68 L.Ed.2d 378 (1981), see Davis, 512 U.S. at 459, 114 S.Ct. 2350, the Court had no reason to consider whether the defendant’s confession was also admissible under the mandate of § 3501, especially because the Department of Justice had expressly declined to take a position on the provision’s constitutionality, see id. at 457 n. *, 114 S.Ct. 2350. Dickerson’s confession, in contrast, was obtained in violation of Miranda. Thus, unlike the situation in Davis, we cannot avoid deciding the constitutional question associated with § 3501. Moreover, and again unlike the situation in Davis, the Department of Justice has now taken the position that § 3501 is unconstitutional. See Letter from Janet Reno, Attorney General, to Congress (Sept. 10, 1997) (notifying Congress that the Department of Justice will not defend the constitutionality of the statute). As a result, the specific prudential concerns that animated the Supreme Court’s decision not to consider the applicability of § 3501 in Davis are simply not present here. Furthermore, the primary reason for the Supreme Court’s general reluctance to consider arguments not raised is not applicable to inferior federal courts such as this one. The Supreme Court “sits as a court of review.” Duignan v. United States, 274 U.S. 195, 200, 47 S.Ct. 566, 71 L.Ed. 996 (1927). Thus, it generally will not consider issues “not pressed or passed upon below.” Id.; see also Pennsylvania Dep’t of Corrections v. Yeskey, 524 U.S. 206, 118 S.Ct. 1952, 1956, 141 L.Ed.2d 215 (1998) (declining to address issue that was. not presented to either the District Court or the Court of Appeals); Adickes v. S.H. Kress & Co., 398 U.S. 144, 147 n. 2, 90 S.Ct. 1598, 26 L.Ed.2d 142 (1970) (“Where issues are neither raised before nor considered by the Court of Appeals, this Court will not ordinarily consider them.”). In contrast, “[t]he matter of what questions may be taken up and resolved for the first time on appeal is one left primarily to the discretion of the courts of appeals, to be exercised on the facts of individual cases.” Singleton v. Wulff, 428 U.S. 106, 121, 96 S.Ct. 2868, 49 L.Ed.2d 826 (1976); see also United States Nat’l Bank of Or., 508 U.S. at 445-48, 113 S.Ct. 2173 (stating that it was proper for the Court of Appeals to consider whether the controlling statute had been repealed despite the parties’ failure to raise the issue). Because the Department of Justice will not defend the constitutionality of § 3501 — and no criminal defendant will press the issue— the question of whether that statute, rather than Miranda, governs the admission of confessions in federal court will most likely not be answered until a Court of Appeals exercises its discretion to consider the issue. Here, the district court has suppressed a confession that, on its face, is admissible under the mandate of § 3501, i.e., the confession was voluntary under the Due Process Clause, but obtained in technical violation of Miranda. As a result, we are required to consider the issue now. Cf. Davis, 512 U.S. at 464, 114 S.Ct. 2350 (Sealia, J., concurring) (noting that the “time will have arrived” to consider the applicability of § 3501 the next time “a case that comes within the terms of th[e] statute is. presented to us”); see also Eric D. Miller, comment, Should Courts Consider 18 U.S.C. § 8501 Sua Sponte?, 65 U. Chi. L.Rev. 1029 (1998) (answering question in the affirmative). a. Having determined that the issue is properly before the panel, we must first determine whether § 3501 purports to supersede the rule set forth by the Supreme Court in Miranda. To do so, a brief history of the rules governing the admissibility of confessions before and after Miranda is in order. See generally Development in the Law— Confessions, 79 Harv. L.Rev. 935 (1966) [hereinafter Developments ]. “At early common law, confessions were admissible at trial without restrictions.” Id. at 954; see also McCormick’s Handbook on the Law of Evidence § 147, at 313 (1972) (Edward W. Cleary, ed., West 2d ed.1972) (citing 3 Wigmore, Evidence § 818 (3d ed.1940)). In the latter part of the eighteenth century, however, courts began to recognize that certain confessions were not trustworthy. See, e.g., The King v. Rudd, 168 Eng. Rep. 160 (K.B.1783) (holding that “no credit ought to be given” to “a confession forced from the mind by the flattery of hope, or by the torture of fear”). Although several tests were developed to determine whether a confession was trustworthy, a confession was generally thought to be reliable only if made voluntarily. See, e.g., Regina v. Garner, 169 Eng. Rep. 267 (Ct.Crim.App.1848); Regina v. Baldry, 169 Eng. Rep. 568 (Ct.Crim.App.1852). In Hopt v. Utah, 110 U.S. 574, 4 S.Ct. 202, 28 L.Ed. 262 (1884), the Supreme Court specifically adopted the common law rule that a confession was reliable, and therefore admissible, if it was made voluntarily. Id. at 584-85, 4 S.Ct. 202 (holding that a confession was voluntary if not induced by threat or promise) (citing Regina v. Baldry, 169 Eng. Rep. 568 (Ct.Crim.App.1852)); see also Pierce v. United States, 160 U.S. 355, 357, 16 S.Ct. 321, 40 L.Ed. 454 (1896) (same). In subsequent cases, the Supreme Court applied the common law test of voluntariness to confessions. See Developments, supra, at 959. In so doing, the Court rejected the argument that a confession was involuntary simply because the suspect was in custody. See Sparf v. United States, 156 U.S. 51, 55, 15 S.Ct. 273, 39 L.Ed. 343 (1895). Similarly, in Wilson v. United States, 162 U.S. 613, 16 S.Ct. 895, 40 L.Ed. 1090 (1896), the Supreme Court specifically held that the failure to warn a suspect of his right to remain silent and of his right to counsel did not render a confession involuntary. Id. at 624, 16 S.Ct. 895. In Bram v. United States, 168 U.S. 532, 18 S.Ct. 183, 42 L.Ed. 568 (1897), the Supreme Court asserted, for the first time, a constitutional basis for its requirement that a confession be made voluntarily. Id. at 542, 18 S.Ct. 183 (stating that whether a confession is voluntary “is controlled by that portion of the fifth amendment ... commanding that no person ‘shall be compelled in any criminal case to be a witness against himself ” (quoting U.S. Const, amend. V.)). According to the Court, the Fifth Amendment privilege against self-incrimination “was but a crystallization” of the common law rule that only voluntary confessions are admissible as evidence. Id. Although the Supreme Court— prior to Miranda — would eventually place less reliance upon the approach taken in Bram, see, e.g., United States v. Carignan, 342 U.S. 36, 41, 72 S.Ct. 97, 96 L.Ed. 48 (1951) (expressing doubt about “[wjhether involuntary confessions are excluded from federal criminal trials on the ground of a violation of the Fifth Amendment’s protection against self-incrimination, or from a rule that forced confessions are untrustworthy” (footnote omitted)), the Supreme Court in Brown v. Mississippi, 297 U.S. 278, 56 S.Ct. 461, 80 L.Ed. 682 (1936), invoked another constitutional basis for its requirement that a confession be made voluntarily: the Due Process Clause. Id. at 285-86, 56 S.Ct. 461. Thereafter, a confession was admissible only if voluntary within the meaning of the Due Process Clause. See, e.g., Haynes v. Washington, 373 U.S. 503, 83 S.Ct. 1336, 10 L.Ed.2d 513 (1963); Ashcraft v. Tennessee, 322 U.S. 143, 154, 64 S.Ct. 921, 88 L.Ed. 1192 (1944); Chambers v. Florida, 309 U.S. 227, 60 S.Ct. 472, 84 L.Ed. 716 (1940). Thus, prior to Miranda, the rule governing the admissibility of confessions in federal court — if not the rule’s justification — remained the same for nearly 180 years: confessions were admissible at trial if made voluntarily. See, e.g., Davis v. United States, 512 U.S. 452, 464, 114 S.Ct. 2350, 129 L.Ed.2d 362 (1994) (Scalia, J., concurring) (noting that prior to Miranda, “voluntariness vel non was the touchstone of admissibility of confessions”); Miranda v. Arizona, 384 U.S. 436, 506-07, 86 S.Ct. 1602, 16 L.Ed.2d 694 (1966) (Harlan, J., dissenting) (noting that voluntariness has been the test for admitting confessions since the earliest days of the Republic). Indeed, in Lisenba v. California, 314 U.S. 219, 62 S.Ct. 280, 86 L.Ed. 166 (1941), the Supreme Court specifically referred to “voluntariness” as the federal test for determining the admissibility of confessions. Id. at 236, 62 S.Ct. 280. Such was the stage in 1966 when the Supreme Court decided Miranda v. Arizona, 384 U.S. 436, 86 S.Ct. 1602, 16 L.Ed.2d 694 (1966). In Miranda, the Supreme Court announced a new analytical approach to the admissibility of confessions. Specifically, the Court rejected a case-by-case determination of whether a confession was voluntary. Instead, the Court held that any statement stemming from the custodial interrogation of a suspect would be presumed involuntary, and therefore inadmissible, unless the police first provided the suspect with four warnings. Although the Court relied upon its prior decision in Bram v. United States, 168 U.S. 532, 18 S.Ct. 183, 42 L.Ed. 568 (1897) (holding that voluntariness is required by the Fifth Amendment), for support, Miranda, 384 U.S. at 461-62, 86 S.Ct. 1602, the Court acknowledged that the Constitution requires no “particular solution for the inherent compulsions of the interrogation process,” id. at 467, 86 S.Ct. 1602, and left open the opportunity for the States and Congress to “develop their own safeguards for the privilege, so long as they are fully as effective as [the four warnings] in informing accused persons of their right of silence and in affording a continuous opportunity to exercise it,” id. at 490, 86 S.Ct. 1602. The Court held that until that time, the warning “safeguards must be observed.” Id. at 467, 86 S.Ct. 1602. Congress enacted § 3501 just two years after the Supreme Court decided Miranda. When interpreting an act of Congress, “our inquiry begins with an examination of the language used in the statute.” Faircloth v. Lundy Packing Co., 91 F.3d 648, 653 (4th Cir.1996) (citing Stiltner v. Beretta U.S.A. Corp., 74 F.3d 1473, 1482 (4th Cir.), cert. denied, — U.S.-, 117 S.Ct. 54, 136 L.Ed.2d 18 (1996)), cert. denied, — U.S. -, 117 S.Ct. 738, 136 L.Ed.2d 677 (1997). Section 3501 provides as follows: (a) In any criminal prosecution brought by the United States or by the District of Columbia, a confession, as defined in subsection (e) hereof, shall be admissible in evidence if it is voluntarily given. Before such confession is received in evidence, the trial judge shall, out of the presence of the jury, determine any issue as to voluntariness. If the trial judge determines that the confession was voluntarily made it shall be admitted in evidence and the trial judge shall permit the jury to hear relevant evidence on the issue of voluntariness and shall instruct the jury to give such weight to the confession as the jury feels it deserves under all the circumstances. (b) The trial judge in determining the issue of voluntariness shall take into consideration all the circumstances surrounding the giving of the confession, including (1) the time elapsing between arrest and arraignment of the defendant making the confession, if it was made after arrest and before arraignment, (2) whether such defendant knew the nature of the offense with which he was charged or of which he was suspected at the time of making the confession, (3) whether or not such defendant was advised or knew that he was not required to make any statement and that any such statement could be used against him, (4) whether or not such defendant had been advised prior to questioning of his right to the assistance of counsel; and (5) whether or not such defendant was without the assistance of counsel when questioned and when giving such confession. The presence or absence of any of the above-mentioned factors to be taken into consideration by the judge need not be conclusive on the issue of voluntariness of the confession. (c) In any criminal prosecution by the United States or by the District of Columbia, a confession made or given by a person who is a defendant therein, while such person was under arrest or other detention in the custody of any law-enforcement officer or law-enforcement agency, shall not be inadmissible solely because of delay in bringing such person before a magistrate or other officer empowered to commit persons charged with offenses against the laws of the United States or of the District of Columbia if such confession is found by the trial judge to have been made voluntarily and if the weight to be given the confession is left to the jury and if such confession was made or given by such person within six hours immediately following his arrest or other detention: Provided, That the time limitation contained in this subsection shall not apply in any case in which the delay in bringing such person before such magistrate or other officer beyond such six-hour period is found by the trial judge to be reasonable considering the means of transportation and the distance to be traveled to the nearest available such magistrate or other officer. (d) Nothing contained in this section shall bar the admission in evidence of any confession made or given voluntarily by any person to any other person without interrogation by anyone, or at any time at which the person who made or gave such confession was not under arrest or other detention. (e) As used in this section, the term “confession” means any confession of guilt of any criminal offense or any self-incriminating statement made or given orally or in writing. 18 U.S.C.A. § 3501. The above-quoted statutory language is plain. Congress has provided that “a confession ... shall be admissible in evidence if it is voluntarily given.” 18 U.S.C.A. § 3501(a). Based upon the statutory language, it is perfectly clear that Congress enacted § 3501 with the express purpose of legislatively overruling Miranda and restoring voluntariness as the test for admitting confessions in federal court. See, e.g., Stephen A. Saltzburg & Daniel J. Capra, American Criminal Procedure 545 (5th ed.1996) (noting that “the intent of Congress was to ‘overrule’ Miranda in favor of a return to the ‘voluntariness’ standard”). That Congress wished to return to a case-by-case determination of whether a confession was voluntarily given is undeniable. See S.Rep. No. 90-1097 (1968), reprinted in 1968 U.S.C.C.A.N. 2112. Although certainly not dispositive, it is worth noting that the Senate Report accompanying § 3501 specifically stated that “[tjhe intent of the bill is to reverse the holding of Miranda v. Arizona, 384 U.S. 436, 86 S.Ct. 1602, 16 L.Ed.2d 694 (1966).” Id. at 2141. Indeed, although acknowledging that “[tjhe bill would also set aside the holdings of such cases as McNabb v. United States, 318 U.S. 332, 63 S.Ct. 608, 87 L.Ed. 819 (1943), and Mallory v. United States, 354 U.S. 449, 77 S.Ct. 1356, 1 L.Ed.2d 1479 (1957),” id., the Report stated that Miranda “is the case to which the bill is directly addressed,” id. Senate opponents likewise recognized that § 3501, by making voluntariness the sole criterion for the admissibility of confessions, was meant to repeal the irre-buttable presumption created by Miranda. See id. at 2210-11 (noting that § 3501 was “squarely in conflict with the Supreme Court’s decision in Miranda v. Arizona”). Similarly, both proponents and opponents of § 3501 in the House of Representatives noted that the statute was meant to overrule the irrebuttable presumption created by Miranda. See, e.g., 114 Cong. Rec. 16,066 (1968) (statement of Rep. Celler); id. at 16,-074 (statement of Rep. Corman); id. at 16,-278 (statement of Rep. Poff); idi at 16,279 (statement of Rep. Taylor); id. at 16,296 (statement of Rep. Randall); id. at 16,297-98 (statement of Rep. Pollock). Although Congress enacted § 3501 with the express purpose of restoring volun-tariness as the test for admitting confessions in federal court, it is important to note that Congress did not completely abandon the central holding of Miranda, i.e., the four warnings are important safeguards in protecting the Fifth Amendment privilege against self-incrimination. Indeed, § 3501 specifically lists the Miranda warnings as factors that a district court should consider when determining whether a confession was voluntarily given. See 18 U.S.C.A. § 3501(b). Congress simply provided that the failure to administer the warnings to a suspect would no longer create an irrebuttable presumption that a subsequent confession was involuntarily given. See id. (providing that the Miranda warnings are not dispositive on the issue of voluntariness). b. Based on the statutory language alone, it is clear that Congress enacted § 3501 with the express purpose of returning to the pre-Miranda case-by-case determination of whether a confession was voluntary. We now turn to our next inquiry: Does Congress possess the authority to supersede the irre-buttable presumption created in Miranda that any unwarned statement to the police is involuntary, and therefore inadmissible? Interestingly, much of the scholarly literature on Miranda deals not with whether Congress has the legislative authority to overrule the presumption created in Miranda, but whether it should. Miranda’s opponents, like Professor Paul Cassell, contend that thousands of violent criminals escape justice each year as a direct result of Miranda. See, e.g., Paul G. Cassell & Richard Fowles, Handcuffing the Cops? A Thirty-Year Perspective on Miranda’s Harmful Effects on Law Enforcement, 50 Stan. L.Rev. 1055 (1998); Paul G. Cassell, All Benefits, No Costs: The Grand Illusion of Miranda’s Defenders, 90 Nw. U.L.Rev. 1084 (1996); Paul G. Cassell, Miranda’s Social Costs: An Empirical Reassessment, 90 Nw. U.L.Rev. 387 (1996). In contrast, its proponents, like Professor Stephen Schulhofer, argue that Miranda has had little impact on law enforcement’s ability to obtain confessions. See, e.g., Stephen J. Schulhofer, Miranda’s Practical Effect: Substantial Benefits and Vanishingly Small Social Costs, 90 Nw. U.L.Rev. 500 (1996); Stephen J. Schulhofer, Reconsidering Miranda, 54 U. Chi.' L.Rev. 435 (1987). This debate, however, is one we need not enter. Whether Congress should overrule Miranda tells us nothing about whether it could. More importantly, it is not our role to answer that question. It is the province of the judiciary to determine what the law is, not what it should be. See Marburg v. Madison, 5 U.S. (1 Cranch) 137, 2 L.Ed. 60 (1803). In City of Boerne v. Flores, 521 U.S. 507, 117 S.Ct. 2157, 138 L.Ed.2d 624 (1997), the Court recently held that Congress does not possess the legislative authority to supersede a Supreme Court decision construing the Constitution. See id. 117 S.Ct. at 2172 (refusing to enforce federal statute establishing more narrow test for violation of the Free Exercise Clause than prior test established by Supreme Court). On the other hand, Congress possesses the legislative authority to overrule judicially created rules of evidence and procedure that are not required by the Constitution. See Palermo v. United States, 360 U.S. 343, 345-48, 79 S.Ct. 1217, 3 L.Ed.2d 1287 (1959) (upholding federal statute establishing more narrow disclosure of Jenks material than prior rule established by Supreme Court); see also Carlisle v. United States, 517 U.S. 416, 426, 116 S.Ct. 1460, 134 L.Ed.2d 613 (1996) (noting that the federal courts may formulate rules of evidence and procedure so long as they do not conflict with an Act of Congress); Vance v. Terrazas, 444 U.S. 252, 265, 100 S.Ct. 540, 62 L.Ed.2d 461 (1980) (upholding statute altering the evidentiary standard for expatriation proceedings established by the Supreme Court because prior standard created by the Court was not required by “the Constitution”). In fact, the power of the Supreme Court to prescribe nonconstitutional “rules of procedure and evidence for the federal courts exists only in the absence of a relevant Act of Congress.” Palermo, 360 U.S. at 353 n. 11, 79 S.Ct. 1217 (citing Funk v. United States, 290 U.S. 371, 382, 54 S.Ct. 212, 78 L.Ed. 369 (1933), and Gordon v. United States, 344 U.S. 414, 418, 73 S.Ct. 369, 97 L.Ed. 447 (1953)). Whether Congress has the authority to enact § 3501, therefore, turns on whether the rule set forth by the Supreme Court in Miranda is required by the Constitution. If it is, Congress lacked the authority to enact § 3501, and Miranda continues to control the admissibility of confessions in federal court. See City of Boerne, 117 S.Ct. at 2172. If it is not required by the Constitution, then Congress possesses the authority to supersede Miranda legislatively, and § 3501 controls the admissibility of confessions in federal court. See Palermo, 360 U.S. at 353 n. 11, 79 S.Ct. 1217. Using the same analysis, several federal courts have found that § 3501 superseded the rule set forth in McNabb v. United States, 318 U.S. 332, 63 S.Ct. 608, 87 L.Ed. 819 (1943), and Mallory v. United States, 354 U.S. 449, 77 S.Ct. 1356, 1 L.Ed.2d 1479 (1957). See United States v. Pugh, 25 F.3d 669, 675 (8th Cir.1994) (holding that § 3501 superseded the McNabb/Mallory rule); United States v. Christopher, 956 F.2d 536, 538-39 (6th Cir.1991) (noting that § 3501, rather than McNabb/Mallory, governs the admissibility of confessions in federal court). In particular, the Eighth and Sixth Circuits first ascertained whether the rule set forth by the Supreme Court in McNabb and Mallory was required by the Constitution. See Pugh, 25 F.3d at 675; Christopher, 956 F.2d at 538-39. In McNabb, the Supreme Court exercised its supervisory power over the federal courts to exclude all incriminating statements, including voluntary confessions, obtained during an unreasonable delay between a defendant’s arrest and initial appearance. See 318 U.S. at 343-44, 63 S.Ct. 608. In Mallory the Supreme Court affirmed the holding of McNabb under Rule 5(a) of the Federal Rules of Criminal Procedure. See 354 U.S. at 455-56, 77 S.Ct. 1356. Finding that the rule set forth in McNabb and Mallory was not required by the Constitution, the Eighth and Sixth Circuits had little difficulty concluding that Congress possessed the legislative authority to overrule both cases. See Pugh, 25 F.3d at 675; Christopher, 956 F.2d at 538-39. We begin our analysis then, with the Supreme Court’s decision in Miranda. Several passages in Chief Justice Warren’s opinion for the Court suggest that the warnings safeguard rights guaranteed by the Constitution. See, e.g., Miranda, 384 U.S. at 490, 86 S.Ct. 1602 (noting that the privilege against self-incrimina