Affirmed and remanded in part and judgment withheld in part by published opinion. Judge TITUS wrote the opinion, in which Judge MICHAEL and Judge DUNCAN joined.
Ronald Collins appeals his conviction for conspiracy to distribute fifty (50) or more grams of a mixture containing a detectable amount of cocaine in violation of 21 U.S.C. § 841(a)(1) and maintaining and controlling a room or enclosure for the purpose of unlawfully storing, distributing, and using a controlled substance in violation of 21 U.S.C. § 856(a)(2). Collins also appeals his sentence for the above convictions. In addition, the Government cross-appeals, arguing that the district court erroneously •sentenced Collins.
Collins was indicted for his role in a larger drug conspiracy. Some of the members of that conspiracy testified against Collins at trial, including his nephew, Lionel Kearse. The thrust of the case for the defense was an attempt to discredit the various witnesses and informants who testified for the government. The jury, presumably finding at least some of the informants credible, found Collins guilty on both counts.
In his appeal, Collins raises five issues. First, he argues that the government attorney engaged in prosecutorial misconduct by making an improper “vouching” statement during her rebuttal closing argument. Second, he argues that the Government made a late disclosure of Brady material. Third, he argues that 21 U.S.C. § 841 is unconstitutional. Fourth, he argues that the district court gave improper jury instructions. Fifth, he argues that, under Apprendi and Blakely, his sentence is unconstitutional, as the facts used to sentence him were not determined by a jury beyond a reasonable doubt. 1 In addi *307 tion, the Government has filed a cross-appeal arguing that the district court’s determination of Collins’ criminal history was in error. Each of Collins’ issues on appeal will be considered and disposed of seria-tim, and the Government’s cross-appeal will be considered last.
Improper Argument (Vouching)
Collins’ first argument on appeal is that the prosecuting attorney made an improper statement during her rebuttal closing argument, unconstitutionally tainting the outcome of the case. As this issue raises a question of law, the appropriate standard of review is
de novo. United States v. Cheek,
That [plea] agreement is a contract between them [the cooperators] and the United States, which means that they have certain functions, and we have certain functions. Their function is to tell the truth. Each witness who got up there said that his job or responsibility was to tell the truth.
The government is always seeking to determine whether they are telling the truth, and we do not take lightly the fact that we have an agreement with the defendant — with each one of those witnesses where they are supposed to tell the truth.
J.A. 505-06. As conceded at oral argument, it is not this entire soliloquy which is arguably inappropriate. The allegedly improper statement is the first sentence of the second paragraph, where the prosecutor stated that the “government is always seeking to determine whether [a cooperator is] telling the truth [.]”
The question then presented is first, whether this statement constitutes improper vouching for the credibility of a witness and, if so, whether those “remarks or conduct -prejudicially affected [the Defendant’s] substantial rights so as to deprive him of a fair trial.”
United States v. Scheetz,
Collins argues, and the Government agrees, that “[i]t is impermissible for a prosecutor to indicate her personal belief in the credibility of Government witnesses or to elicit one witness’ opinion that another witness has told the truth.”
United States v. Hayes,
As could be expected considering the ubiquitous nature of cooperating witnesses *308 in criminal trials, the issue of a prosecutor referring to plea agreements at trial has been considered by most circuits. A Tenth Circuit opinion very effectively delineated what comments are appropriate and what comments are improper, explaining that
[presenting evidence on a witness’ obligation to testify truthfully pursuant to an agreement with the government and arguing that this gives the witness a strong motivation to tell the truth is not, by itself, improper vouching.... Use of the ‘truthfulness’ portions of [a plea agreement] becomes impermissible vouching only when the prosecutors explicitly or implicitly indicate that they can monitor and accurately verify the truthfulness- of the witness’ testimony.
United States v. Bowie,
The relevant case from this Circuit is
United States v. Henderson,
By its own language,
Henderson
differentiates the current situation from the introduction of the terms of a plea agreement on direct or re-direct examination. In explaining why the Government did not improperly draw attention to .the plea agreement, this Court found relevant the fact that “Henderson ma[de] no claim that the prosecutor made improper use of the plea bargain promise of truthfulness in closing argument.”
Henderson,
This distinction is an important one because the potential for impermissible vouching is greater during an attorney’s soliloquy to the jury than during an attorney’s interaction with a witness. In the former posture the attorney has greater leeway to develop her own thoughts and convey those concepts to the jury. Therefore, we do not find Henderson to be directly on point. Rather, applying the rationale of Bowie, Roberts and Arroyo-Angulo, we find the prosecutor’s argument in this case, at a stage when there is a heightened concern about impermissible vouching, either crossed the line, or, at best, was a close call.
*309
However, regardless of the side of the line on which this statement falls, we conclude that it did not “so infect [] the trial with unfairness as to make the resulting conviction a denial of due process.”
Scheetz,
First, it is unlikely, considering the overall context in which the statement was made, that the prosecutor’s statement misled the jury. As this Court found relevant in
Henderson,
“[t]he trial judge instructed the jury on the caution necessary in evaluating testimony given pursuant to a plea bargain.”
Henderson,
The second Sanchez factor strongly militates against a finding of reversible error. As distilled at oral argument, the problematic statement was actually only one clause of a sentence in the middle of the rebuttal closing argument. As noted above, not only was the statement sufficiently sanitized by the district court’s subsequent jury instruction, it was also an isolated, rather than pervasive or extensive, comment.
With regard to the third Sanchez factor, Collins asserts that the Government’s case was centered around the cooperating witnesses who signed plea agreements. Appellant’s Brief at 21; see also J.A. 81, 347 (listing the witnesses, eight of' whom signed plea agreements with the Government or were promised immunity). Therefore, Collins argues, this factor weighs in favor of a finding of prosecutorial misconduct because the jury’s verdict was primarily based on a credibility deter *310 mination of those witnesses, allegedly buttressed by the improper statement in the Government’s rebuttal closing argument'. Collins is correct that much of the evidence presented was the testimony of cooperating witnesses. See Appellant’s Brief at 4 (“[T]he Government relied entirely upon historical information from cooperating witnesses[.]”). The Court also agrees with Collins that if vouching did occur, then it improperly buttressed the credibility of all cooperating witnesses. Considering the Government’s reliance on testimony from numerous cooperating witnesses, it is clear that if those witnesses were not deemed credible by the jury, then the Government’s case would have been weaker. Accordingly, this factor, as Collins contends, does weigh towards a finding of reversible error.
Finally, the fourth Sanchez factor militates against a finding of reversible error. Nothing in the record suggests that the comments were “deliberately made to divert the jury’s attention,” and the Defem-dant does not so contend.
Considering all the factors enunciated in Sanchez, even accepting Collins’ argument that the third factor weighs towards a finding of prosecutorial misconduct, we conclude that it is outweighed by the other three factors, leading to the conclusion that there was no reversible error.
Late Disclosure of Brady Evidence
Collins’ next argument for a reversal of the conviction is an alleged violation of the
Brady
doctrine.
Brady
held that “the suppression by the prosecution of evidence favorable to an accused upon request violates due process where the evidence is material either to guilt or to punishment, irrespective of the good faith or bad faith of the prosecution.”
Brady v. Maryland,
First, “evidence is ‘material’ under
Brady,
and the failure to disclose it justifies setting aside a conviction, only where there exists a ‘reasonable probability’ that had the evidence been disclosed the result at trial would have been different.”
Wood v. Bartholomew,
Unconstitutionality of 21 U.S.C. § 841
Collins argues that, pursuant to
Apprendi v. New Jersey,
Jury Charge Regarding Drug Quantity
During its deliberations, the jury submitted several questions to the district court. One read as follows: “Under Count 1, does the amount of drug apply to Ron Collins alone or the entire group of' conspirators?” J.A. 527. The court answered the question as follows: “The amount of drugs applies to the entire group of conspirators. In other words, it’s a conspiracy to distribute 50 grams or more of crack cocaine. That’s what the charge is. So the amount applies to the conspiracy, to the group.” J.A. 533.
Collins argues that the district court erred in answering the jury’s question. Collins contends that the jury should have been instructed that in order to hold Collins responsible for 50 grams or more of crack cocaine it must make one of two findings, either that (1) Collins himself was involved in the distribution of 50 grams of crack cocaine, or (2) other members of the conspiracy were involved in that amount, and those actions of coconspirators were both reasonably foreseeable and in furtherance of the jointly undertaken criminal activity,
see Pinkerton v. United States,
The Superseding Indictment charged Collins- with two counts: Count 1, a violation of 21 U.S.C. § 846 (conspiracy to distribute a controlled substance), and Count 2, a violation of 21 U.S.C. § 856(a)(2) (maintaining a crack house). J.A. 15-17 Collins’ appeal concerning the district court’s allegedly erroneous answer to the jury’s question implicates only Count 1.
Section 846 of Title 21 is a conspiracy statute. It provides that “[a]ny person who attempts or conspires to commit any offense defined in this subchapter shall be subject to the same penalties as those prescribed for the offense, the commission of which was the object of the attempt or conspiracy.” 21 U.S.C. § 846. Count 1 of the Superseding Indictment charged Collins with conspiracy to violate § 841(a)(1), *312 which makes it a crime to intentionally “manufacture, distribute, or dispense, or possess with the intent to manufacture, distribute, or dispense, a controlled substance.” 21 U.S.C. § 841(a)(1). Section 841(b) establishes the penalties applicable to individuals who violate § 841(a). Not surprisingly, the greater the quantity of drugs involved, the harsher the penalty.
The most stringent penalty section under § 841(b), § 841(b)(1)(A), mandates a 10 year minimum sentence for an individual found guilty under § 841(a) for manufacturing, distributing, or dispensing (or possessing with the intent to engage in those activities) 50 grams or more of cocaine base. The Superseding Indictment contemplates this subsection by charging Collins with conspiring to distribute 50 or more grams of cocaine base, commonly known as crack cocaine. J.A. 15.
Considering the statutory scheme outlined above, it is clear that the amount of narcotics attributable to a defendant dictates the period of incarceration for a defendant convicted of the substantive offense. When a defendant is charged and convicted for
conspiracy
to violate § 841(a), the important question of quantity becomes more difficult to interpret and apply. Should -an individual defendant, found guilty of conspiracy to violate § 841(a), be sentenced under § 841(b) by considering the amount of narcotics distributed by the
entire conspiracy ?
Or should that defendant’s sentence be more individualized, subjecting him to punishment only for distribution of the amount of narcotics
attributable to him?
In
United States v. Irvin,
In Irvin, the Government argued that
in a narcotics conspiracy comprised of different individuals and multiple criminal acts, a district court must determine the applicable sentence by ascertaining the quantity of narcotics involved in each object of the offense of the conspiracy, aggregate these amounts, and then assign to each coconspirator the mandatory minimum sentence of § 841(b) corresponding to the aggregated quantity of narcotics.
Id.
at 76. Although we observed that this was a plausible interpretation of § 841(b) and §. 84.6, we noted that “[ujnder another logical reading of the statutory language, the sentencing provisions applicable to conspiracies involving multiple narcotics should be individualized to reflect a particular coconspirator’s relative culpability in the conspiracy.”
Id.
3
We then unambiguously rejected the Government’s interpretation, concluding that “the most reasonable interpretation of the relevant statutory provisions requires a sentencing court to assess the quantity of narcotics attributable to each coconspirator by relying on the principles set forth in
Pinkerton.” Id.
at 77 (citing
United States v. Martinez,
Having established the governing principles, we now turn to the facts of this case. Once again two questions must be answered. First, did the district court err in its answer to the jury’s question? Second, if the district court erred, what is the appropriate remedy? We conclude that the district court did err. The error, however, ..was not the court’s answer to the question, but the failure to give a supplemental instruction which is necessary to *313 determine the penalty subsection in § 841(b) applicable to Collins.
Collins argues that the district court’s answer to the question was
in contravention of the requirement that a defendant is only responsible for drug activity by other conspirators that was both within the scope of his agreement (i.e., a part of his jointly undertaken activity) and reasonably foreseeable to him. Thus, the jury’s determination that Mr. Collins was responsible for the drug quantity threshold of 50 grams or more of crack cocaine must be set aside.
Appellant’s Brief at 37. Stated differently, Appellant argues that the district court, when answering the jury’s question, should have given a Pinkerton instruction.
The principles outlined in
Pinkerton,
however, have no applicability to a conviction under § 846.
Pinkerton
principles are relevant when a conspirator is charged with a substantive offense arising from the actions of a coconspirator, not when a conspirator is charged with conspiracy.
4
Because Count 1 charges Collins with conspiracy (§ 846), and not a substantive offense, the district court’s answer to the jury’s question, as well as its original conspiracy instruction,
see
Trans. at 444, is unassailable as a matter of law.
See e.g., United States v. Wilson,
Although the district court correctly instructed the jury as to the elements of conspiracy, it erred by not issuing a further instruction relating to the factual predicate necessary for sentencing. As previously outlined, § 841(b) has various subsections that prescribe gradations of minimum and maximum sentences dependent on the quantity of narcotics involved in the violation. Following
Irvin,
the subsection of § 841(b) applicable to an individual defendant is determined by a consideration of the amount of narcotics attributable to that defendant.
Irvin
was decided, however, prior to
Apprendi v. New Jersey,
At the time
Irvin
was decided, it was the district court that determined, under a preponderance of the evidence standard, the quantity of narcotics attributable to a defendant for purposes of setting the specific threshold drug quantity under § 841(b).
See Irvin,
By failing to instruct the jury in a manner consistent with our holding in Irvin (ie. that, for purposes of setting a specific threshold drug quantity under § 841(b), the jury must determine what amount of cocaine base was attributable to Collins using Pinkerton principles), the district court’s sentence effectively attributed to Collins, an individual member of the conspiracy, the quantity of cocaine base distributed by the entire conspiracy. Because the district court adopted the jury’s drug quantity determination in its application of the sentencing guidelines, the error affected both the threshold statutory range under § 841(b) and the district court’s application of the guidelines. For these reasons, the district court’s sentence, which was based on the 10 year minimum set forth in § 841(b)(1)(A), cannot stand.
Having determined that the district court’s failure to issue appropriate jury instructions concerning the facts necessary to determine Collins’ sentence, we turn to the more difficult question of fashioning the appropriate remedy. As we have already made clear, Collins’ conviction under § 846 is sound. The jury unanimously found Collins to be guilty of a conspiracy to distribute crack cocaine (ie. a conspiracy to violate § 841(a)). See Paper No. 54 (Verdict Sheet, question 1). Guilt of the substantive offense defined in § 841(a) is not dependent upon a determination of the amount or type of narcotics distributed. Therefore, the error below concerns not § 841(a), but the penalty provisions in § 841(b).
Because the conviction of conspiracy to violate § 841(a) is sound, remanding for a new trial is not the appropriate remedy. It is also clear that remanding the case for resentencing, and permitting the district court to determine the quantity of cocaine base for § 841(b) purposes, would be inconsistent with ' the Sixth Amendment.
See Apprendi,
In
United States v. Rhynes,
In fashioning a remedy in Rhynes we looked to Quicksey, the case which compelled our Rhynes conclusion. See id. at 381.. Following Quicksey, the - remedy adopted in Rhynes was to “withhold judgment as to the sentences of [three defendants] under Count I, giving the Government the choice between resentencing these defendants consistent with a marijuana conspiracy conviction, or retrying them on Count I.” Id. “If the Government chooses to resentence these defendants, we will affirm the convictions and remand for resentencing. If the Government does not so choose, we will vacate the sentences and remand for a new trial on Count I.” Id. Although this remedy was ultimately voided by a later en banc decision remanding the case for a new trial, the panel’s proposed resolution provides helpful guidance in fashioning the appropriate remedy in this case.
We - will withhold judgment as to the conspiracy count for- thirty days. The Government may elect to request that we affirm the conspiracy conviction and remand for Collins to be resentenced under the default penalty provision in § 841 that applies when the amount of crack cocaine attributable to a defendant is less than 5 grams, 21 U.S.C. § 841(b)(1)(C) (providing for a range of zero to 20 years imprisonment), or the Government can request that we reverse Collins’s conspiracy conviction and remand for a new trial.
Cross-Appeal by the Government — Crimi nal History Category of Defendant
At the sentencing portion of the trial, the district court determined that Collins’ criminal history should be Category I rather than Category III. J.A. 575. The Government argues that the district court’s sentencing determination was in error. This court reviews “a district court’s interpretation of the applicable sentencing guidelines
de novo
and its factual findings for clear error.”
United States v. Quinn,
The dispute regarding Collins’ criminal history stems from his prior DWI convictions in 1988, 1989, and 1990. When this case reached the sentencing stage, the Government argued that Collins should be assigned a criminal history of Category III. See generally U.S. Sentencing Guidelines Manual § 4A1.1 (2003). Collins, in rebuttal, contended that the district judge should place him in Category I because “there is no information concerning whether Mr. Collins had attorney representation for these offenses. Nor, is there any information reflecting whether Mr. Collins received any jail time for the offenses.” J.A. 546. Additionally, Collins’ counsel asserted that, “[d]ue to the age of the offense, Mr. Collins also does not recall whether he in fact had counsel or went to jail.” Id.
Under
Burgett v. Texas,
*316 Given the nature of those [DWI] offenses, while driving while intoxicated is a serious offense, it’s certainly not the same thing as dealing drugs or burglary or serious types of felonies, and it strikes the Court that while the government is arguing that the court draw an inference of regularity, the criminal law also talks about the rule of lenity,, and I think that this criminal history is not sufficiently reliable for the Court to impose a level III on this defendant.
J.A. 575. This conclusion was reached even though Collins offered no evidence that the prior convictions were not constitutionally sound. 6
The underlying issue, as we see it, is effectively a question of burden shifting. When a prior conviction is used to assess the applicable criminal history category of a defendant, pursuant to sections 4A1.1 and 4A1.2 of the Sentencing Guidelines, should the. burden fall on the government to show that there was no constitutional defect regarding that prior conviction, or should the burden fall on the Defendant to at least raise an inference of the invalidity of the prior conviction? We believe that the burden should fall on the Defendant.
We arrive at this conclusion by following Supreme Court precedent which states that “even when a collateral attack on a final conviction rests on constitutional grounds, the presumption of regularity that attaches to final judgments makes it appropriate to assign a proof burden to the defendant.”
Parke v. Raley,
The First Circuit also found
Parke
to dictate the same outcome.
Gray,
*317 During sentencing, the district court stated that the “criminal history is not sufficiently reliable for the Court to impose a level III on this defendant!)]” so it was “going to make an adjustment to the criminal history.” J.A. 575. It was not clear, however, whether the district court, when making its sentencing determination, granted a downward departure pursuant to § 4A.1.3 of the Sentencing Guidélines or whether the district court refuséd to apply the presumption of regularity. Assuming that the district court’s decision was based on the failure to apply the presumption, or the balancing of the presumption with the rule of lenity, 7 we conclude that such a decision was improper as a matter of law.
CONCLUSION
In sum, we conclude that the district court’s sentence was erroneous for two reasons. First, the district court’s failure to issue instructions conveying the- principles enumerated in
Pinkerton
prevented the jury from making a factual finding which would serve as the necessary predicate for the district court’s sentence. Second, the district court did not properly take into account Collins’ criminal history. Thus, we affirm Collins’s conviction for maintaining and controlling a room or enclosure for the purpose of unlawfully storing, distributing, and using a controlled substance in violation of 21 U.S.C. § 856(a)(2) and remand for resentencing in a manner consistent with this opinion and with “the remedial scheme adopted, by the Court in
Booker
[.]”
United States v. Robinson,
AFFIRMED AND REMANDED IN PART AND JUDGMENT- WITHHELD IN PART.
Notes
. In his supplemental brief, and again at oral argument, Collins sought to preserve the issue of the unconstitutionality of his sentence "in the event that the Supreme Court issues a favorable decision! ]” in
United States v. Booker,
-U.S.-,
. 21 U.S.C. § 841(b) prescribes the penalties for manufacturing, distributing, or dispensing controlled substances; or possessing controlled substances with the intent to engage in the above activities. This subsection determines the length of incarceration for a violation by considering both the type of controlled substance and the weight of the substance.
. Irvin considered the issue of individualized culpability in the context of both narcotic type and quantity. In this case, the Superseding Indictment charged Collins only with conspiracy to distribute one type of controlled substance: cocaine base. Thus, the only required individualized determination is quantity.
. For example, in
Pinkerton,
brothers Daniel and Walter Pinkerton were charged with both substantive violations of the Internal Revenue Code and conspiracy to violate those provisions. There was no evidence to show that Daniel had committed the substantive offense. Nevertheless, his conviction on those offenses was upheld because there was ample proof that Walter, his coconspirator, had committed those offenses during and in furtherance of the unlawful conspiracy. The Court explained that "so long as the partnership in crime continues, the partners act for each other in carrying it forward."
Pinkerton,
. In
Apprendi v. New Jersey,
. For an example of an instance where a defendant did submit sufficient evidence to defeat the presumption that a prior conviction was constitutionally sound, see
Burgett,
. The district court referenced the rule of lenity during the sentencing hearing. The rule of lenity is invoked when a criminal statute is ambiguous. It has. the effect of directing a court to interpret an ambiguous criminal statute in such a way that results in a more lenient punishment for the defendant.
See Black’s Law Dictionary
(7th ed.) (“The rule of lenity is a judicial doctrine holding that a court, in construing an ambiguous criminal statute that sets out multiple or inconsistent punishments, should resolve the ambiguity in favor of the more lenient punishment.”);
United States v. Wildes,
