Affirmed by published opinion. Judge WILKINS wrote the opinion, in which Judge NIEMEYER and Judge CHAMBERS joined.
Terry Fenner and Herbert Fenner appeal their various drug and firearm convictions- and resulting sentences. They principally argue that the district court erred in concluding that it was not authorized to depart downward from their applicable guideline ranges based on its concern that a literal application of the cross reference in U.S. Sentencing Guidelines Manual § 2K2.1(c)(l)(B) (1995) resulted in a sentence that was violative of due process. Finding that the district court did not err in determining that it lacked authority to depart based on the application ■ of the § 2K2.1(c)(l)(B) cross reference, and concluding that the Fenners’ remaining allegations of error lack merit, we affirm the Fen-ners’ convictions and sentences.
I.
Robert Holley recruited Terry Fenner into a Baltimore, Maryland heroin and cocaine distribution conspiracy. Terry’s primary responsibility was to oversee other members of the conspiracy and to prevent robberies by rival gang members. Holley, however, ultimately ousted Terry following a heated argument that occurred when Holley became convinced that Terry had embezzled drug proceeds. Two days after this dispute, Holley was murdered on the street outside his home. Eyewitnesses to the murder indicated that two men with firearms, whom they identified as brothers Terry and Herbert Fenner, had approached Holley as he was attempting to hail a taxi and shot him as he fled from them.
The Fenners were charged with Holley’s murder in state court and acquitted. Thereafter, they were prosecuted on federal charges. Terry was found guilty of conspiring to distribute cocaine and heroin, see 21 U.S.C.A. § 846 (West Supp.1998); using or carrying a firearm during and in relation to a crime of violence, see 18 U.S.C.A. § 924(c)(1) (West Supp.1998); and being a felon in possession of a firearm, see 18 U.S.C.A. § 922(g)(1) (West Supp.1998). Herbert was convicted of two counts of being a felon in possession of a firearm, see 18 U.S.C.A. § 922(g)(1), and possessing an unregistered sawed-off shotgun, see 26 U.S.C.A. § 5861(d) (West 1989). The jury was unable to reach a verdict with respect to a separate charge against the Fenners of using or carrying a firearm during and in relation to a drug trafficking offense, see 18 U.S.C.A. § 924(c)(1), a charge that related to the weapons they used in connection with Holley’s murder. The district court ultimately entered a judgment of acquittal on that charge, ruling that because Terry had been expelled from the drug distribution conspiracy prior to Holley’s murder, the evidence was insufficient to support a determination that they possessed the weapons “during and in relation to” a drug trafficking offense. 18 U.S.C.A. § 924(c)(1).
At sentencing, the district court found that the Fenners were responsible for Holley’s murder and applied the cross reference to the homicide guidelines contained in U.S.S.G. § 2K2.1(c)(l)(B). The district court determined Terry’s base offense level by employing the first-degree murder guideline. See U.S.S.G. § 2A1.1. And, Terry’s offense level of 43, combined with his Criminal History Category of VI, resulted in a guideline sentence of 55 years imprisonment — the statutory maximum penalty available by imposing consecutive sentences for the three offenses of conviction. See -U.S.S.G. §§ 5Gl.l(a), 5G1.2(d); see also 18 U.S.C.A. § 924(a)(2) (West Supp.1998) (providing a maximum penalty of ten years imprisonment for a violation of § 922(g)); 18 U.S.C.A. § 924(c)(1) (providing a five-year mandatory consecutive sentence for using or carrying a firearm during and in relation to a drug trafficking offense); 21 U.S.C.A. § 841(b)(1)(B) (West Supp.1998) (providing a maximum penalty of 40 years imprisonment for a violation of § 846 involving “100 grams or more of a mixture or *363 substance containing a detectable amount of heroin”). The district court determined Herbert’s base offense level by applying the second-degree murder guideline. See U.S.S.G. § 2A1.2. 1 Herbert’s base offense level of 33, combined with his Criminal History Category of V, resulted in a guideline range of 210-262 months imprisonment. Although the district court expressed concern that the application of the cross reference resulted in a rather large enhancement of the Fenners’ guideline ranges — without the use of the cross reference Terry’s guideline range would have been 442-507 months imprisonment and Herbert’s guideline range would have been 92-115 months imprisonment — it refused to depart downward, ruling that it lacked the authority to do so. The district court sentenced Terry and Herbert respectively to 55 years and 210 months imprisonment.
II.
The Fenners principally argue that because the district court erroneously believed that it lacked the authority to depart downward, the sentences imposed upon them must be vacated to permit the district court to determine whether to depart. In support of their argument, the Fenners explain that the district court ruled prior to the decision of the Supreme Court in
Koon v. United, States,
The Fenners are correct that
Koon
holds that a district court is categorically forbidden to depart only on those bases expressly foreclosed by the guidelines themselves. Nevertheless, the
Koon
Court recognized that decisions to depart grounded upon other bases would be reviewed for an abusé of discretion.'
See id.
at 96-100,
A.
Congress has instructed that a district court must impose a sentence within the range that results from the proper application of the guidelines “unless the court finds that there exists an aggravating or mitigating circumstance of a kind, or to a degree, not adequately taken into consideration by the Sentencing Commission in formulating the guidelines that should result in a sentence different from that described.” 18 U.S.C.A. § 3553(b). (West Supp.1998). In order to ascertain whether a factor under consideration is an appropriate basis for departure, a sentencing court should determine whether the factor was forbidden, encouraged, discouraged, or unmentioned by the Commission as a basis for departure.
See Koon
, 518 U.S. at. 93-96,
If a factor is one upon which the Commission has neither forbidden, encouraged, nor discouraged departure in the guidelines, policy statements, or commentary, the circumstance is considered to be an unmentioned factor.
See id.
at 96,
Here, the enhancement resulting from an application of the § 2K2.1(c)(l)(B) cross reference has not been identified by the Commission in the guidelines, policy statements, or commentary as a forbidden, encouraged, or discouraged basis for departure. Application of the cross reference cannot be considered a forbidden factor because it is not listed by the Commission as one “that never can be” a basis for departure.
Id.
at 93,
To determine whether departure based on an unmentioned factor is appropriate, a “court must, after considering the structure and theory of both relevant individual guidelines and the Guidelines taken as a whole, decide whether [the factor] is sufficient to take the case out of the Guideline’s heartland.” Id. (citation & internal quotation marks omitted). Accordingly, it must be determined whether the enhancement resulting from application of the cross reference is taken into account within the heartland of the applicable guidelines.
Section 2K2.1 was written by the Commission to address the heartland of a wide variety of firearm possession and transportation offenses. See U.S.S.G. § 2K2.1. A cross reference contained in § 2K2.1(c)(1) provides that “[i]f the defendant used or possessed any firearm ... in connection with the commission ... of another offense, ... apply ... (B) if death resulted, the most analogous offense guideline from Chapter Two, Part A, Subpart 1 (Homicide), if the resulting offense level is greater than that determined above.” The language of the cross reference plainly indicates that when a firearm is illegally possessed in connection with another offense in which death results, the sentencing court must enhance the defendant’s sentence in accordance with the homicide guidelines if *365 that sentence is greater than that calculated without reference to the homicide guidelines. Thus, there can be no 'doubt that the guidelines take into account that the application of the § 2K2.1(c)(l)(B) cross reference will result in an enhanced guideline range.
B.
The Fenners contend, however, that even if the application of the § 2K2.1(c)(l)(B) cross reference does not constitute a basis for downward departure because that factor is taken into consideration in the guidelines, the present facts nevertheless present a factor warranting departure that is not accounted for in the guidelines. The Fenners maintain that the enhancement to then- guideline range is so large that it may not be imposed on the basis of conduct of which they have been acquitted twice without a violation of their rights to due process. Thus, they contend, the district court must have been authorized to depart downward in order to cure the due process violation that would result if a sentence were imposed within the guideline range resulting from an application of the § 2K2.1(c)(l)(B) cross reference.
The constitutional guarantee of due process protects a criminal defendant “against conviction except upon proof beyond a reasonable doubt of every fact necessary to constitute the crime with which he is charged.”
In re Winship,
For example, in
Mullaney v. Wilbur,
In contrast, in
McMillan,
the Court upheld against a due process challenge a Pennsylvania law providing for a five-year mandatory minimum sentence when a defendant who was convicted of specified crimes visibly possessed a firearm during the commission ’of the offense.
See McMillan,
Thus, it can be said that sometimes the prosecution must bear the burden of proving beyond a reasonable doubt facts bearing upon sentencing even though such facts do not establish an element of the offense. The precise due process limitations on the allocation or standard of proof for facts that bear on the degree of criminal culpability but that are not defined by law as an element of the offense have not been clarified, however.
See McMillan, ' All
U.S. at 86,
Here, as explained above, the sentencing guidelines provide that in determining the appropriate sentence for specified firearms offenses governed by U.S.S.G. § 2K2.1, the court should impose a sentence commensurate with that dictated by the most analogous homicide guideline if the firearm was used or possessed in connection with another offense in which death resulted and if the sentence so calculated is greater than that indicated by reference to the firearms guideline.
See
U.S.S.G. § 2K2.1(c)(l)(B). The § 2K2.1(c)(l)(B) cross reference “does not transgress the limits expressly set out in
Patterson.” McMillan, All
U.S. at 86,
In support of their position, the Fenners point to
United States v. Lombard,
Lombard, however, presents a different situation than that presented here, and we need not resolve the issue presented in Lombard to conclude that the Fenners faced no due process violation in the application of the § 2K2.1(e)(l)(B) cross reference. Because the statutory maximum term of imprisonment to which the Fenners were subjected was far less than the sentence of life imprisonment to which Lombard was exposed, the application of the § 2K2.1(c)(l)(B) cross reference did not implicate an increase in criminal culpability in kind or degree similar to the enhancement at issue in Lombard, which the court there found dispositive. Consequently, we do not find Lombard to be persuasive.
III.
In sum, we reject the Fenners’ argument that the application of the § 2K2.1(c)(l)(B) cross reference violated their right to due process and hence that the district court must have been authorized to depart downward from the resulting guideline range on that basis. 3 Because the Fenners have failed to identify any basis that the district court properly could employ to depart downward from their guideline ranges, we find no need to remand to the district court for further consideration of their sentences. Accordingly, we affirm the Fenners’ convictions and sentences. 4
AFFIRMED.
Notes
. The district court applied the second-degree murder guideline to Herbert because the court found that he did not intend to kill Holley.
. It is essential to recognize that " '[t]he Commission intend[ed] the sentencing courts to treat each guideline as carving out a "heartland,” a set of typical cases embodying the conduct that each guideline describes’ ” and to consider as potential bases for departure factors that take the case outside the heartland of the applicable guideline.
Koon,
518 Ú.S. at 93,
. The Fenners raised no argument concerning the standard of proof that must be satisfied in order to impose the enhancement resulting from the § 2K2.1(c)(1)(B) cross reference consistent with due process. This omission is no doubt the result of the district court finding beyond a reasonable doubt that the Fenners were responsible for Holley’s death. Because no question concerning the standard of proof is before the court, we express no view on this issue.
See Almendarez-Tones,
- U.S. at-,
. We have carefully considered the other arguments raised by the Fenners relating to their convictions and sentences and find them to be without merit.
