This сase presents an issue of first impression in this circuit: whether the absence of a scienter element in the sentencing enhancement for possession of a firearm with an obliterated serial number, § 2K2.1(b)(4) of the Sentencing Guidelines, violates substantive due process. We hold that it does not.
The facts of this case are straightforward. In 1984, James E. Schnell was convicted of filing a false income tax return in violation of 26 U.S.C. § 7606(1). The three-year term of imprisonment to which he was sentenced was suspended, and Schnell was placed on probation for four years and fined $5,000. Schnell’s probation was later revoked because he failed to file income tax returns for 1984 and 1985, and he was sentenced to ninety days imprisonment.
Schnell was advised that, as a convicted felon, he was forbidden to possess firearms. Nevertheless, on several occasions in 1987 and thereafter, Schnell sold pistols and revolvers from his home. In January 1991, agents of the Bureau of Alcohol, Tobacco, and Firearms raided Schnell’s house and retrieved 57 firearms, including handguns, rifles, and shotguns. One of the shotguns had an obliteratеd serial number.
Schnell pled guilty to violating 18 U.S.C. § 922(g)(1), which provides:
It shall be unlawful for any person — who has been convicted in any court of a crime punishable by imprisonment for a term exceeding one year ... to ship or transport in interstate or foreign commerce, or possess in or affecting commerce, any firearm or ammunition.
The relevant offense guideline for firearms violations is § 2K2.1, which the district court believed set a base level of 12 for the unlawful possession of a firearm by a felon. Section 2K2.1(b)(4) adds 2 levels when the firearm is stolen or has an altered or obliterated serial number. At his sentencing hearing, Schnell testified that he did not obscure the serial number of the single firearm, and that he was unaware that it had been оbscured. The guideline provision, however, contains no scienter requirement; the district court therefore awarded Schnell the 2-point enhancement, despite the lack of any evidence that he knew of the condition of the serial number. Combined with a 2-level decrease for acceptance of responsibility and a criminal history category of II, these computations yielded a sentencing range of 12-18 months. The district court sentenced Schnell to 12 months in prison.
I.
Before turning to the main constitutional question, we address a possible error in Schnell’s sentence raising the question of the retroactivity of amendments to the Sentencing Guidelines. The base offense level for violating 18 U.S.C. § 922(g) was, at the time of Schnell’s offense in early January 1991, 12. See U.S.S.G. § 2K2.1(a)(2) (Nov. 1990). On November 1, 1991, amendments took effect that changed various provisions of the firearms guidelines. Amendment 374, in particular, raised the base offense level in § 2K2.1 to 14 for firearms offenses committed by “prohibited person[s],” defined as individuals who have been convicted of crimes punishable by imprisonment for more than one yeаr. See U.S.S.G. § 2K2.1, comment, (n. 6) (Nov. 1991). The Commission explained that this amendment “revises the ... offense levels [of the firearms guidelines] to more adequately reflect the seriousness of such conduct.” U.S.S.G.App. C, amend. 374.
The government and Schnell worked out a plea agreement whereby Schnell would *218 plead guilty to one count of possession of a firearm by a felon. On November 13,1991, the parties submitted their agreement to the district court. Among other stipulated facts, they agreed that “Section 2K2.1 of the Sentencing Guidelines applies to this offense and establishes a base offense level of 12.” Memorandum of Plea Agreement at 4. The probation officer who prepared Schnell’s PSI in January 1992 continued to use the November 1990 guideline manual although the November 1991 manual was now two months old. In the section of his report titled “Offense Level Computation,” the officer wrote that “[t]he guideline for an 18: U.S.C. 922(a)(1) [sic ] offense is contained in 2K2.1 of the guidelines. That section provides a base offense level of 12.” At Schnell’s sentencing hearing, the district court adopted the factual findings in the PSI relating to the applicable guideline factors, including the base offense level, and pronounced sentence. It thereby violated 18 U.S.C. § 3553(a)(4), which requires courts to apply the guidelines that are in effect on the date the defendant is sentenced. 1
If Schnell’s sentencing had occurred in another circuit, there would have been no error. The other circuits unanimously аgree that the
Ex Post Facto
Clause of the Constitution prohibits application of a revised guideline when the version in effect on the date of the defendant's sentencing imposes a more severe penalty than the version in effect on the date of his offense.
See United States v. Harotunian,
This circuit, on the other hand, has sent inconsistent signals on the question. One panel of this court initially stated, in diсtum, that the
Ex Post Facto
Clause prohibited retroactive application of a revised guideline when the change would disadvantage the defendant.
See United States v. Bradach,
Although the guidelines influence the exercise of discretion within the statutory range, judges may depart at appropriate times. On this understanding, a change in the sentencing guidelines is no different from, say, the institution of a get-tough policy under which the prosecutor no longer acceрts pleas to lesser offenses, or the appointment of a new judge who favors longer sentences, or a change in the guidelines for parole, ... or a decision by the President to cease commuting the sentences of a class of felons. All of these may increase the time a criminal spends in prison without transgressing the ban on ex post factо laws.
Id. (citation omitted). Since then, we have occasionally cited Golden or Bader without *219 much discussion, but in no case where an amended guideline worked a disadvantage to the defendant. 2
If it was error here to use the 1990 edition of the guideline manual, this court may reverse even if neither party objected in the district court.
See United States v. Belanger,
Much аs we would like to settle once and for all the question of how the
Ex Post Facto
Clause affects the Sentencing Guidelines, this case is an inconvenient vehicle, since we lack the benefit of briefing on this issue due to the unexpected way the question arose. We acknowledge, however, that
Bader
remains inconsistent with the views of eleven circuits, and we call attention to a recent decision,
United States v. Bell,
II.
Defendants in several circuits have tried a number of statutory and constitutional arguments to challenge the absence of a
mens rea
element in § 2K2.1(b)(4).
3
To this point, none has found success.
See United States v. Mobley,
*220
In a celebrated statement, the Supreme Court has held that “[t]he existence of
mens rea
is the rule of, rather than the exception to, the principles of Anglo-American criminal jurisprudence.”
Dennis v. United States,
Here, however, the guideline is unambiguous. As the
Mobley
and
Taylor
courts have demonstrated, both the structure and the history of the guidelines clearly show that the Sentencing Commission intended to omit the element of
mens rea
in § 2K2.1(b)(4). To begin with, the language of the section itself makes no reference to mental states. By contrast, an earlier incarnation of one of the firearms guidelines, later consolidated into the present § 2K2.1, prescribed an enhancement when “the defendant knew or had reason to believe that a firearm was stolen or had an altered or obliterated serial number.” U.S.S.G. § 2K2.3(b)(2)(C) (Nov. 1987);
see Mobley,
It is true that Congress included a scienter element in the definitions of the offense of bеing a felon in possession of a firearm, 18 U.S.C. § 922(g), and the offense of possession of a firearm with an altered or obliterated serial number, 18 U.S.C. § 922(k).
See Mobley,
It is nо secret that a chain of custody for a firearm greatly assists in the difficult process of solving crimes. When a firearm is stolen, determining this chain is difficult and when serial numbers are obliterated, it is virtually impossible. Therefore, stolen or altered firearms in *221 the hands of people recognized as irresponsible pose great dangers, and the guideline here refleсts this heightened danger.
Mobley,
Legislatures have plenary power to define the terms of criminal offenses.
See Chicago, B. & Q. Ry. v. United, States,
Indeed, statutes that enhance penalties for previously defined offenses when certain aggravating circumstances are present, whether or not the defendant is aware of the circumstances, are neither new nor uncommon. Examples include the “schoolyard statute,” 21 U.S.C. § 860, which enhances the penalty for distribution of drugs when the sale occurs within 1000 feet of a school, regardless of the defendant’s knowledge of the proximity,
see United States v. Holland,
Congress could have added, constitutionally, a new subsection to the criminal code, say 18 U.S.C. § 922(s), providing that if a felon pоssesses a firearm that has an obliterated serial number, he will receive a higher penalty, whether or not he knows that the gun has been altered. The fact that it did not, and instead the Sentencing Commission wrote a guideline accomplishing the same thing, makes no constitutional difference. Some critics have argued that the Sentencing Guidelines scheme offends due process because it treats too many offense characteristics as sentencing factors rather than as substantive elements of a crime, thereby allowing prosecuting authorities to circumvent the rigorous procedural protections available to defendants in trials, such as an elevated burden of proof, heightened reliability of evidence, rights of confrontation, and so on. See Gerald W. Heaney, The Reality of Guidelines Sentencing: No End to Disparity, 28 Am. Crim.L.Rev. 161, 208-24 (1991); Note, An Argument for Confrontation Under the Federal Sentencing Guidelines, 105 Harv. L.Rev. 1880 (1992). Whatever validity these charges might have in other contexts, they cannot stand up here. Even if Congress made the firearm’s obliterated serial number an element of a substantive firearms offense, it could still omit the element of mens rea, as explained above, without running afoul of the Constitution. Defendants are in no worse a position because having an obliterated serial number is merely a sentencing factor.
III.
We hold that § 2K2.1(b)(4) of the Sentencing Guidelines comports with substantive due process. Sehnell’s sentence is therefore Affirmed.
Notes
. It is possible that some or all of the participants in Schnell’s sentencing thought it was corrеct to apply the guidelines in effect on the date of Schnell’s offense, rather than the date of his sentencing. While nearly all the other circuits have stated so, this circuit has not ruled definitively on the question, as discussed below. In any case, none of the pertinent sentencing documents in this case show any awareness of the potential issue.
.
See United States v. Foutris,
. This subsection was designated § 2K2.1(b)(2) until November 1, 1991 and in the following cases. The 1991 round of amendments made slight changes to the provision, prescribing an enhancement if "any” firearm, rather than “the” firearm, was stolen or had an obliterated serial number.
.Eaсh of these cases involved stolen guns rather than guns with obliterated serial numbers. Since § 2K2.1(b)(4) explicitly refers to both categories of firearms, this distinction should be irrelevant. In any event, possession of a gun with an obliterated serial number is even less defensible than possession of one that is stolen. A stolen gun often shows no visible sign of being stolen, while a gun with an obliterated serial number by itself notifies its possessor of its condition.
