Jose Bonilla-Mungia (“Bonilla”) pleaded guilty to being unlawfully present in the United States following deportation and was sentenced to 41 months’ imprisonment. He now appeals the sentence imposed by the district court, asserting that the court plainly erred by enhancing his sentence sixteen levels for a prior “crime of violence.” He also appeals his conviction by challenging the constitutionality of the “felony” and “aggravated felony” enhancement provisions of 8 U.S.C. § 1326(b). For the reasons stated below, we affirm Bonilla’s conviction, vacate his sentence, and remand for development of the record.
I.
On June 7, 2003, Bonilla pleaded guilty to being unlawfully present in the United States after being previously deported, in violation of 8 U.S.C. § 1326(a) and (b). In the presentence report (“PSR”), the probation officer recommended a base offense level of eight pursuant to the U.S. Sentencing Guidelines Manual (“U.S.S.G.”) § 2L1.2(a) (2002). The PSR also included a recommendation for a sixteen-level enhancement under U.S.S.G. § 2L1.2(b)(l)(A)(ii) on the ground that Bonilla’s 2000 conviction for sexual battery in California was a prior “crime of violence.” After a three-level reduction for acceptance of responsibility, the probation officer recommended a sentencing range of 57 to 71 months. The district court adopted the recommendations contained in the PSR, applied a two-level downward departure for Bonilla’s cooperation with the Government, and sentenced him to 41 months’ imprisonment. Bonilla timely appealed.
II.
A.
Bonilla argues that his conviction must be overturned because the felony and aggravated felony provisions contained in 8 U.S.C. § 1326 are unconstitutional. He concedes that this argument is foreclosed by
Almendarez-Torres v. United States,
Apprendi
did not overrule
Almendarez-Torres. See Apprendi,
B.
Bonilla also argues that the district court improperly enhanced his sentence under U.S.S.G. § 2L1.2(b)(l)(A)(ii) by classifying his 2000 California conviction for sexual battery as a crime of violence. Because he failed to raise this issue in the district court, we review for plain error.
The Government urges us to refrain from addressing this issue on the ground that Bonilla waived any objection to his crime-of-violence enhancement at sentencing. However, the Government did not raise this waiver argument in its brief. Rather, it addressed the merits of Bonil-la’s enhancement under a plain error standard of review. After the parties filed their briefs, we decided
United States v. Calderon-Pena,
We reject the Government’s waiver argument for two reasons: it is unresponsive to our questions on supplemental briefing, and it was untimely. Just as we will not entertain issues first raised by an appellant in his reply brief,
United States v. Brown,
Section 2L1.2(b)(l)(A)(ii) of the Guidelines provides for a sixteen-level enhancement of a defendant’s sentence if the defendant was previously deported or remained in the United States after “a conviction for a felony that is ... a crime of violence.” U.S.S.G. § 2L1.2(b)(l)(A)(ii) (2002). 2 The commentary to § 2L1.2 defines a “crime of violence” as follows:
A “crime of violence”
(I) means an offense under federal, state, or local law that has as an ele *320 ment the use, attempted use, or threatened use of physical force against the person of another; and
(II) includes murder, manslaughter, kidnapping, aggravated assault, forcible sex offenses (including sexual abuse of a minor), robbery, arson, extortion, extortionate extension of credit, and burglary of a dwelling.
U.S.S.G. § 2L1.2, cmt. n. l(B)(ii)(I) & (II) (2002) (emphasis added).
Bonilla contends that his California conviction for sexual battery does not constitute a crime of violence under U.S.S.G. § 2L1.2 because it does not have as an element the use, attempted use, or threatened use of physical force against the person of another; and it is not equivalent to a “forcible sex offense.” 3
When determining whether a prior offense is a crime of violence because it has as an element the use, attempted use, or threatened use of force, district courts must employ the categorical approach established in
Taylor v. United States,
Thus, to decide whether the district court’s crime-of-violence enhancement was proper, we must answer the following questions: First, what particular offense was Bonilla convicted of? Second, does that offense require proof of the use, attempted use, or threatened use of physical force; or can it be categorized as a forcible sex offense?
Bonilla was convicted of sexual battery under the 1998 version of California Penal Code § 243.4, which lists three discrete methods of committing felony sexual battery.
5
Unfortunately, the record does
*321
not tell us which subsection of § 243.4 applies to Bonilla’s conviction. The PSR contains facts pertaining to Bonilla’s alleged conduct in committing the underlying offense. We will not consider these facts, however, because they are not explicit findings of the California court made or used in adjudicating Bonilla’s guilt.
Garza-Lopez,
In
United States v. Martinez-Paramo,
we were presented with a similar predicament.
Likewise, on the record before us, we cannot identify with legal certainty which portion of the sexual battery statute Bonil-la was convicted under. We are therefore unable to determine whether his crime-of-violence enhancement is sustainable; that is, whether Bonilla’s conviction required proof of the use of force, or whether it can be categorized as a forcible sex offense under U.S.S.G. § 2L1.2(b)(l)(A)(ii). Accordingly, we remand to the district court for supplementation of the record. 6
C.
On remand, the district court should order the Government to supplement the record with documents that might establish which elements Bonilla pleaded guilty to.
See Martinez-Paramo,
III. CONCLUSION
Accordingly, we VACATE Bonilla’s sentence and REMAND for resentencing consistent with this opinion.
VACATED and REMANDED.
Notes
.
See United States v. Menesses,
. In determining Bonilla's sentence, the district court applied the 2002 version of the Guidelines.
. The only enumerated offense under U.S.S.G. § 2L1.2, cmt. n. l(B)(ii)(II) that might describe California's offense of sexual battery is "forcible sex offense.”
. In cases where the defendant did not plead guilty but was convicted by a jury, courts may also consider the jury instructions in order to determine whether an enhancement is implicated under the Guidelines.
See Taylor,
. Section 243.4 provides as follows:
(a) Any person who touches an intimate part of another person while that person is unlawfully restrained by the accused or an accomplice, and if the touching is against the will of the person touched and is for the purpose of sexual arousal, sexual gratification, or sexual abuse, is guilty of sexual battery!;]
(b) Any person who touches an intimate part of another person who is institutionalized for medical treatment and who is seriously disabled or medically *321 incapacitated, if the touching is against the will of the person touched and is for the purpose of sexual arousal, sexual gratification, or sexual abuse, is guilty of sexual batteryf;]
(c) Any person who, for the purpose of sexual arousal, sexual gratification, or sexual abuse, causes another, against that person’s will while that person is unlawfully restrained either by the accused or an accomplice, or is institutionalized for medical treatment and is seriously disabled or medically incapacitated, to masturbate or touch an intimate part of either of those persons or a third person, is guilty of sexual batteryf.]
Cal.Penal Code § 243.4 (West 1998). Section 243.4(d) sets forth the offense of misdemean- or sexual battery. That subsection is inapplicable to our analysis here because Bonilla's two-year prison sentence indicates that he was convicted of felony sexual battery. Cal Penal Code § 243.4 (West 1998).
. Bonilla also argues in supplemental briefing that the district court erred by mandatorily applying the Guidelines, which the Supreme Court held to be merely advisory in
United States v.
Booker, - U.S. -,
