Appellant Antone Raymond Austin pled guilty to one count of possession of a firearm by a prohibited person in violation of 18 U.S.C. § 922(g)(1). He appeals the en-
*1267
haneement of his sentence based on his prior Colorado conviction for sexual assault on a child, which he contends the district court improperly characterized as a crime of violence, in violation of the Supreme Court’s decision in
United States v. Booker,
543 U.S.-,
I. Background
In his plea agreement, Mr. Austin agreed to plead guilty to possession of a firearm by a prohibited person in violation of 18 U.S.C. § 922(g)(1), but disputed the government’s contention his sentence should be increased based on his prior Colorado state conviction for “Attempted Sexual Assault on a Child” under Colorado Revised Statute § 18-3-405(1), which he asserted did not constitute a “crime of violence” as proscribed by United States Sentencing Commission,
Guidelines Manual
(U.S.S.G.) § 2K2.1(a)(2) and defined under U.S.S.G. § 4B1.2 and its commentary. The probation officer who prepared the presentence report nonetheless recommended a base offense level increase of four levels, from 20 to 24, based on the prior Colorado conviction, which he characterized as a “crime of violence” but also noted involved a legal issue for the court to determine. Prior to the sentencing hearing, the Supreme Court issued its decision in
Blakely v. Washington,
The district court held a sentencing hearing at which it denied Mr. Austin’s objections to the mandatory application of the Sentencing Guidelines and the characterization of his prior state conviction as a “crime of violence.” Rather than considering any of the alleged facts underlying the prior conviction as contained in the presen-tence report and an affidavit submitted in the state case, 1 the district court instead considered only the statutes involved and the charging documents, including Mr. Austin’s admissions at his state court plea and sentencing hearing, to determine if his prior conviction met the definition of a “crime of violence” under U.S.S.G. §§ 2K2.1 and 4B1.2.
The statute to which Mr. Austin pled guilty, Colorado Revised Statute § 18-3-405(1), is titled “Sexual assault on a child” and states: “[a]ny actor who knowingly subjects another not his or her spouse to any sexual contact commits sexual assault on a child if the victim is less than fifteen years of age and the actor is at least four years older than the victim.” Under Colorado law “sexual contact” is defined as:
[T]he knowing touching of the victim’s intimate parts by the actor, or of the actor’s intimate parts by the victim, or the knowing touching of the clothing covering the immediate area of the victim’s or actor’s intimate parts if that sexual contact is for the purposes of sexual arousal, gratification, or abuse.
*1268 Colo.Rev.Stat. § 18-3-401(4). A corresponding statute entitled “Unlawful sexual contact” states:
Any person who knowingly, with or without sexual contact, induces or coerces a child by any of the means set forth in section 18-3-402 to expose intimate parts or to engage in any sexual contact, intrusion, or penetration with another person, for the purpose of the actor’s own sexual gratification, commits unlawful sexual contact. For the purposes of this subsection (1.5), the term “child” means any person under the age of eighteen years.
See Colo.Rev.Stat. § 18-3-404(1.5). In addition, in Colorado, consent of both parents is required for a person under the age of eighteen to marry, and a person must be eighteen years of age to be competent to contract, manage his or her estate, sue and be sued, and make decisions regarding his or her own body. See Colo.Rev.Stat. § 14-2-106 (regarding parental consent) and § 13-22-101 (concerning age of competency).
The formal charging document or “information” to which Mr. Austin pled guilty charged him with a class 4 felony for subjecting another person to “sexual contact” when that person was less than fifteen years old and Mr. Austin was at least four years older. During Mr. Austin’s state plea and sentencing hearing, he pled guilty to attempted sexual assault on a child, a class 5 felony, and made the following admissions: 1) he touched the child’s vagina; 2) she was at a slumber party with his sister; 3) he knew what he was doing at the time; 4) he was not married to the girl; 5) she was less than fifteen at the time; 6) he was at least four years older than the girl; and 7) he touched her vagina for his own sexual gratification.
The district court considered the applicable statutes, charging document, and Mr. Austin’s admissions in light of the applicable Sentencing Guidelines definition of a “crime of violence,” which, under U.S.S.G. § 4B1.2, states:
The term “crime of violence” means any offense under federal or state law, punishable by imprisonment for a term exceeding one year, that—
(1) has as an element the use, attempted use, or threatened use of physical force against the person of another, or
(2) ... otherwise involves conduct that presents a serious potential risk of physical injury to another.
U.S.S.G. § 4B1.2(a)(1) and (2). In addition, it recognized that commentary note 1 to § 4B1.2 states a “crime of violence” includes “forcible sex offenses.” U.S.S.G. § 4B1.2 cmt. n. 1.
In applying this definition, the district court acknowledged attempted sexual assault on a child under Colorado Revised Statute § 18-3-405(1) does not have as an element the use, attempted use, or threatened use of physical force against the victim, or constitute a “forcible sex offense” as specifically enumerated. However, it found the crime, both “[o]n this record” and “given the available case law,” presented a serious potential risk of physical injury to the victim and therefore constituted a “crime of violence” within the meaning of § 4B1.2(a)(2).
After determining Mr. Austin’s Colorado conviction met the definition of a “crime of violence,” the district court refused to grant Mr. Austin’s motion for a downward departure under U.S.S.G. § 5K2.0, stating it did not “find that the defendant or his concomitant circumstances, including but not limited to his criminal history, constitute or qualify as mitigating circumstances of a kind or to a degree not adequately considered by the Sentencing Commission in formulating the apposite guideline, citing guideline section
5
K2.0 and 18 U.S.C. section 3553(b).” It held that “under the
*1269
analysis provided by the United States Supreme Court in
Koon [v. United, States,
Mr. Austin now appeals his sentence on grounds the district court erred in characterizing his prior conviction as a “crime of violence” and mandatorily applying the Sentencing Guidelines to determine his sentence. The government concedes the district court erred in mandatorily sentencing Mr. Austin under the applicable Sentencing Guidelines, but nevertheless continues to contend Mr. Austin committed a “violent crime” under the “otherwise ... risk of physical injury” prong of the § 4B1.2 definition.
II. Discussion
A. Arguments Concerning Characterization of Prior Conviction
In contesting the characterization of his prior conviction as a “crime of violence,” Mr. Austin suggests Colorado Revised Statute § 18-3-405(1) is ambiguous as to whether he committed a violent crime because it covers both invasive and noninvasive sexual assault conduct. He bases this premise on the fact the statute contains as an element “sexual contact,” which includes the mere touching of a child’s intimate parts through “clothing” and which, he contends, does not otherwise “involve conduct which presents a serious potential risk of physical injury” to another. In addition, Mr. Austin contends lack of consent cannot be considered because it is not an element of § 18-3-405(1). While Mr. Austin acknowledges he admitted at his plea hearing to touching the minor girl’s vagina, he insists we should only apply a “least culpable” act test and assume he did the least culpable act possible for conviction under the statute, which would involve the mere consensual touching of a young girl’s clothing covering her intimate parts. Mr. Austin further suggests, without supporting evidence in the charging document or in his admissions, that the facts in this case establish the age difference between himself and the girl involved was “just barely over ... four years” and that the conduct “was somewhat consensual in nature.” Mr. Austin further asserts no “aggravating” circumstances warrant characterizing his conduct as a “crime of violence” because the victim was not under the age of twelve, the act did not involve incest, and he was not an adult family friend or relative. As an example, he suggests the situation was like “two teenagers in the same high school engaging in consensual touching of the clothing covering the girl’s intimate parts” which, he contends, would certainly not constitute a “crime of violence.” Finally, he contends the government failed to carry its burden in offering medical or statistical evidence to show a girl of fourteen, or almost fifteen, could be physically injured by sexual contact involving the mere touching of her intimate parts through her clothing.
The government relies on this and other circuit court precedent to urge us to make a per se determination that, by its nature, the statutory conduct for which Mr. Austin *1270 pled guilty constitutes a “crime of violence” or, alternatively, that his factual admissions establish he committed a “crime of violence.” Based on Mr. Austin’s own admissions, the government contends he committed a “crime of violence” and contests his characterization of the offense as “consensual” and involving the mere touching of the “clothing” covering the girl’s intimate parts. It also points out that the “least culpable” analysis suggested by Mr. Austin would be warranted only in situations where the statutory definition, charging documents, and defendant’s admissions are all ambiguous.
B. Law Regarding Categorical Characterization of Prior Conviction
During Mr. Austin’s appeal, the Supreme Court issued
United States v. Booker,
which applies its ruling in
Blakely
to the Federal Sentencing Guidelines. 543 U.S. at -,
Similarly, with respect to the characterization of prior convictions as crimes of violence, we have determined it involves a question of law and not fact and therefore does not implicate the Sixth Amendment for the purpose of requiring the characterization of the offense to be charged in the indictment and proven to a jury.
See Moore,
Since our decision in
Hernandez-Rodriguez
and the Supreme Court’s decisions in
Taylor, Blakely,
and
Booker,
the Supreme Court has looked at the categorical approach and exceptions thereto in the context of situations where, like here, the defendant pled guilty to a prior offense.
See Shepard,
— U.S. at-,
Here, the categorical approach begins with an examination of Colorado Revised Statute § 18-3-405 and its corresponding statutes and, under such an approach, we determine whether a conviction thereunder constitutes a “crime of violence” as defined under § 4B1.2. “We review the district court’s interpretation of the Sentencing Guidelines
de novo.” United States v. Herrera-Roldan,
We agree with the district court that § 18-3-405 does not contain the elements outlined in § 4B1.2 because it does not require the “use, attempted use, or threatened use of physical force against the person of another.” U.S.S.G. § 4B1.2 cmt. n. 1. The government also does not suggest Mr. Austin’s statutory or admitted conduct fits within the expressly enumerated example of “forcible sex offenses” and therefore we do not address it. 2 Rather, both parties concentrate on the second prong of § 4B1.2 to determine whether Mr. Austin’s prior conviction “otherwise involve[s] conduct that presents a serious potential risk of physical injury to another.” U.S.S.G. § 4B1.2(a)(2).
C. Tenth Circuit Court Precedent
In asking us to make a
per se
determination that the nature of the crime at issue, sexual contact with a child under the age of fifteen, is inherently a “crime of violence,” the government relies on an array of Tenth Circuit cases, including
United States v. Coronado-Cervantes,
In
Coronado-Cervantes,
the defendant admitted, in part, to knowingly engaging in sexual contact with a girl under the age of twelve by intentionally touching her genitalia, anus, groin, breast, inner thigh, and buttocks with an intent to gratify his sexual desires.
Mr. Austin argues
Reyes-Castro
and
Coronado-Cervantes
are both distinguishable. As he points out,
Reyes-Castro
involved an incestuous act by the defendant who sexually abused his own twelve-year-old daughter,
see
However, as Mr. Austin suggests, both cases rely on 18 U.S.C. § 16, which defines a “crime of violence” differently than U.S.S.G. § 4B1.2. In explaining the differences, we have determined the § 4B1.2(a)(2) definition involving the “risk of resulting
physical injury
” is much broader than the § 16(b) definition involv
*1273
ing the “risk of
physical force
... in the course of committing the offense,” which we held requires “destructive or violent force.”
See United States v. Venegas-Ornelas,
The government counters by pointing out that this court has repeatedly held § 16 cases provide persuasive value in § 4B1.2 sexual abuse cases. In support, it relies not only on
Coronado-Cervantes,
but
United States v. Vigil,
In focusing on § 4B1.2 and the risk of physical injury prong, the government directs us to
United States v. Rowland,
Comparing the underlying statutory elements in this and the Rowland case, it is clear the instant ease contains more “aggravating” elements than Rowland because the victim here was at least two years younger than the victim in Rowland, and the Colorado statutes at issue pertain to the touching of a minor’s intimate parts, not merely any body parts, as did the Oklahoma statute. Given we held in Rowland that the nonconsensual touching of any body part of a person sixteen years of age or older may entail a serious risk of physical injury under § 4B1.2, we find it difficult to reconcile that the touching of the intimate parts (which in this case was the victim’s vagina) of someone less than fifteen years old would not likewise potentially cause a risk of physical injury. While Mr. Austin points out that Rowland was based, in part, on lack of consent, we discern little difference because Colorado has determined eighteen to be the age o.f consent; therefore, under its statutes, a person under the age of fifteen cannot consent. See Colo. Rev. Stats. § 18-3-404(1.5) (stating that for sexual assault cases “child” means any person under the age of eighteen); § 14-2-106 (regarding parental consent required for marriage under the age of eighteen); and § 13-22-101 (identifying eighteen as age of competency).
The government also asks us to consider our unpublished opinion in
United States v. Daniels,
in which this court determined that a prior conviction under the same Colorado statutes at issue here constituted a “crime of violence” under § 4B1.2.
While
Daniels
may lack precedential value, it nevertheless has some persuasive value. Like Mr. Austin, Mr. Daniels asserted his prior conviction under the identical Colorado statute could not constitute a crime of violence because his conviction involved “sexual contact,” and such contact with a child under the age of fifteen does not present a risk of physical injury.
By statute, the State of Colorado has defined a person under the age of eighteen variously as a child or a person incapable of consent. In crafting § 18-3-405, the Colorado legislature has purposefully chosen to further protect a more narrow group, children under the age of fifteen. In doing so they recognized the risks present in non-consensual contact with a child fourteen or younger.
Id. at 300-01 (footnote omitted).
The government also directs us to our decision in
McCann
for the purpose of discussing the injuries sustained by either minors or adults experiencing sexual abuse.
D. Other Circuit Precedent
Having discussed relevant Tenth Circuit decisions, both parties direct us to decisions of other circuits in support of their arguments. The government relies, in part, on decisions pertaining to § 16 and the risk of use of physical force. Because of our previous concerns with “collapsing the distinction” between the differently-worded definitions in 18 U.S.C. § 16 and U.S.S.G. § 4B1.2,
see Lucio-Lucio,
On the other hand, as the government points out and we acknowledged in
Coronado-Cervantes,
Similarly, at least one circuit has determined sexual assault of a minor of a particular age constitutes a “crime of violence” under 18 U.S.C. §§ 924(c) and 924(e), which, like § 4B1.2, also define a “crime of violence” and “violent felony” as those crimes that present a serious potential risk of physical injury to another.
See United States v. Mincks,
However, as Mr. Austin contends, a few circuits have questioned whether sexual assault on a minor of a particular age constitutes a “crime of violence” under U.S.S.G. § 4B1.2 or a “violent felony” under 18 U.S.C. § 924(e). In those cases, the courts have refused to adopt a
per se
or bright line test but appear to prefer a case-by-case determination, considering all aggravating factors, including the specific age of the child, the risk of injury to a minor of that age, and the age difference between the minor and the perpetrator. For instance, in
United States v. Houston,
the Fifth Circuit examined a Texas statute prohibiting contact with or penetration of the sexual organ of a child under the age of seventeen with the mouth, anus, or sexual organ of another, and the fact that being not more than three years older than the victim was an affirmative defense.
In
United States v. Thomas,
the Seventh Circuit determined
the government
failed to provide medical or other evidence to establish any risk of physical injury, as required under § 924, in a case involving a defendant convicted under an Illinois stat
*1277
ute prohibiting sexual intercourse with a woman under the age of seventeen and more than five years younger than the man.
Finally, in
Shannon,
the defendant was convicted for second-degree sexual assault under a Wisconsin law prohibiting either sexual contact or intercourse with a person under the age of sixteen.
It is the latter determination in
Shannon
on which Mr. Austin relies in arguing his prior conviction for mere consensual touching of the clothing covering his victim’s intimate parts cannot constitute a “crime of violence.” However, when this court decided
Rowland,
we exhaustively discussed the Seventh Circuit’s decision in
Shannon,
noting it was instructive but not controlling, and explaining the distinguishing factors involved, including the fact the court in
Shannon
did not consider the “goals or grounds” behind the passage of the Wisconsin statute, but looked beyond it to the charging document involved and
*1278
what it considered aggravating circumstances.
See
E. Application of Law to Instant Case
With the exception of the- few circuit court decisions favoring Mr. Austin’s position, and without delving further into the underlying rationale of the other decisions discussed, it is clear the weight of our and other circuits’ decisions favors the government’s position that sexual abuse of a statutorily-protected, specific age group of minors, including abuse through sexual contact, is generally, by its nature, considered a “crime of violence.” Regardless of our own beliefs about whether the touching of a fourteen-year-old’s intimate parts by a person at least four years older is a
“crime of
violence,” we are bound by our clear precedent
4
in
Rowland,
However, we need not make any such determination in the instant case. Even if we agree with Mr. Austin that the statute of conviction covers a nonviolent crime because it includes the touching of “clothing” covering a child’s intimate parts, Mr. Austin’s prior conviction still meets the definition of a “crime of violence” based on his admissions at his plea and sentencing hearing, which presented aggravating circumstances beyond what he terms the “least culpable” conduct under the statute of conviction.
Specifically, Mr. Austin’s prior admissions show the encounter involved more than his description of two high school teenagers engaged in a provocative form of heavy petting including consensual sexual contact through the mere touching of the clothing covering the female’s intimate parts. First, neither the charging document nor Mr. Austin’s admissions disclose either his or the victim’s exact ages, although we accept his assertion he was nineteen. 6 Mr. Austin’s asserted age, to *1279 gether with his admissions at the plea hearing, clearly establish he pled guilty to attempted sexual assault; his victim was under the age of fifteen; he was at least four years older than the victim (and, at nineteen, was considered an adult under Colorado law); the act involved the actual physical touching of the minor girl’s vagina (and not her clothing) 7 for his own sexual gratification; and she was with his sister for the purpose of attending a slumber party and not for a teenage sexual liaison. It is apparent that, because of his adult age, familial relationship with his sister, and the fact the slumber party involved his sister’s friend, he was an adult family friend or at least enjoyed a position of trust which he abused when he sexually assaulted the minor girl. Clearly, when a girl under the age of fifteen attends something as innocent as a slumber party, no one expects her to experience sexual assault by someone at least four years her senior who goes beyond touching her clothing in a provocative, sexual way, to actual, physical sexual contact with her vagina for his own admitted sexual gratification.
Moreover, we must reject Mr. Austin’s assertion the act was consensual, given Colorado has determined a person under the age of eighteen is incapable of such consent. Colo. Rev. Stats. §§ 13-22-101; 14-2-106; 18-3-404(1.5). In addition, our determination is bolstered by the commonly accepted determination that sexual abuse of children “typically occur[s] in close quarters and [is] generally perpetrated by an adult upon a victim who is not only smaller, weaker, and less experienced, but is also susceptible to acceding to the coercive power of adult authority figures.”
United States v. Melton,
In addition, Mr. Austin fails to reconcile his argument the government must provide medical or other evidence that touching the vagina of a girl less than fifteen years old could cause physical injury with our precedent in
Rowland,
holding the mere nonconsensual touching of the body parts of a victim over the age of sixteen, as prohibited by state statute, created a risk of physical injury under § 4B1.2,
see
Finally, for the purposes of this case, we reject Mr. Austin’s request we must employ what he calls the “least culpable” act test to assume he did the very least culpable act possible for conviction under the statute, which he contends involves the mere touching of the young girl’s clothing over her intimate parts. It is clear that if we employed such a test to an ambiguous statute without consideration of the charging and related documents, our review of those documents and a defendant’s admissions would be superfluous, because the least culpable act would always likely meet the nonviolent crime provision of any ambiguous statute. Thus, based on Mr. Austin’s admissions, we decline to apply Mr. Austin’s least culpable act test to the circumstances of this case to arrive at a final disposition of the issues.
For the foregoing reasons, we conclude Mr. Austin’s prior conviction constitutes a “crime of violence” for the purpose of increasing his sentence under U.S.S.G. §§ 2K2.1 and 4B1.2.
F. Sentence Length
Because Mr. Austin raised his claim concerning the mandatory application of the Sentencing Guidelines during the district court proceedings, we review it for harmless error.
See United States v. Labastida-Segura,
In this case, Mr. Austin contends, and the government concedes, that despite Mr. Austin’s Blakely objection at sentencing, the district court mandatorily applied the Sentencing Guidelines in determining his sentence length and then sentenced him at the bottom of the guidelines range. Given he was sentenced at the bottom of the range, the government summarily concedes our decision in Labastida-Segura dictates and Mr. Austin’s sentence length *1281 must be remanded for consideration in light of both Booker and Blakely.
Because the burden of demonstrating harmless error is on the government in this case, and it has conceded such error, we are inclined to remand Mr. Austin’s sentence to the district court for a determination under an advisory Sentencing Guidelines scheme as to the range and subsequent length of Mr. Austin’s sentence in accordance with the Supreme Court’s decision in Booker.
III. Conclusion
For the foregoing reasons, we AFFIRM Mr. Austin’s sentence with respect to his prior conviction constituting a “crime of violence” but otherwise REMAND his sentence for a determination in accordance with Booker and this decision.
Notes
. Initially, the government asked us to consider several inculpatory assertions in the arrest warrant affidavit and similarly directed us to a later pretext telephone call in which Mr. Austin allegedly made inculpatory statements. However, in light of the Supreme Court’s decision in
Shepard v. United
States,-U.S. -,
. While the government does not specifically contend Mr. Austin's conduct meets the enumerated definition of “forcible sex offenses,” it nevertheless directs our attention to
United States
v.
Munguia-Sanchez,
. In
Coronado-Cervantes,
the cases we relied on included
United States v. Meader,
.While admittedly the four decisions on which Mr. Austin primarily relies and which focus on aggravating factors provide persuasive value, we are bound to follow our court precedent, absent
en banc
reconsideration or a superceding contrary decision by the Supreme Court.
See Tootle v. USDB Commandant,
. As explained hereinafter, we need not determine whether the touching of the clothing covering a minor's intimate parts constitutes a "crime of violence," as Mr. Austin's admissions establish he did not merely touch the victim’s clothing, but her vagina.
. Just as we cannot consider underlying facts of the prior conviction which allege Mr. Austin penetrated his victim with more than his finger, we similarly cannot rely on Mr. Austin's allegations his victim was fourteen, as *1279 those facts are not contained in the charging documents or his admissions. We know only from his admission and the charging document that she was under the age of fifteen. We nevertheless accept his assertion he was nineteen, assuming he knew his own age at the time of the incident, and given he was not charged as a juvenile.
. Because Mr. Austin explicitly admitted to touching the child's vagina, without further qualifying his admission by stating he touched only her clothing, his argument that we should consider only the least culpable act of touching only her clothing is not well taken and is an impermissible attempt to reconstruct his own admission after the fact. Like his other admissions, we consider only the plain or literal meaning of the words spoken, which in this case is that he touched her vagina.
. This is evidenced not only by the statute under which Mr. Austin was convicted, which establishes a narrow group of children under the age of fifteen it intends to protect, but the fact that the Colorado legislature has deemed the age of consent to be eighteen, which is higher than many other states where courts have examined statutory law concerning sexual contact with a minor.
See, e.g., Rowland,
