Affirmed by published opinion. Judge MOTZ wrote the opinion, in which Judge WILKINSON and Judge HARWELL joined.
Ronald Forrest challenges his conviction for the sexual exploitation of a child in violation of 18 U.S.C.A. §§ 2251(a) and 2252A(a)(5)(b) (West 2000). He contends that Congress’s Commerce Clause authori *76 ty does not extend to his private, intrastate production and possession of child pornography, and that the district court erred in admitting certain photographs and expert testimony. Forrest also maintains that his sentence should be vacated and remanded because the district court mistakenly believed the then-mandatory Sentencing Guidelines required imposition of a prison term. We reject each of these arguments, and affirm the judgment of the district court.
I.
Forrest was the Chief of Police of the Seat Pleásant, Maryland Police Department. He met the victim, Steven, through the department’s Junior Police Program. Steven helped found the program because he hoped to become a police officer and wanted to learn more about police work. Initially, the two interacted only when Forrest oversaw the program’s activities on weekends. Eventually, however, Steven asked if he could come over to Forrest’s house. Forrest agreed. Steven would go to Forrest’s house either to do chores (such as mowing the lawn) or to “go[ ] out somewhere” with him. Beginning in January 2001, around the time Steven turned thirteen, he started spending the night at Forrest’s house. When Forrest’s daughter was away, Steven would sleep in her room, but when she was home he would stay with Forrest in his room. Through these visits, Steven, who had never lived with his own father, came to view Forrest as a father figure.
Steven asked Forrest to take pictures of him to give to his girlfriend. Forrest took digital pictures of Steven, who was clothed at the time, while an X-rated movie played in the background. That same day, Forrest asked if he could take semi-nude photographs of Steven. Originally, Steven refused but agreed after Forrest asked repeatedly and offered to pay Steven between $50 and $80. Forrest then asked to take fully nude photographs of Steven. Steven again refused, but agreed after Forrest offered to pay him more money.
On a separate occasion, Forrest used a Polaroid camera to take pictures of Steven lying on Forrest’s bed. In some of the polaroids Steven was clothed, but in others he was unclothed. Forrest again offered Steven between $50 and $80 to pose for these pictures. Steven also testified that Forrest twice attempted to assault him sexually, once in Forrest’s bedroom and once in his office.
In 2003, Forrest’s fiancee suspected him of infidelity. While searching his house for evidence, she discovered a photo album in his home office. The album included pictures of Steven and another young man she recognized, as well as nude photographs of the fiancee herself. It also contained pictures of adult males; those images bore the logo of a website called “Rude Jam.” She left the album at Forrest’s house, but returned a few days later to retrieve the album and turn it over to the FBI. Before turning it over, she removed the nude pictures of herself from the album because they embarrassed her.
FBI officers subsequently searched the hard drives of Forrest’s home and office computers. They determined that both hard drives contained the same adult male photographs bearing the “Rude Jam” logo that were found in the photo album.
At trial, the Government presented evidence that an Olympus digital camera found in Forrest’s home had been manufactured in Asia. The Government also introduced evidence that the Polaroid camera had been manufactured in Massachusetts. Additionally, the Government offered the testimony of expert witness *77 Kenneth Lanning, who described the relationships between child molesters and their victims and the victims’ typical responses to such incidents.
Two defense witnesses testified. Steven’s former girlfriend testified that Steven denied that Forrest had ever touched him. A second witness offered her opinion that Steven was a liar.
The jury convicted Forrest of two counts of sexually exploiting a minor for the purpose of producing child pornography in violation of 18 U.S.C. § 2251(a) and two counts of possessing child pornography in violation of 18 U.S.C. § 2252A(a)(5)(B). At sentencing, defense counsel argued that
Blakely v. Washington,
II.
[1] Forrest initially presents an as-applied Commerce Clause challenge to 18 U.S.C. §§ 2251(a) and 2252A(a)(5)(B). He asserts that applying these statutes to him exceeds Congress’s Commerce Clause authority because his private intrastate production and possession of child pornography did not substantially affect interstate commerce. 1
Forrest did not raise this argument in the district court. To be sure, he did argue that the Government had not proven that the materials used to produce the child pornography traveled in interstate commerce. This is not a constitutional attack; it is merely an allegation that the Government did not meet its burden of proving each element of the offenses beyond a reasonable doubt. Because Forrest did not lodge a constitutional challenge in the district court, we review this claim only for plain error.
United States v. Hughes,
Under plain error analysis, an appellant must show that an error occurred, that the error was plain, and that the error affected his substantial rights.
United States v. Olano,
*78
Forrest cannot overcome even the initial hurdle of showing error. The Supreme Court’s recent decision in
Gonzales v. Raich,
— U.S. -,
In
Raich
the Court reaffirmed the longstanding principle that the Commerce Clause empowers Congress to regulate purely local intrastate activities, so long as they are part of an “economic class of activities that have a substantial effect on interstate commerce.”
Raich,
The case at hand is strikingly similar to
Raich.
In both, Congress exercised its Commerce Clause authority to regulate “quintessentially economic” activities,
i.e.,
those involving the “production, distribution, and consumption of commodities.”
Id.
at 2211. True, the regulated commodities differ; in
Raich,
the commodity was marijuana, here it is child pornography. But that distinction is immaterial. In both statutes Congress “directly” regulated economic activity in a “fungible commodity,”
id.
at 2206, by,
inter alia,
prohibiting its possession.
See also United States v. Buculei,
Moreover, in both instances Congress had a rational basis for concluding that prohibition of mere local possession of the commodity was essential to the regulation of “an established, albeit illegal, interstate market.”
Raich,
Furthermore, although Congress need not make findings as to the effect of local
*79
activities on the interstate market before it regulates,
Raich,
In light of these similarities, we can only hold that
Raich
controls the present analysis.
2
As in
Raich,
the general regulatory scheme here governs “quintessentially economic” activities.
Raich,
III.
Forrest also appeals two evidentiary rulings. First, he claims the district court erred by admitting purportedly irrelevant and prejudicial photographs and computer images of adult males. Second, he argues the court erred by‘admitting unreliable and prejudicial expert testimony about the behavior patterns of child sexual predators. We review decisions to admit evidence for abuse of discretion.
Anderson v. Westinghouse Savannah River Co.,
A.
Forrest asserts that the district court erred in admitting several pornographic and nonpornographic photographs of adult males found in his photo album and on his home and office computers. He contends that because these photographs have “the effect of portraying Mr. Forrest as a homosexual, with the prejudice and possible connotation of a child molester as well,” Brief of Appellant at 24, the district court should have excluded them under Federal Rule of Evidence 403.
That rule provides that a district court may exclude otherwise relevant evidence if its probative value is “substantially outweighed by the danger of unfair prejudice.” Fed.R.Evid. 403. A court
*80
does not abuse its discretion by refusing to exclude such evidence, however, unless there is “a genuine risk that the emotions of the jury will be excited to irrational behavior, and that this risk is disproportionate to the probative value of the offered evidence.”
Ham,
The district court did not abuse its discretion here. Even if we accept Forrest’s premise that allegations of homosexuality were prejudicial, that prejudice was not disproportionate to the pictures’ relevance. Forrest’s defense theories made the images of adult males highly relevant. His attorney repeatedly argued that Forrest’s ex-fiancee had “manufactured” the photo album. Alternatively, his counsel suggested several times that Forrest took the photographs of the victim in order to help him prepare a civil law suit against a jail stemming from an illegal strip-search during a field trip.
The images of adult males directly rebutted both theories. The images suggested that Forrest himself manufactured the album, because the same images of adult males in the album, bearing the “Rude Jam” website logo, existed on Forrest’s home and office computers as well. The images’ placement in the album also contradicted the notion that they were taken for innocent, investigatory purposes because Forrest inserted them in the album next to pictures showing the same region of the victim’s anatomy.
Because these adult male images indicated that Forrest had created the album and that he did not possess entirely innocent purposes for so doing, they constituted important relevant evidence. See Fed. R.Evid. 401 (“ ‘Relevant evidence’ means having any tendency to make the existence of any fact that is of consequence ... more probable or less probable than it would be without the evidence.”). Forrest has not established that the images’ purported prejudicial effect was so severe that it substantially outweighed this relevance. 3
B.
Forrest next asserts that the district court erred in admitting the expert testimony of Kenneth Lanning, who testified about the behavioral patterns of child sexual abusers.
A federal district court performs an important “gatekeeping” function in deciding whether to admit expert testimony under Federal Rule of Evidence 702. The court “must ensure that any and all scientific testimony or evidence admitted is not only relevant, but reliable.”
Daubert v. Merrell Dow Pharmaceuticals, Inc.,
Forrest contends that the district court violated Rule 702 in admitting this expert testimony because it was neither reliable nor relevant. He also asserts the court violated Rule 403 because the testimony, which “portray[ed] [Forrest] as a child molester and Steven as his victim,” Brief of Appellant at 33, posed a risk of unfair prejudice that substantially outweighed its probative value.
The admission of this testimony is troubling. Even though Forrest was not on trial for sexual abuse, the court permitted Lanning to describe a general profile of a serial child molester that closely resembled Forrest’s behavior. Lanning testified that child molesters are often authority figures, like police officers; that they often take pictures of the children they assault; that they have their child victims spend the night; that they use pornography to lower their victims’ inhibitions; and that they are often discovered only after someone finds the pictures they have taken. Each of these hypothetical characteristics is present in this case and suggests that Forrest, too, might be a child molester.
We need not resolve whether admission of this expert testimony violated either Rule 403 or Rule 702, however. Even assuming its admission was error, that error was harmless.
See United States v. Jones,
An error in admitting improper expert testimony is harmless if “viewing the record as a whole, it is ‘clear beyond a reasonable doubt that the jury would have returned a verdict of guilty’ absent the testimony.”
Jones,
IV.
Finally, Forrest asserts that the district court erred in sentencing him. He bases his claim on
United States v. Booker,
In
Rast,
we interpreted some anomalous language in § 2251, which then provided that a defendant convicted under that provision shall “be fined under this title or imprisoned not less than 10 years nor more than 20 years,
and
both.” 18 U.S.C.
*82
§ 2251 (2000) (emphasis added).
4
We held that the language “must be the result of a drafting error,” and should be read as “or both,” instead of “and both.”
Rast,
Forrest relies on a portion of the
Rast
opinion that suggests we would have remanded the case to the district court so that it could exercise discretion in deciding whether to impose a fine or a ten-year sentence, but for the fact that the Guidelines required some prison time.
See Rast,
Because Forrest failed to raise this issue in the district court, we consider it only for plain error.
Hughes,
Even if Forrest is correct that, as in
Rast,
the district court in this case felt compelled to give him a prison term because of the mandatory nature of the Guidelines, this does not, in itself, warrant reversal. Although it would be plain error to sentence Forrest to a prison term (as opposed to imposing a fíne) solely because of the mandatory Guidelines regime, a court will not grant relief because of such error unless an appellant demonstrates that such an error affected his substantial rights.
See White,
To make the required showing — that this alleged error affected his substantial rights — Forrest must do more than hypothesize that he might have received a different sentence if the judge knew the Guidelines were merely advisory; he must “demonstrate, based on the record, that the treatment of the Guidelines as mandatory caused the district court to impose a longer sentence than it otherwise would have imposed.”
Id.
at 224. As we held in
Rast,
if the trial court imposes any imprisonment at all under § 2251, it must give a defendant at least ten years,
The record provides no nonspeculative basis for such a conclusion. If anything, it only confirms that the court would have sentenced Forrest to the ten-year statutory minimum jail term regardless of Booker. The district court noted that this was “a very, very serious offense” with many victims, including Steven, Forrest’s family, and the City of Seat Pleasant. Moreover, although the court calculated the guideline range, nowhere did it state that it was the Guidelines, rather than the statutory term (which the court repeatedly mentioned), that mandated the ten-year sentence. Be *83 cause Forrest bears the burden of proof on plain error review, his claim must fail.
V.
For all these reasons, the judgment of the district court is
AFFIRMED.
Notes
. Forrest's assertion derives from his belief that the statutes' jurisdictional limitations'— requiring that the pictures be "produced using materials that have been mailed, shipped, or transported in interstate or foreign commerce by any means, including by computer,” 18 U.S.C.A. § 2251(a) (West 2000);
see also id.
§ 2252A(a)(5)(B) (using substantially identical language)—do not ensure that his activities affect interstate commerce. Although a jurisdictional element may establish that a given statute "is in pursuance of Congress' regulation of interstate commerce,”
United States
v.
Morrison, 529
U.S. 598, 612,
. We note that the Supreme Court itself has suggested that
Raich
bears directly on the question at hand by vacating and remanding in light, of
Raich
two cases sustaining Commerce Clause challenges to these child exploitation statutes.
See United States v. Smith,
. The primary Fourth Circuit precedent on which Forrest
relies
— United
States v.
Hammerely held that the defendant in a racketeering and mail fraud prosecution was unfairly prejudiced by "implications of child molestation, homosexuality, and abuse of women.”
Ham,
. Congress amended this statute in 2003 in the PROTECT Act, Pub.L. 108-21 § 103(b)(1)(A). It now provides that a defendant convicted under section 2251 should receive both a fine and a mandatory minimum jail term. See 18 U.S.C.A. § 2251(e) (West Supp.2005).
