Background
William Duncan was convicted after a jury trial of six counts of sexual exploitation of a child, one count of child endangerment, and one count of unlawful contact. The evidence showed that Duncan used a parental relationship with his stepdaughter, whom he later adopted, to initiate sexual conversations when she was 12. He sent messages encouraging her to engage in sexual acts with two friends and her stepbrother, bought sexual devices for her, and sent her pornography depicting conduct he wanted the children to imitate. The charged exploitation counts involved four minors.
The district court imposed three consecutive prison terms of seven to ten years for the exploitation convictions and suspended a fourth seven-to-ten-year term in favor of five years of supervised probation. The resulting aggregate sentence was 21 to 30 years, followed by probation. On appeal, Duncan challenged the evidence supporting three exploitation counts. He argued that digital penetration and penetration with a sexual device did not fall within the statutory definition of “explicit sexual conduct,” and that his messages did not entice his stepdaughter to have intercourse with her stepbrother. He also raised a jury-unanimity argument and contended that his aggregate sentence was cruel punishment under Article 1, Section 14 of the Wyoming Constitution.
The Court’s Holding
The Wyoming Supreme Court affirmed every conviction and the sentence. Justice Fenn explained that Wyoming Statute § 6-4-303 defines explicit sexual conduct to include “masturbation” but does not separately define that term. Applying its ordinary dictionary meaning, the Court held that masturbation includes stimulation of another person’s genitals by manual contact, instrumental manipulation, or means other than intercourse. Digital penetration and use of a sexual device therefore fit the statute. Testimony and recovered messages allowed the jury to find that Duncan knowingly enticed his stepdaughter to perform each act on her friend.
The evidence likewise supported the count involving the stepbrother. Although Duncan characterized his messages as an effort to encourage honesty, the Court viewed the full record in the light most favorable to the State. Duncan normalized sexual discussions, encouraged the relationship, and later directed the girl to perform a sexual act in her stepbrother’s bed so he would not refuse her. A rational jury could find that Duncan lured, induced, or aroused her interest in sexual intercourse. The Court also rejected plain-error review of the unanimity claim: the element instructions identified the child and distinct act for each count, told jurors to consider each count separately, and the prosecutor tied separate evidence to each count in closing argument.
Finally, the sentence was not grossly disproportionate under Wyoming’s constitutional ban on cruel or unusual punishment. That state-law inquiry first compares the gravity of the actual conduct with the harshness of the penalty. Duncan exploited a parental position over years, involved four children, encouraged acts that occurred, and sought deletion of incriminating messages. The district court structured one sentence around each affected child, and the aggregate punishment remained below the statutory exposure of 30 to 72 years. Because the threshold showing of gross disproportionality failed, the Court did not compare sentences in other cases or decide whether the punishment shocked the moral sense of the people.
Key Takeaways
- For Wyoming’s sexual-exploitation statute, “masturbation” includes manual stimulation of another person’s genitals and stimulation using a device; the statutory term is not limited to conduct performed on oneself.
- Count-specific element instructions, a direction to consider each count separately, and a closing argument that connects distinct proof to each charge can defeat a plain-error unanimity challenge in a multi-count prosecution.
- Wyoming’s proportionality analysis focuses on the defendant’s actual conduct and the penalty imposed. Only a threshold finding of gross disproportionality triggers comparisons with sentences imposed on similarly situated defendants.
Why It Matters
Duncan gives Wyoming prosecutors and defense counsel a precedential construction of a key term in § 6-4-303. When the legislature includes a sexual act without defining it, the Court will apply its common meaning, and that approach may reach conduct broader than the narrow, colloquial use of the word. Charging documents and jury instructions should still specify the victim and underlying act for every count, particularly when several counts arise from related communications or the same children.
The opinion also confirms that Wyoming’s independent cruel-punishment clause does not make comparative sentencing evidence relevant at the outset. Practitioners must first establish a gross mismatch between the defendant’s real conduct and the aggregate penalty. Where separate children suffered from a sustained course of exploitation and the sentence remains well within statutory limits, consecutive terms may survive that initial proportionality screen.