Yorkville Man Sentenced to 12 Years for Sexually Assaulting Girl

Chaske Roskopf admitted to some of the assaults, but only when he was a minor, the state's attorney said.

Published on Feb. 25, 2026

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A 24-year-old Yorkville man was sentenced to 12 years in prison after being found guilty of sexually assaulting a girl starting when she was 9 years old. Chaske Roskopf was convicted of two counts of aggravated criminal sexual assault and must serve 85% of his sentence before being eligible for release. He will also have to register as a child sex offender for life.

Why it matters

This case highlights the ongoing issue of child sexual abuse and the importance of thorough investigations and strong sentences to protect vulnerable young victims. It also raises questions about the role of admissions and the distinction between crimes committed as a minor versus an adult.

The details

Roskopf was found guilty after a three-day trial in October 2026. The assaults occurred at his home on Countryview Drive in Yorkville and continued until the victim was almost 13 years old. Roskopf admitted to some of the sexual assaults, but only those that occurred when he was a minor himself.

  • Charges were filed against Roskopf in 2022 after a Kendall County Sheriff's Office investigation.
  • Roskopf was convicted by a jury in October 2026 after a three-day trial.
  • Roskopf was sentenced to 12 years in prison in February 2026.

The players

Chaske Roskopf

A 24-year-old Yorkville man who was convicted of sexually assaulting a girl starting when she was 9 years old.

Eric Weis

The Kendall County State's Attorney who prosecuted the case against Roskopf.

Judge Gleason

The judge who sentenced Roskopf to 12 years in prison.

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What they’re saying

“He further admitted that [the assault] occurred in his home.”

— Eric Weis, Kendall County State's Attorney (Patch.com)

“Roskopf admitted to some of the sexual assaults, but "only to some acts and only when he himself was a minor.”

— Eric Weis, Kendall County State's Attorney (Patch.com)

What’s next

Roskopf is required to serve 85 percent of his 12-year sentence before being eligible for mandatory supervised release. He must also register for life as a child sexual offender.

The takeaway

This case highlights the ongoing challenge of addressing child sexual abuse and the need for thorough investigations, strong sentences, and lifelong registration requirements to protect vulnerable young victims and hold offenders accountable.