Curt A. Kosar, 55, of Capron.

A Capron man, who was in a relationship with a Woodstock woman, has been charged with sexually assaulting the woman’s young child multiple times nearly a decade ago in Woodstock.

Curt A. Kosar, 55, of the 10800 block of Cemetery Road in Capron, was charged with ten counts of predatory criminal sexual assault of a victim under 13, a Class X felony.

The Woodstock Police Department’s Criminal Investigation Division said they were alerted by a detective with the Island Lake Police Department in May 2017 regarding a sexual assault case.

Those allegations had first been reported to the Department of Children and Family Services (DCFS), according to Woodstock Deputy Police Chief Ray Lanz.

The Island Lake police detective advised Woodstock police that the assaults were reported to have occurred in Woodstock over the course of several years in the early-to-mid 2010s.

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A multi-disciplinary team consisting of the Woodstock Child Advocacy Center (CAC), DCFS, the McHenry County State’s Attorney’s Office and a Woodstock police detective worked collaboratively to investigate the case.

The victim, who was under the age of 13 when the assaults occurred, identified Kosar as the suspect.

Lanz said that Kosar was the paramour of the victim’s mother, who died in 2015.

Charges took longer than normal to be filed against Kosar after the victim came forward in 2017 due to “an abundance of caution being taken to protect the health of the victim, who has not had any contact with Kosar since the death of her mother,” Lanz said.

An arrest warrant was issued for Kosar on Wednesday and the Boone County Sheriff’s Office arrested the man without incident at his Capron residence on Saturday.

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A McHenry County judge ordered Kosar held in the McHenry County Jail on a $500,000 bond. He would need to post $50,000 cash in order to be released.

Kosar will appear in court again on Wednesday for a bond hearing.