Michael Main, 55, of Libertyville

A Libertyville man faces at least 80 years in prison after a jury convicted him of sexually assaulting a child over the span of six years, court records show.

Michael Main, 55, of Libertyville, was convicted on six counts of predatory criminal sexual assault, a Class X felony, and 11 counts of criminal sexual assault, a Class 1 felony.

The jury reached the guilty verdict after an hour of deliberation Thursday.

Main was first charged in August 2016 after the victim made a report to the Libertyville Police Department.

The victim reported that they had been sexually assaulted by Main over the course of six years, prosecutors said.

Court records show the victim was under 13 when the assaults began.

The Libertyville Police Department conducted an investigation and arrested Main shortly after.

Main’s trial began Tuesday and lasted three days.

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The jury heard from six state witnesses, including forensic and medical experts.

The experts testified how the victim’s account of the assault aligned with the physical evidence collected.

Main chose not to testify and the defense called no witnesses to the stand.

“The survivor took that courageous step to come forward, and their faith in the system paid off yesterday. We are pleased that the jury saw the truth of this case, and I want to commend the Libertyville Police Department and the trial team for their outstanding work,” Lake County State’s Attorney Eric Rinehart said.

“Our amazing victim support professionals have been with the survivor every step of the way and will continue to assist them,” Rinehart said.

Because Main was convicted of all 17 counts, he faces a mandatory minimum prison sentence of 80 years. The sentence will be served at 85%.

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Lake County Judge James Booras revoked Main’s ability to post a cash bond following the verdict.

A pre-sentence investigation will be conducted and a motions hearing will be held on September 20.