Michael Main, 55, of Libertyville

A judge on Friday sentenced a Libertyville man to 120 years in prison — the maximum sentence — after he was convicted by a jury of sexually assaulting a child over the span of six years.

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 in July. Main did not testify at his trial.

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.

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Lake County Judge James Booras heard three victim impact statements during a sentencing hearing Friday.

The statements described Main’s acts as “inhumane,” “heinous” and “monstrous.”

The statements went on to detail how Main’s “ugliness” and “sickness” will never be fixed.

Prosecutors said the acts committed by Main were traumatic, unacceptable and unjustifiable.

Prosecutors asked Booras to impose a sentence of 100 years in prison, while Main’s attorney asked for the minimum sentence — 80 years in prison.

Main was convicted of all 17 counts, which led to the mandatory minimum prison sentence of 80 years.

Booras described Main’s acts as “despicable” and noted that the man denied responsibility and downplayed his actions throughout the investigation and sentencing.

Booras then sentenced Main to 120 years in prison. It will be served at 85% in accordance with truth-in-sentencing guidelines.

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The judge revoked Main’s ability to post bond following the verdict. The man had been held on a $1.5 million bond while awaiting his case.