Mateo Monfiel-Cervantes, 31, of Crystal Lake.

A Crystal Lake man has been sentenced to six years in prison after he pleaded guilty to a reduced charge of attempted sexual assault of a victim in Crystal Lake, court records show.

Mateo Monfiel-Cervantes, 31, of Crystal Lake, was charged in October 2019 with two counts of criminal sexual assault, a Class 1 felony.

A grand jury indictment said Monfiel-Cervantes committed the assault on June 7, 2019.

Monfiel-Cervantes committed a sex act on a woman, who was unable to understand the nature of the act or was unable to give consent, the indictment said.

The case was investigated by detectives with the Crystal Lake Police Department.

Monfiel-Cervantes was arrested and has been held in the McHenry County Jail since September 2021.

Monfiel-Cervantes entered into a negotiated plea deal with the McHenry County State’s Attorney’s Office on Monday.

He pleaded guilty to an amended charge of criminal sexual assault as a Class 2 felony in exchange for his Class 1 felonies being dismissed.

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McHenry County Judge Tiffany Davis approved the plea deal and sentenced the man to six years in the Illinois Department of Corrections.

The sentence will be served at 50% in accordance with truth-in-sentencing guidelines.

Monfiel-Cervantes will receive 483 days of credit for time served awaiting his case in the jail.

He could receive an additional 35 days of credit if he completes sex offender treatment.

Monfiel-Cervantes will have to register as a sex offender for life upon release from the Illinois Department of Corrections.

Monfiel-Cervantes remains held in the jail awaiting transport to a state prison.