ST. CHARLES – A St. Charles man who pleaded guilty to sexually assaulting a developmentally disabled woman last year faces four to 15 years in prison.

Gary R. Kluber, 67, of the 100 block of South 10th Avenue in St. Charles, pleaded guilty Friday to one count of criminal sexual assault, a Class 1 felony, according to a news release.

Circuit Judge John A. Barsanti accepted the plea and set Kluber's sentencing date for 9 a.m. on April 3.

The victim had been visiting her boyfriend at his home on June 2, 2012, and Kluber was also present. When the victim's boyfriend went upstairs, Kluber forced sexual contact on the victim despite repeated requests from the victim to stop. The victim then disclosed the assault to her family, and Kluber admitted to the assault when he was interviewed by St. Charles police, according to the release.

The victim is 35 years old, but due to her developmental disabilities, she functions as a pre-adolescent.

Kluber had been held in the Kane county Jail since his arrest, and his bond of $250,000 was revoked upon conviction.

Kane County State's Attorney Pam Monaco prosecuted the case.