Patricio J. Salas, 32, of Algonquin.

Authorities say a man held a woman against her will at knifepoint for hours at an Algonquin-area home where he allegedly attacked her and sexually assaulted her before she escaped.

The Kane County Sheriff’s Office responded around 6:25 a.m. Saturday to the 400 block of Natoma Trail in unincorporated Algonquin for a report of a domestic battery.

The sheriff’s office said it was reported the incident involved Patricio J. Salas, 32, of Algonquin, and his girlfriend.

Deputies learned the woman was held at knifepoint in a bedroom of Salas’ residence unable to leave.

She attempted to call 911 for help several times but Salas allegedly took the phone from her.

Salas also allegedly sexually assaulted the woman during the ordeal.

The victim was eventually able to text “help” to her brother-in-law, who was able to arrive at the residence, sheriff’s officials said.

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An altercation ensued between the brother-in-law and the boyfriend, at which point the woman was able to escape the confines of the bedroom.

Law enforcement arrived and found that Salas had fled the scene, sheriff’s officials said.

Salas was located down the roadway after he crashed his vehicle and suffered minor injuries.

The Algonquin Police Department and Algonquin-Lake in the Hills Fire Protection District responded to assist the sheriff’s office.

The woman suffered visible injuries and was transported for treatment.

Salas was taken into custody by the Kane County Sheriff’s Office following treatment for injuries from the crash.

Investigators conducted interviews with Salas, the victim and witnesses.

The Kane County State’s Attorney’s Office approved charges of aggravated criminal sexual assault while armed, aggravated criminal sexual assault threatening the life of the victim, aggravated domestic battery by strangulation, two counts of domestic battery, interfering with the reporting of domestic violence and aggravated unlawful restraint.

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