Prosecutors revealed new details about a deadly west suburban attack and police-involved shooting in court on Friday.
A man allegedly suffocated a teenage girl and stabbed her mother in unincorporated Lyons Township on Monday night, prosecutors said.
It happened at an apartment in the 6400-block of Joliet Road. That's near the border of La Grange and Countryside.
The Cook County Sheriff's Office said one of their officers responded to a domestic violence call there around 5:30 p.m. Monday.
The officer found a man holding one of the victims, who was bleeding, at knifepoint, the sheriff's office said. A second victim was lying motionless and bleeding on the ground.
That's when the suspect began stabbing the victim again, and the officer fired shots, striking him, the sheriff's office said.
Both victims and the suspect were taken to local hospitals in unknown conditions. The teenage girl, who had been suffocated, was pronounced dead, prosecutors said.
Sheriff's police detectives are conducting a criminal investigation, and the Illinois State Police Public Integrity Task Force is investigating the officer-involved shooting.
The video in the player above is from a previous report.