(SCHAUMBURG) A northwest suburban woman has been charged with murder for forcing her daughter to take a fatal overdose of various drugs last month at their Schaumburg home, according to police.

Bonnie R. Liltz, 55, is charged with first-degree murder, according to a statement from Schaumburg police.

Authorities were called about a medical emergency about 3:15 p.m. May 27 at Liltz’s home in the 1100 block of South Springinsguth Road, police said. Paramedics and officers were met by someone who had come to the house to check on the residents after they couldn’t be reached by phone.

Bonnie Liltz and her daughter, 28-year-old Courtney Liltz, were found unconscious in their beds, and officers found evidence of apparent overdoses of various medications, police said. Both women were taken to Alexian Brothers Medical Center in Elk Grove Village.

Further investigation indicated that Bonnie Liltz tried to end her daughter’s life and then commit suicide, according to police.

Courtney Liltz never regained consciousness, police said. She was pronounced brain-dead at Alexian Brothers Medical Center at 6:43 p.m. June 1, according to the Cook County medical examiner’s office. She was removed from life support early Friday morning.

Bonnie Liltz was charged after being released from medical treatment on Thursday, police said. She was expected to appear in bond court in Rolling Meadows on Friday afternoon.