(YAHOO) -A terminally ill Illinois mother who killed her severely disabled daughter in 2015 committed suicide two days before she was due to return to prison.
Officials confirmed Bonnie Liltz, 57, who was set to return to prison Monday for the crime, was found inside her Schaumburg apartment Saturday.
Liltz was sentenced last year after pleading guilty to involuntary manslaughter of her daughter, Courtney, who was 28 at the time the mother administered her a lethal dose of prescription medication.
Previously, she revealed a motive over concern about who would care for Courtney after she passed away from her own health complications.
Liltz told her mother earlier Saturday she had plans to meet with a friend for a lunch and movie outing, according to ABC 7 Chicago.
But friends and family later discovered the suicide note which read Liltz loved them ‘very much and that she’s sorry, that she just could not go back to that place,’ her sister, Sue Liltz, revealed in a statement to the news station.
It seems a depressed Liltz overdosed on medication which she previously gave her daughter and also took herself at the time of Courtney’s tragic death.