S. Lyon mom and her disabled teen dead in apparent murder-suicide
By GINA DAMRON FREE PRESS STAFF WRITER
July 22, 2010 23:14 PM
A South Lyon mother, who police have said may have killed her disabled, 13-year-old adopted daughter with prescription pills, died Wednesday, police said today.
South Lyon Chief Lloyd Collins said police were notified last night by the Oakland County Medical Examiner's Office that 52-year-old Donna Carlson – who had been unconscious and on a ventilator since she was found with her daughter, Grace, at their home Saturday – had died.
"We're about to close out our investigation," Collins said today, adding that there's no indication anyone else was involved in the murder-suicide.
Police have said Grace was mentally and physically handicapped and was adopted when she was 2 or 3 months old. Police said the daughter had become assaultive twice in recent months, breaking her mother's nose at least once.
Grace died after being administered prescription drugs, police said. South Lyon Lt. Steve Sharpe said earlier this week that some of the drugs found at the house were of the types used to treat depression and panic attacks, but it was unclear what drugs were used for the overdose.