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The autopsy and toxicology report for 6-year-old Kerrigan Rutherford reveals that the Boulder Hill girl died on an overdose of the drug Olanzapine. The toxicology report says the drug is used to treat schizophrenia and bipolar mania.

The report found that Rutherford had a concentration of 720 nano grams per milliliter (ng/mL) in her blood. It says that plasma concentrations required for treatment of psychotic episodes require 20 to 80 ng/mL. The drug is typically given in doses of five to ten milligrams a day. Side effects can include heart complications among other things. The autopsy report noted Rutherford had an enlarged heart.

The body had almost no signs of injury except for a small bruise on the right leg.

Rutherford's mother and stepfather were arrested last week and charged with involuntary manslaughter along with endangering the life and health of a child. James and Courtny Davidson are being held in the Kendall County Jail on $250,000 bond.

Kerrigan Rutherford was found dead on July 2 in a home in Boulder Hill. An obituary noted that she was a student at Boulder Hill Elementary School in the Oswego 308 District.