Kendall County Sheriff's Office detectives took two people from Mendota into custody Thursday on charges of involuntary manslaughter.

Investigators believe 29-year-old James Davidson and 32-year-old Courtny Davidson caused the July 2 death of six-year-old Kerrigan Rutherford in Montgomery. Kendall County Coroner Jacquie Purcell ruled the cause of death to be prescription-drug toxicity and the manner to be homicide.

The Davidsons are in the Kendall County Jail, facing one charge each of involuntary manslaughter and two counts each of endangering the life or health of a child.

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