St. Louis County, MO  (KTRS)  The investigation continues in the death of a baby boy in south county.

Investigators say the autopsy on 1-year-old Tate Mitchell was completed Tuesday. However, results of the autopsy haven’t been released.

EMS was called to Casa Dia Montessori School on Monday after the child became unresponsive.Life saving efforts were unsuccessful.

Investigators suspect the child was left in a car for a extended period of time.