According to the Jefferson County Sheriff's Department, early this morning inmates called out that one of their cellmates was unconscious.
Officers checked on the man and found him unresponsive. They attempted to perform CPR, but by the time EMS personnel arrived it was too late.
An inmate matching Kingery's name and year of birth in the database of the Missouri Department of Corrections is listed as serving a two year sentence for felony possession of 35 grams or fewer of marijuana.
Kingery's cellmates got officers' attention around 3:30 a.m. this morning, but the 24 year old was dead by the time an ambulance arrived.
The Sheriff's Department says the death is under investigation, and an autopsy will determine the cause. We'll update when the results become public.