Candis King was pronounced dead Tuesday night, just after 11:00 p.m.
King was serving a seven year sentence from St. Louis County for second degree assault, armed criminal action and from Audrain County for violence to a Department of Corrections Employee or inmate.
King was first admitted into the Missouri Department of Corrections in 2009.
An autopsy will be performed to determine the cause of death. Foul play is not suspected.