Barton County Prosecutor Steven Kaderly said at a news conference Friday that Attorney General Chris Koster's office will assist in prosecuting 34-year-old Bobby D. Bourne Jr., of Lockwood. Bourne is being held on $1 million bond on a charge of kidnapping. It's unclear if he has a lawyer.
Adriaunna Horton was reported missing Monday, shortly after she was last seen getting into a vehicle in Golden City, where she lived with her father. Bourne was arrested about two hours later.
Kaderly says he'll file more charges against Bourne, but it's unclear when.
Authorities haven't said how the child died, but said an autopsy was performed Thursday in Springfield.