The body found in a drainage ditch by a passerby has been identified as 56-year-old Terri Anderson.
The Peoria County coroner says Anderson was strangled to death.
Anderson was last seen on the night of May 18th at her home.
Her ex-husband, Daniel Wilson, says he last saw her when he dropped her off at the house.
On May 19th Wilson was arrested on a variety of charges including forgery, theft and domestic battery.
The charges all involve Anderson but are not directly related to her disappearance.
He has since been released from jail on a notice to appear.
The Peoria Police Department and the Coroner's Office continue to investigate.