A man in the country illegally has been charged in the death of a missing University of Iowa college student .Agent Richard Rahn of the Iowa Department of Criminal investigation says the suspect, 24-year-old Christian Rivera is being held in the Poweshiek County Jail:Audio Playerhttp://kscj.com/wp-content/uploads/2018/08/TIBBETTSDEAD.mp300:0000:0000:00Use Up/Down Arrow keys to increase or decrease volume.OC….first degree. :1220-year-old Mollie Tibbetts was last seen July 18, jogging in her hometown of Brooklyn in central Iowa.Agent Rahn says when authorities interviewed Rivera, he admitted to having an encounter with her as she was running:Audio Playerhttp://kscj.com/wp-content/uploads/2018/08/TIBBETTSDEAD4.mp300:0000:0000:00Use Up/Down Arrow keys to increase or decrease volume.OC……….then placed Mollie. :25That interview Monday led to the discovery of her body:Audio Playerhttp://kscj.com/wp-content/uploads/2018/08/TIBBETTSDEAD5.mp300:0000:0000:00Use Up/Down Arrow keys to increase or decrease volume.OC……………to her location. ;04A body authorities believe to be Tibbetts was found hidden under corn stalks in a farm field Tuesday morning about eight miles southeast of Brooklyn.Rahn says a tip from the public led investigators to suspect Rivera:Audio Playerhttp://kscj.com/wp-content/uploads/2018/08/TIBBETTSDEAD3.mp300:0000:0000:00Use Up/Down Arrow keys to increase or decrease volume.OC……….seen Mollie running. :29Agent Rahn says Rivera has lived in the area for some time:Audio Playerhttp://kscj.com/wp-content/uploads/2018/08/TIBBETTSDEAD2.mp300:0000:0000:00Use Up/Down Arrow keys to increase or decrease volume.OC…….seven years. :11An autopsy on the body will take place Wednesday at the state medical examiner’s office in Ankeny.