A Linn county man has admitted he had an illegal sexual relationship with a young boy. 53-year-old Gary D. Foster entered a guilty plea in Boone County yesterday to charges of child sexual exploitation and statutory sodomy. He was arrested after an investigation by the Kirksville Regional Cyber Crime Task Force and the Linn County Sheriff’s Department. Foster was arrested at his job in Milan in June. His sentencing is scheduled for December 23rd.