The Wisconsin 19-year-old who is charged with making threats against Murray High School appeared in court on Tuesday. The Calloway Circuit Court Clerk says Kya Nelson appeared virtually, where he waived arraignment and entered a not guilty plea. Nelson was arrested January 29 by the Racine County Sheriff’s Department after the execution of a search warrant at his home. The investigation began on four days earlier, after police got a call about shots fired at Murray High School. the school was locked down for about an hour before students and faculty could resume their schedule. A bomb threat was received the next morning, leading to another lockdown and eventual dismissal of students for the rest of that day and the week. Nelson waived extradition in February and was transferred to Calloway County Jail. He faces one count of first-degree terroristic threatening and two counts of second-degree terroristic threatening.