Police say 14-year-old Shawano County teen is facing possible charges after admitting to leaving a school threat at a city park. Shawano Police say the threat was discovered April 6th at Sturgeon Park. Officers say a message stamped in the snow spelled out “I go shoot up school.” Investigators say it appears to have been a joke and the teen did not intend to harm anyone. Investigators say the case is being referred to the Shawano County District Attorney’s Office.