A teen has been sentenced to probation for causing a lock-down at North Butler High School in May of last year, according to KIMT. 19 year old Andrew Corwin of Greene pleaded guilty to one count of threat of terrorism after he told a student at Charles City that he was going to shoot up the school. That threat caused North Butler High School to lockdown. Corwin must spend two years on supervised probation. He must also follow any recommendations for mental health treatment.