Evansville Police say they are still looking for the people responsible for a bomb threat at Harrison High School. Investigators say they did question someone earlier Tuesday, but no arrests have been made. The school was evacuated that morning in response to the threat. All students stood on the football field, so law enforcement could thoroughly search the building. An EVSC spokesperson says investigators found nothing. She also says a handful of parents showed up at school to take their children home for the day, but that most students returned to class.