According to the Greenville District School (GCS) website, its security system has had a major upgrade. It now deploys Raptor alert badges and Evolv weapons detection system. The districtwide upgrades cost $1.1 million and focus on faster, proactive safety measures, said the site. The new integrated system with layered security elements replaces a traditional metal detector. The element of unpredictability is a strong deterrent for shooters, said Dr. Burke Royster, Superinten