In a training exercise at the school, officers were told to respond to the school and look for a shooter who shot a student and is roaming the campus. Traveling in groups, it's their mission to find that shooter and end everything safely.
"We try to make it realistic. We want the officers -- from the city, county, and state -- to do everything they would in an active shooter setting," said Captain Keith Eremea, who works with Arkansas State Police.
Eremea said the Greenbrier High campus offers good training because it has multiple buildings. That means officers have to check every room.
"Everything happened so quick and going so fast and I'm just standing there shaking. I didn't realize I was shaking until they started patting us down and everything," said Matthew Spainhour, who participated in the drill.
School leaders believe the campuses are safe but know there are always areas to improve.
"It will help us as we re-evaluate our crisis plans and kind of give us another perspective as we see what law enforcement does when they come into a school," Superintendent Scott Spainhour said.