Watchhttp://www.businessinsider.com/there-were-police-officers-at-columbine-2012-12
Jefferson County Sheriff’s Deputy Neil] Gardner [the school’s community resource officer], seeing Harris working with his gun, leaned over the top of the car and fired four shots. He was 60 yards from the gunman. Harris spun hard to the right and Gardner momentarily thought he had hit him. Seconds later, Harris began shooting again at the deputy. After the exchange of gunfire, Harris ran back into the building. Gardner was able to get on the police radio and called for assistance from other Sheriff’s units. “Shots in the building. I need someone in the south lot with me.