This school is about 10 miles from Columbine and also near the Aurora theater shooting.
Karl Pierson, an 18-year-old student killed himself inside Arapahoe High School after shooting and injuring another student early Friday afternoon. Pierson shot and gravely wounded a 15-year-old female student after storming into the school at 12:33 p.m.on Friday afternoon. The female underwent surgery and was in critical condition Friday evening. Arapahoe County Sheriff Grayson Robinson said Pierson was originally targeting a teacher. He said Pierson, who acted alone, entered the school with a shotgun and identified the teacher he was targeting.
A janitor first spotted the gunman and alerted authorities. The man, who said he wanted to be identified only as Fabian, said the gunman was running side to side, kind of military style."
"I looked to see if there was a gun," Fabian told KUSA. "It was a shotgun."
"When he went into the library, he said, 'Where is Murphy?'" Fabian said. Robinson confirmed that the gunman was armed with a shotgun.
Students described a scene of terror when the shooting started."I heard three shots, and then the school went into lockdown," Camden Flinders, 14, a freshman, told NBC News. "I saw the blood in the study center and in the gym. We could see blood on the floor. ..."We went on lockdown for about 20 to 30 minutes. There was big line of police and blood splatters by the gym and the study center," he said.
A law enforcement official said Arapahoe had just recently practiced an active-shooter drill.