LITTLETON, Colo. - Arapahoe High School may be turned over to Littleton School District officials Sunday night.
Investigators have completed their work at the high school, Arapahoe County Sheriff Grayson Robinson told 7NEWS Reporter Russell Haythorn Sunday.
No classes are being held at Arapahoe High Monday. It is not clear when the school will reopen. The rest of the district is on the regular schedule.
Karl Halverson Pierson, 18, shot a fellow student inside the school, investigators said Friday night.
17-year-old Claire Davis was airlifted to Littleton Hospital.
She is in "very critical condition," Arapahoe County Sheriff Grayson Robinson said Sunday.
Pierson went into the school armed with a shotgun looking for the school's librarian, Tracy Murphy -- who was head of the school's speech and debate team and who had recently kicked Pierson off the team, sources told the CALL7 Investigators.
Pierson was found dead from an apparent self-inflicted gunshot wound 5 minutes after the deputy assigned as a school resource officer made an initial radio call about the "active shooter" situation inside the school, Robinson said.