COMING UP: It's Thursday Night Football Blitz presented by Connect For Health Colorado, with Demaryius Thomas & Rahim Moore. Watch it on CBSDenver.com at 6 p.m. or head to the new ViewHouse Centennial to see it live!

Arapahoe High School Shooter Entered Through Open Door

The teenager who fatally shot a fellow student at his suburban Denver high school this month entered through a door that was supposed to be locked but had been propped open, the sheriff said Monday.