( CNN ) -- The shooting at Arapahoe High School in Centennial began just after 12:30 p.m. Janitor Fabian Llerenas saw a student armed with a shotgun , running military-style . `` We were shaking . We were crying , '' 9th-grader Whitney Riley said . A teacher and two students were shot before the gunman was taken into custody.
The shooting at Arapahoe High School in Centennial began just after 12:30 p.m. Janitor Fabian Llerenas saw a student armed with a shotgun , running military-style . `` We were shaking . We were crying , '' 9th-grader Whitney Riley said . A teacher and two students were shot before the gunman was taken into custody.