The teen gunman who shot himself dead after critically wounding a fellow student at their suburban Denver high school legally purchased the shotgun and ammunition he used in Friday's rampage at Arapahoe High School, according to Sheriff Grayson Robinson.
A vigil being held in Arapahoe for 18-year-old Claire Davis, who was critically injured in the school shooting.
The attack by Karl Pierson, 18, lasted less than a minute and a half, the sheriff said.
More top news
The pilot of the missing MH370 plane plotted a course to the southern Indian ocean on a home flight simulator, investigators have said.
Joe Campbell said he wanted to adopt Kiran Sheikh but was told he couldn't because he wasn't married.
Annual rail passenger figures reveal the most overcrowded service in the spring of 2015, was the 07:00 Brighton to Bedford.