The injured student, a 15-year-old girl, was critically wounded and was in surgery after the gunman shot her at Arapahoe High School in Centennial. Arapahoe County Sheriff Grayson Robinson said initial reports that the student confronted the gunman turned out not to be true.

A second student initially believed to have been wounded turned out only to have been splattered with some of the girl's blood, Robinson said at a news briefing late Friday.