Arapahoe County Sheriff Grayson Robinson speaks during a news conference at the Arapahoe County Sheriff's Office in Centennial, Colo., on Monday, Dec. 30, 2013, where officials discussed the Dec. 13, school shooting at Arapahoe High School.
Photo by Associated Press /Chattanooga Times Free Press .
published Monday, December 30th, 2013
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CENTENNIAL, Colo. — 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.