Arapahoe High School shooting

Updated 8:15 PM ET, Sat December 21, 2013
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Claire Davis, a 17-year-old senior at Arapahoe High School, died Saturday, December 21, eight days after she was shot by a student with a shotgun at the school in Centennial, Colorado. "Despite the best efforts of our physicians and nursing staff, and Claire's fighting spirit, her injuries were too severe," Littleton Adventist Hospital said in a statement. Arapahoe County Sheriff
Arapahoe County Sheriff Grayson Robinson holds a picture of Davis at a press conference on Saturday, December 14, after identifying her as the victim of the shooting at Arapahoe High School the day before. Ed Andrieski/AP
Robinson identified the shooter as 18-year-old Karl Halverson Pierson, who killed himself after opening fire. Pierson had asked about a specific teacher when he entered the school armed with a shotgun on December 13.
Students are escorted out of Arapahoe High School in Centennial, Colorado, on December 13. Craig F. Walker / The Denver Pos/Getty images
Students wait outside Arapahoe High school after being evacuated on December 13. Craig F. Walker / The Denver Post/Getty images
Officers escort students out of Arapahoe High School. Craig F. Walker/The Denver Post/Getty Images
Susie Ohle hugs Rob Escue as he came out of the school on Friday afternoon. Karl Gehring/The Denver Post/Getty Images
Ruben Allen hugs his son Alex Allen, 17, after being evacuated from the school Chris Schneider/Getty Images
Students and parents walk away from the school. RJ Sangosti/The Denver Post/Getty Images
Law enforcement personnel arrive at the high school in a military-style vehicle. RJ Sangosti/The Denver Post/Getty Images
SaSha Meiler is overcome with emotion after hearing the voice of her younger sister, a freshman. RJ Sangosti/The Denver Post/Getty Images
Parents Cathy Thorson, left, and Heather Moran, facing the camera, embrace while they wait for news on their children. Karl Gehring/The Denver Post/Getty Images
Students walk away from the school in single file with their hands up. kdvr/twitter
Students from Arapahoe High School gather at the school's track. kdvr/twitter
People gather outside the school. KDVR/Twitter
Parents wait for word about their children after a gunman opened fire at the school. John Leyba/The Denver Post/Getty Images
Members of law enforcement are seen outside the school. kdvr/twitter
Law enforcement personnel gather near the high school. kdvr/twitter