Gunman, 18, wounds classmate at Arapahoe High School

A woman pauses before a makeshift memorial three days after a shooting attack at Arapahoe High School in Centennial, Colo., Monday, Dec. 16, 2013. During the attack, the shooter shot a classmate in the head at close range with a shotgun, before killing himself. (AP Photo/Brennan Linsley)
A woman pauses before a makeshift memorial three days after a shooting attack at Arapahoe High School in Centennial, Colo., Monday, Dec. 16, 2013. During the attack, the shooter shot a classmate in the head at close range with a shotgun, before killing himself. (AP Photo/Brennan Linsley)