13/12/20132013Centennial, Colorado, United StatesColorado2018-year-old Karl Pierson shot 17-year-old student Claire Davis in the head, fatally injuring her, in a hallway in Arapahoe High School. Pierson then committed suicide by shooting himself. Pierson was armed with a shotgun, three Molotov cocktails, and a machete. He was looking for a faculty member who had disciplined him, and intended to shoot him. Claire Davis died from her injuries on December 21, 2013."Shooter still believed to be inside Colorado school, sheriff says". CNN. December 13, 2013. Retrieved December 13, 2013. |Nicholson, Kieran; Parker, Ryan; Steffen, Jordan; Lee, Kurtis; Gurman, Sadie (December 13, 2013). "Shooting at Arapahoe High School, 1 reported in critical condition, suspected gunman dead". Denver Post. Retrieved December 13, 2013. |"Arapahoe High School shooting victim dies". CNN. December 22, 2013. Retrieved December 25, 2013.