The Colorado school gunman responsible for critically injuring a 15-year-old girl before he shot and killed himself, had his home and car searched by authorities Saturday. Officials have named the gunman as 18-year-old Karl Pierson.
Tracy Murphy, both a librarian and debate team coach, is believed to have been the target of the gunman in the shooting.
According to KUSA-TV in Denver, Murphy implemented “active-shooter protocols” after he learned that Pierson was armed with a shotgun and asking for him on Friday. Murphy then left the scene.
Arapahoe County Sheriff Grayson Robinson praised a school resource officer who responded right after hearing the first shots.
“He found (Pierson’s) body within five minutes,” Robinson told The Denver Post. “Not only did he know what he was doing but he was very courageous.”
When questioned Friday night, Robinson would not give any further comment on what could be a possible motive for the shootings other than Pierson had had a “confrontation or disagreement” with the teach and was found dead of a self-inflected gunshot wound.
The 15-year-old girl, who also suffered a non-fatal gunshot wound, remains in critical condition as of Saturday. Two other students suffered minor injuries.
The shooting occurred on the eve of the first anniversary of the Newtown school massacre, a traumatic event in which 20 students and 6 staff was killed. Terrified students and staff at Centennial’s Arapahoe High School scurried at about 12:30 pm. When the shooting took place. Police and first responders hurriedly mobilized to surround the school of 2,200 students.
The terror began when the armed Pierson entered the west side of the school from a student parking lot. He told some of his classmates that he was interested in finding one specific teacher.
Students reported hearing several gunshots in a hallway near the school library. Many locked themselves in classrooms until first responders came.