Was the shooter at Arapahoe High School planning Newtown Two? According to numbers scrawled on his arms, Karl Pierson, the gunman who entered Arapahoe High School Friday, had apparently planned to attack five different parts of the Colorado school. The numbers, according to the county sheriff, referred to specific classrooms near the library where authorities believe Pierson was looking for Tracy Murphy, the school’s librarian and and debate coach. Police believe that Pierson, 18, who fatally shot himself after injuring only one other student, acted alone.
