(Washington Times) He called himself a “psychopath” in his secret diary and vowed revenge for slights dating back to elementary school before the Arapahoe High School shooter killed another student and himself last year, according to a sheriff’s report released Friday.
Law enforcement and school officials said that 18-year-old Karl Pierson, furious over being demoted Sept. 3 as a debate team captain, had become a discipline problem at school and threatened the debate coach, Tracy Murphy, before the deadly Dec. 13 rampage.
Pierson had bragged in his diary that he had lied during the evaluations, saying, “Let the record show I lied through my teeth through the test” at the private center.
