It is clear that Henderson was significantly influenced by web-based material, especially that found on non-traditional sites that most would find harmful and objectionable.” ...
An online diary apparently kept by the Antioch High School shooter shows he idolized some of the world’s most notorious mass murderers and had a goal of killing “at least 10 people." ...
Pages of writings from the accused shooter at Antioch High School showed a layout of the school, the weapons he wanted to use and his thoughts about why he wanted to commit a shooting.