James Holmes, who killed 12 and injured dozens of others when he went on a shooting rampage at a packed screening of "The Dark Knight Rises" premiere, reportedly sent a notebook packed with details on how he will kill people to a psychiatrist at the University of Colorado. The chilling notebook was sent prior to the deadly attack in Aurora, Colorado, and the mail remained unopened for up to a week before it was finally found and revealed on Monday, three days after the shootings.