In writings sent to family members minutes before the attack, the 31-year-old described himself as 'Friendly Federal Assassin' and railed against recent actions taken by the U.S. government under Trump.
Cole Tomas Allen, a 31-year-old CalTech graduate and high school tutor from Torrance, is believed to have taken a train first to Chicago and then on to D.C. before checking into the Washington Hilton with two guns he had previously purchased.