The gunman -- identified by police as Ethan Blair Miller, 20 -- A search warrant was served on the gunman's vehicle and home, Miller said. Investigators found three Molotov cocktails in his car along with a sawed-off shotgun. Police are working with the ATF to learn if the firearms were legal. In his apartment, authorities found additional ammunition and digital devices that are currently being reviewed. CNN has identified several blog entries appearing to belong to Ethan Miller which were published on the blogging site "Wattpad" detailing a plan and reasons for the shooting. June 29 and signed with the...