Texas cops have revealed that there was no armed guard on campus when the gunman arrived on Tuesday which allowed him to walk 'unobstructed' through an unlocked door and into the building where he slaughtered 21 people. At a press conference on Thursday afternoon, Victor Escalon, the Regional Director for the Department of Public Safety South Texas, said Salvador Ramos walked through an unlocked door 'unobstructed' and that there was no guard 'readily available'. It contradicts earlier reports that he fired at a school resource officer. Ramos entered the school at 11.40am, 12 minutes after crashing his truck outside the...