The shooter, Salvador Ramos, a young local, shot his 66-year-old grandma in the face, then escaped in her truck while she called for aid. Shortly before the school tragedy, he outlined his murderous preparations in internet posts. The motive for the shootings has yet to be determined, according to investigators. Officials said the gunman crashed his truck outside the school, exited with a firearm, and approached a back entrance. They said he was "engaged" by a school officer, yet he entered the facility and walked down a hallway to a fourth-grade classroom. He started the fire with an AR-15-style rifle after closing the classroom door. Local policemen and Border Patrol agents eventually pushed the door open and shot him when he fired at them, according to authorities.