The student who shot four students when he opened fire at a Dallas high school this week was in and out of the building in less than two minutes and is believed to have been targeting a specific student, the school district police chief said Thursday.
The 17-year-old suspect was able to enter Wilmer-Hutchins High School, which has metal detectors at its entrance, at 1:01 p.m. Tuesday when another student opened a locked side door, Dallas Independent School District police Chief Albert Martinez said at a news conference.
