Dozens of Wilmer-Hutchins High School students walked out of class Wednesday morning in protest, a Dallas ISD spokesperson said, marking their first day back to the school since a classmate brought a gun to campus and opened fire.

The student accused of injuring four in a shooting at a Dallas high school was let into the building through an unsecured door and then walked down a hallway toward a group of students, opening fire on them before appearing to take a point-blank shot at one.