A 17-year-old student opened fire at a small-town high school in Iowa on the first day after the winter break, killing a sixth-grader and wounding five others on Thursday in a chaos-filled situation where students barricaded in offices, hid in classrooms and fled. The student was later found dead of what authorities believe was a self-inflicted gunshot wound.A 17-year-old student opened fire at a small-town high school in Iowa on the first day after the winter break, killing a sixth-grader and wounding five others on Thursday in a chaos-filled situation where students barricaded in offices, hid in classrooms and fled. The student was later found dead of what authorities believe was a self-inflicted gunshot wound.