A 17-year-old opened fire at a small-town Iowa high school before classes resumed on the first day after the winter break, killing a sixth-grader and wounding five others Thursday as students barricaded in offices, ducked into classrooms and fled in panic. The suspect, a student at the school in Perry, died of what investigators believe is a self-inflicted gunshot wound, an Iowa Division of Criminal Investigation official said. Authorities said one of the five people wounded was an administrator, later identified by his alma mater as Perry High School Principal Dan Marburger. Authorities identified the shooter as Dylan Butler, 17, and provided no information about a possible motive. Two friends and their mother who spoke with The Associated Press said Butler was a quiet person who had been bullied for years. MORE: https://www.wtsp.com/article/news/nation-world/active-shooter-iowa-high-school/507-e42f4b61-24f6-40b2-8fe5-419c034fa2b7 ►Subscribe: https://on.wtsp.com/youtube ►Website: https://www.wtsp.com/ ►Facebook: https://facebook.com/10TampaBay ►Twitter: https://twitter.com/10TampaBay