The articles below give some updated information - his name, age, etc. He was a 14-year-old 8th-grade student at the school. Witnesses say he tried to break through a window.
I don't know how much damage a pellet gun can do, but he had some plans for it:
Wisconsin School Gunman Damian Haglund’s Manifesto Says He Related to Sandy Hook Shooter
Wisconsin Teen Damian Haglund Named as Mount Horeb ‘Active Shooter’
Great finds. Thanks! Our locals are not really doing justice to this story. It’s no different than any other situation we’ve seen, really. :(