Wisconsin ? A student charged in the shooting death of his school principal was a normal teenager but often bragged about getting into trouble, a neighbor said Saturday as the tiny farm town of Cazenovia struggled to come to terms with the attack.

Eric Hainstock, 15, told police he gunned down Weston Schools Principal John Klang before classes began Friday because he was upset about a reprimand Klang had given him, according to a criminal complaint charging him with first-degree intentional homicide. The teen also was upset because he thought teachers didn’t intervene to stop students who harassed him, the complaint said.

Klang was shot just inside that entrance, a day after the principal gave Hainstock a disciplinary warning for having tobacco, according to the complaint.