A 16-year-old boy from Wisconsin who shot his principal to death last year after complaining nothing was being done to stop fellow students from anti-gay bullying him has pleaded guilty to first-degree murder. Eric Hainstock was charged as an adult in the killing of John Klang. When he is sentenced he could face life in prison. Police said that Hainstock armed himself with a handgun and rifle owned by his parents and headed to Weston High School. A janitor and teacher saw Hainstock with the shotgun as he entered the school before classes on Friday morning. Investigators said that Hainstock pointed the gun at the teacher, but the custodian took it away. When Hainstock reached for the handgun the janitor and teacher took cover. Klang then confronted the teenager and tried to talk him into putting down the gun. When Hainstock refused, Klang attempted to wrestle the gun from the youth's hand and the two ended up on the floor. At that point, Hainstock allegedly shot the principal three times. Hainstock told police after he was taken into custody that students regularly bullied him - calling him "fag" and "faggot" and rubbed up against him. Police at the time said that the teenager told them he was so frustrated that Klang and teachers would do nothing to stop the harassment he decided to arm himself. Teachers at the school have disputed Hainstock's claim, and say that he had made threats to his teachers more than once. The day before the shooting Hainstock received a written discipline from Klang for having brought tobacco to school. The teenager was enrolled in a special class at the school for emotionally and behaviourally disturbed students. Teachers say that he excelled in art and had been selected to participate in a districtwide art contest. Ref: 365gay.com (m)