spree inside his pennsylvania high school. police are investigating a phone call that 16-year-old alex hribal made on tuesday night threatening an older classmate. now classmates say that he was constantly bullied. bullied. he has b an it left 21 students and a security guard hurt. being hailed a hero this morning, the assistant principal, sam king, who confronted the teenager, eventually tackling him. mr. king immobilized him, he pinned him down. i jumped on top of him as well and held down his wrests and arms and tried to keep the knife stationary. the suspect s father is speakering out. saying, quote, my prayers go out to everyone injured and i hope they recover as soon as possible. and we will keep you posted. and now a fifth person under