He was tormented by his classmates until one day he got fed up and decided to take matters into his own hands. He ended up committing mass murder at his school killing 10 people and wounding many more. There were many instances of harassment that Peter experienced in high school that affected him, one bullying event that happened to Peter was when Matt Royston took his pants down in front of the whole school. This was devastating for Peter and the ensuing embarrassment was a lot for him to handle. Another event that happened was an email that Peter sent to Josie confessing that his love for her had leaked all over the school and it was private information that he didn't want anyone else to know about. There were many other events Peter experienced that affected him deeply emotionally and physically. Due to all the bullying and harassment he experienced, he decided as an act of revenge to mass murder some of his own