"This research lines up with many anecdotal stories we heard after the tragedy from kids who suffered physical and psychological abuse at the hands of their classmates at the school. One story in particular stands out. When Tom went to the sheriff's department in the fall of 1999 to retrieve Dylan's car from the impound lot, a county employee offered his condolences and told him how his own son's hair had been set on fire by some other students while he was attending Columbine High School. The boy, who sustained fairly serious burns to his scalp, refused to allow his father to go to the administration because he was afraid it would make the situation worse. Shaking with anger as he spoke, though the incident was no longer recent, the outraged dad told Tom he had wanted to take the school apart "brick by brick.""
January 1, 1970
https://en.wikiquote.org/wiki/Bullying