It took about six months for the sheriff's department to begin sharing some of the evidence explaining what happened that day. For those six months, Dylan's friends and family were in denial. We didn't know that he and Eric had assembled an arsenal of explosives and guns. We believed his participation in the massacre was accidental or that he had been coerced. We believed that he did not intend to hurt anyone. One friend was sure that Dylan had been tricked at the last minute into using live ammunition. None of us could accept that he was capable of doing what he did.

These thoughts may seem foolish in light of what we now know, but they reflect what we believed to be true about Dylan. Yes, he had filled notebook pages with his private thoughts and feelings, repeatedly expressing profound alienation. But we'd never seen those notebooks. And yes, he'd written a school paper about a man in a black trenchcoat who brutally murders nine students. But we'd never seen that paper. (Although it had alarmed his English teacher enough to bring it to our attention, when we asked to see the paper at a parent-teacher conference, she didn't have it with her. Nor did she describe the contents beyond calling them "disturbing." At the conference—where we discussed many things, including books in the curriculum, Gen X versus Gen Y learners, and the '60s folk song "Four Strong Winds"—we agreed that she would show the paper to Dylan's guidance counselor; if he thought it was a problem, one of them would contact me. I never heard from them.) We didn't see the paper, or Dylan's other writings, until the police showed them to us six months after the tragedy.

In the weeks and months that followed the killings, I was nearly insane with sorrow for the suffering my son had caused, and with grief for the child I had lost. Much of the time, I felt that I could not breathe, and I often wished that I would die. I got lost while driving. When I returned to work part-time in late May, I'd sit through meetings without the slightest idea of what was being said. Entire conversations slipped from memory. I cried at inappropriate times, embarrassing those around me. Once, I saw a dead pigeon in a parking lot and nearly became hysterical. I mistrusted everything—especially my own judgment.

Seeing pictures of the devastation and the weeping survivors was more than I could bear. I avoided all news coverage in order to function. I was obsessed with thoughts of the innocent children and the teacher who suffered because of Dylan's cruelty. I grieved for the other families, even though we had never met. Some had lost loved ones, while others were coping with severe, debilitating injuries and psychological trauma. It was impossible to believe that someone I had raised could cause so much suffering. The discovery that it could have been worse—that if their plan had worked, Dylan and Eric would have blown up the whole school—only increased the agony.