I worked with two people who were students at Columbine. Both in their 30s, both of whose lives were completely shaped by that incident. One was struggling with anger management issues, because she'd used "I was at Columbine" her whole life as a get-out-of-jail-free card to act out with no consequences. It wasn't until she was in her late 20s that she realized if she kept doing that, she'd never get past being that terrified child, and that even if no one else would hold her accountable, she had to hold herself accountable. The other had gone to many years of therapy, and now preaches on the power of forgiveness. Because he saw firsthand in his own life how things turned around only after he was able to forgive the shooters. And those are two people who are considered "success stories" for being able to move past the tragedy. It took them well over a decade to be able to do that.