Mr Currie did turn in the paper that AB wrote. He felt bad about it because he thought if he had seen the red flag he may have been able to stop it. He couldn't handle it and took his life.
That's unbelievably sad. Do you know what the paper was? I mean, a fictional story? I'm curious if it was anything like what her friend posted on MySpace, the "Elizabeth 2000-" thing.
With writings IMO there are only real "red flags" in hindsight for the average person. A psychologist might be able to discern between normal teenage angst and a homicidal person, but I don't think it would be that easy for a teacher or friend to do. ABs friends all said she seemed so normal. Also, I'd think teachers would worry about reporting on writings in case they were wrong - parents start tooting the "first amendment" horn. Sighhh.