He plotted a mass murder at a North Sound High school. On Tuesday, Joshua Alexander O'Connor apologized in court, saying he is grateful his grandmother "intervened when she did."

O'Connor pleaded guilty last December and was supposed to be sentenced for his crimes Tuesday. But the judge postponed sentencing after 4 1/2 hours of testimony detailing O'Connor's childhood.

By almost every standard, O'Connor had a horrific childhood, living with an unstable mother, finally rescued by his caring grandparents. But even he admitted in court, that was not enough to save him.

Read more: KIRO (Seattle, Washington)