It would seem no one saw it coming -- not his parents, not students at his school. Described by his lawyer as "a typical young kid" who has "never been in trouble," 16-year-old Alex Hribal shocked the people in his life and the nation Wednesday when he allegedly went on a rampage at his high school in Murrysville, Pennsylvania, stabbing or slashing 20 students and a security officer. No one knows yet what might have motivated the attack. But pieces of Hribal's story are starting to come together, so far painting a portrait of a teenage boy no one ever...