Bryan Kohberger lost over 100 pounds to escape bullying, and then became a killer. Research reveals the dangerous psychology ...

* Caliyah James, an 11-year-old African American student at Frank E. Woodruff Elementary School in Bellflower, California, was targeted in a racist bullying incident.

Oct. 13, 2010 -- Kids become bullies for myriad reasons, but it seems as if a single force could have stopped them: zero tolerance for bullying in school.