Karl Fischer, crime reporter, Bay Area News Group
Mahzarin Banaji, psychology professor at Harvard
Eugene Volokh, law professor, UCLA
In Richmond, Calif. a 15-year-old girl was gang raped in a schoolyard during a homecoming dance. As many as 20 people witnessed the assault. Guests talk about what happened in the case, and examine what causes bystander behavior when they witness acts of violence.