Gonzalo Martinez had no criminal record. His mother says he was a hard-working young man in an import-export business who supported her while helping to put his brother through college. But on Feb. 15 he was shot dead after being pulled over for a traffic violation by Downey, Calif., police. A video, shown last night on "The O'Reilly Factor," appears to show the young man raising his hands on the orders of the police before being shot repeatedly by a police officer wielding an assault rifle. A spokesman for the city of Downey said Wednesday that a second, unreleased video...