In light of the recent beating death of gay student Matthew Shepard, a discussion of anti-gay violence with documentary film maker Arthur Dong. In his 1997 film "Licensed to Kill," Dong interviews convicted murderers of gay men and asks them "Why did you do it?" Twenty years ago, Dong himself was the victim of a gay bashing. Dong is a Peabody Award winner and Oscar and Emmy nominated independent filmmaker. His other films include "Coming Out Under Fire," and "Forbidden City, U.S.A."