Parents Make Child's Death Their Cause08:22

Trayvon Martin's parents have been going public to bring attention to their son's death over a month ago. Melissa Block talks with two mothers, Annette Nance-Holt and Candace Lightner, who also spoke out publicly after the death of their children. Nance-Holt helped start a group called Purpose Over Pain and Lightner founded Mothers Against Drunk Driving.