he died, a victim of ricin and the cold war. gary tuchman, cnn, atlanta. >> such an incredible story. you can follow me on twitter tonight. we'll try to tweet throughout this hour. up next, a key piece of evidence presented in court. videotape that could prove the innocence of an arizona mother who has been jailed in mexico accused of smuggling drugs. rafael romo was in court and will tell us what he saw on that video, why it may clear her. we'll also have more of his exclusive jailhouse video with her. >> i'm not a criminal. i'm just scared. people are assuming the worst. it's not right. i need to be back with my family. i need to be out of here. i am an american success story. i'm a teacher. i'm a firefighter.