as part of his story, lisa spoke with the accomplice to the murder, david garza, about who the real killerid took a plea for armed robbery, a lessor offense and was sentenced to 20 years. he said, ruben wasn't there that night. he said, there was someone else with me. >> i don't plan on saying the name of the person that was with me but i can assure you for a fact that it was not ruben cantu. the person that was with me is still out there. >> david garza confirmed to me that there was another boy who was about the same age as ruben who had curly hair, a little lighter hair than ruben's. >> a boy with curly hair had also been mentioned by juan moreno when he spoke with richard reyna. [ speaking in spanish ] >> but if ruben cantu was innocent, why did david garza allow ruben to be executed? >> david told me, we had a code of silence. we didn't talk. we knew that talking to the police would only get us in more trouble. >> me and ruben, we would never snitch each other out for anybody else involved. that was no matter who was involved. >> another friend of david and ruben's did name names. rom