he says she was curious about where melissa's body had been found, so he started to drive her out there. ortizd her to get out then shot her as she turned her back. now calderon and his team had to ponder this. remember how investigators trying to solve melissa's murder had reached out to the rest of law enforcement, including the border patrol, looking for melissa's friend, claudine luera? josh mankiewicz: ortiz's job with the border patrol was to work in the bic, the border intelligence center. yeah. josh mankiewicz: you think ortiz heard that you guys were looking for claudine luera and went out and found her and killed her? i-- i swear, i-- you know, the coincidence is just too-- too big, too strong. i think that he heard the call come in. i think that he-- he was on full alert. and thought, i got to cover my tracks. and thought, i've got to get to claudine before they do. craig melvin: ortiz confessed to killing claudine and melissa and guiselda and assaulting erika, and he wasn't done. federico calderon: he tells us, and there was one more you probably don't even know about. craig melvin