this was no big thing. >> to keep it simple, they decided, casual, slightly flirtatious, very routine. and so on a bright saturday morning in march, harris and comstock hit the road, driving to the desert outside los angeles where gutierrez now lived. >> we had one chance to get this done, because once he finds out that he's being focused on in the murder investigation, he's not going to talk to law enforcement. he's going to get an attorney, and then we've lost our only chance. >> harris and her partner, calm as they can muster, walk up the path to art gutierrez's front door. one chance to make it happen. >> when we get there, yes, our adrenaline is pumping. this is a homicide suspect. >> her fear. if they don't get this right, the investigation is finished, art gutierrez walks. justice for christie fleming and her family, out of reach forever.