lissa hits record on her phone. lissa's strategy, just listen to suna.to build trust. >> like i said, i've got nothing to hide. >> lissa thought if she was patient, suna might start telling her a story. >> those guys were down in bismarck, i did not get to see her, other than when she was in the car. >> what is suna's story? >> he said that he gave a ride to carla's brother-in-law and carla, and took them up to spirit lake. >> and kept going? >> yeah, and he did not see her again. >> did you believe him? >> no. >> well, i sure could use your help finding my niece >> like i said, sorry, i'm not trying to be an. >> fbi special agent joey virtually, also worked on carla's case. >> what did you think as you were listening to these calls? >> she did a great job of building trust with him, building rapport. >> what i hear anything, i'll contact you, you know what i mean? >> after more than 30 minutes, suna ended the conversation. >> i'll get a hold of you guys tomorrow >> lissa had no phone number for suna, no way to reach him . all she had was a questionable