. >> marty rossler. >> and what did marty rossler say to her? >> marty said he's befriended lynsie's and concerned because he hadn't heard from her. >> what did you learn? >> marty rossler was not marty rossler. >> he was really marty pregenzer. he did not have a criminal record. what he did have was a relationship with lynsie that he hadn't told his wife about. he told police he'd often pick lynsie up and give her rides but that was about it. marty was 58. >> and she was 20? >> she was 20. >> and they were boyfriend and girlfriend? >> don't think so. >> so police brought in marty. over two days they recorded those interviews. at times on video and sometimes just on audio tape. >> when's the last time you saw lynsie? >> a week ago. >> no. i don't think so. >> absolutely. >> no absolutely not. >> and marty said he had last seen lynsie the day that she went to san diego on that friday. >> did you believe him? >> we really didn't believe him. >> they didn't believe him because of a tip they'd received, a clerk at a local clothing store had called t