and she's missing. >> reporter: marty, lynsie's older friend who kept their relationship a secret and lied about his name. and chris -- >> reporter: and so larry sat down and read through the entire case file. all the witness statements. all the interviews. he did that for two years. >> here we go down this road again. >> reporter: he watched the february 2001 interview that police did with a very unhappy marty. doesn't it strike you as tremendously suspicious that marty would call after lynsie disappears, talk to lynsie's mother and give a phony name? >> if you didn't know the background of marty, then absolutely. >> when i talked to the mother on the phone, i just gave an identifier, okay? i mean, marty rossler.