linda's best friend, mary seabold.eporter: conceivable that maybe something she picked up there had something to do with that? >> no. that's not what happens. not unless you're in the reactor. >> reporter: and she never did that. >> no, no. not at all. >> reporter: they considered other, darker possibilities. you know there are people who make themselves sick because they want to be the center of attention. >> sure. she wasn't of that personality. >> reporter: possible that she was depressed? >> she loved her job. she had friends. >> reporter: she had the perfect husband? >> perfect husband, a lot of nice high heels. what could she be depressed about? >> reporter: linda's autopsy was inconclusive. her death certificate listed the cause as "pending investigation". and sheriff's detectives did investigate. >> the interview is taking place at mr. curry's residence. >> reporter: in december 1994, six months after linda's death, they interviewed paul. >> did you ever question them why they never found what was wrong with he