police detective walt delsigne worried away at the carol lubahn file, drawn by an irresistible hunch t this young mother did not disappear voluntarily, but actual evidence of a crime? just wasn't any. finally in 2010, 29 years after carol supposedly walked out on her family and never came back, delsigne decided it was time for a surprise visit to michael lubahn. he went over with his sergeant. >> he invited us in. we did catch him unexpectedly, but that was the plan. >> but was mike upset or thrown off? not at all. >> very nice like i anticipated he would be because i'd now heard from everybody in the family how mike's a good guy. >> so together they went over again the details of that last night back in march, '81. and right away, mike remembered a little more about the night carol presented him with a real estate contract and a demand they sell their tiny house. >> she came here and -- no, did she say walk away -- >> she said "you make my skin crawl." >> "you make my skin crawl." yeah. i thought being -- i bet she did say that. i pushed him for some more details. >> and the details