john lewen and the cold-case team believed mike lubahn killed his wife carol back in 1981.y had one big problem. they couldn't prove carol was dead. >> the biggest assumption is going to be how do you know she gent across the country or changed her identity? >> kind of an important question with no answer. and then in january, 2011, jim wallace got the flu. lucky break -- no, really. >> and i was laying in bed, and high wife came in. unfortunately, when you work these cases, all you talk about is we are a dedicated cold-case team. you talk about the case you're working on. i'm sure she was tired of hearing about it. she said, why don't you establish a facebook account for carol. i thought, that could accomplish a great deal. >> of course back in 1981 when carol disappeared, facebook creator mark zuckerberg wasn't even born yet. but 30 years later, detective wallace knew social media and its potential to connect to millions around the globe instantly. it could determine once and for all, he thought, whether carol was alive or dead. >> because all of us know from using facebo