lucky break. no really. >> and i was laying in bed and my wife came in and unfortunately when you work these cases all you talk about is we're a dedicated cold case team. you're talking about the case you were working. i'm sure she was tired of hearing it. but she said why don't you establish a facebook account for carol? i thought that could actually accomplish a great deal. >> of course back in 1981 is when carol disappeared facebook creator mark zuckerberg wasn't even born yet. but he knew social media's ability to connect people around the globe instantly could determine whether carol was alive or dead. >> we know that it's a place where we say here i am. it's also a place where you could find people. >> surely if carol was still alive, someone on facebook or twitter would know something. of course he also knew carol would look fastly different so