taken courses on how to interrogate criminals. immediately, the young intern was fascinated by cindy's case file. she picked it off her boss' desk when he wasn't looking. >> i've since admitted it to my boss, i read the file, and it really was contagious. i took that file home with me almost every single night and just kept rereading it. >> jen leibow, was at the time, an undergrad studying for a communications degree. she quickly became obsessed with suburban detroit teenager who disappeared when she herself was only 4. >> and then i brought it up to my bosses and they allowed me to call mac and see if, you know, i can be an extra set of hands for him. anything he needed. you know, as a new investigator, i could learn from him, but i could also help him out. >> and the phone relationship would remain for the next 2 1/2 years. mac, back in eastpointe, doing the shoe-leather investigating, as he had time for, and jen leibow going digital, diving into a stuff that was mostly a