happened to be a childhood friend of tom waring, watched kate waring grow up.n rivers told the police chief he was worried about kate, too. >> and he told me that, you know, they got a lot of stuff going on. >> sure. >> but that he would assign his best and brightest to the case. and i felt pretty good about that. >> but now almost two months later, kate was still missing. and the investigation such as it was had accomplished nothing. and john rivers couldn't stand what it was doing to his best friend, tom waring. >> i could see that he really was having a hard time functioning. >> so rivers picked up the phone again and told this man, "do what it takes." his name is andy savage, former prosecutor, now famously tenacious criminal defense attorney. savage had heard about kate, too, and how police had no evidence of any crime. really? >> as soon as we scratched the surface just a little bit, we were absolutely convinced that foul play was involved. >> savage was given just two mandates -- find kate waring, tell police everything you find. that last part, keeping