>> you ever walk in the country? >> i did. >> he'd mapped out a place where he used to keep bees. >> how large is the area? that you actually dug out for her? >> did you go pretty deep? >> probably four feet. >> even if he was telling the truth, locating cindy's body would be extremely difficult. it had been 22 years, she'd been buried by a river known for flooding its banks. maybe her bones had carried downstream. even though mac had promised her father, maybe poor cindy was just destined to remain missing. coming up, a dramatic journey, a killer taken in chains to the place where he says he buried cindy. >> i'll tell you, she -- she was calling to us. and we weren't going to leave that area without her letting us know where she was.