and pretty soon kathy and todd moved into a big lakeside house in georgia with a boat and fancy cars and, of course, an airplane. kathy, always so nurturing, told her friends she was ready to take the next step. >> i remember kathy calling me and telling me that they were living in georgia and she was excited about it and she wanted to have children. i was excited for her because i can see her with little kids. >> but, nine years into what looked like a happy marriage, children had yet to arrive. and now we know because of what was in that blue box they never would. time to find out what happened. who knew that the discovery in that box would bring investigators all the way across the country to the blue ridge mountains of north georgia to a campsite high on a hill. here was a lonely place that had kept its secret long enough. coming up. >> i was sleeping in my tent and i heard somebody shouting