these areas. we are helicopters out looking in these areas, and still, we weren't able to recover a body. and roy's, i guess hypothesis, which seems to be credible and make sense, is that david returned to that location after the body had been disposed of and relocated it. >> yet again, david parker ray had been meticulous in avoiding detection. >> we spent a great deal of time chasing an intelligent man who was well versed in what he was doing, and certainly able to cover his tracks very effectively. we were always one step behind him. >> thousands upon thousands of deep narrow ravines, nooks, and crannies and where do you look? we could be standing above her right now and never know it. i often wonder how close did we actually come to her or some of the victims during the course of this. >> roy yancy pled guilty to second degree murder, receiving a 20-year sentence.