locked horns with livers. despite his continued denial of involvement, they knew he was lying. >> we've had too many people sitting in that chair that think they're smart and they're not. >> no. you're dumb as a brick. okay? you made a mistake. and you got to pay for it. >> reporter: why were investigators here in nebraska so convinced matt livers was lying? well, besides the polygraph, there was the state profiler who suggested that this is the sort of crime committed by young males who know their victims. how else would they know to find the farm house way out in the middle of nowhere if they didn't know them? and add to that, said the profiler, this is the sort of crime that appeared to be very personal. an execution. matt livers rang those bells, all of them and rang them loudly. eventually, detectives got quite explicit, telling livers he was headed for death row. unless he would start giving