but the world doesn't work like that -- except, perhaps, in san saba. just after midnight, carl pressley responded. he was in normangee, texas. he told the sheriff where he and his girlfriend lived in a trailer at an rv campground. though normangee is more than three hours from san saba, carl promised the sheriff that he would be back by day break. >> so i think maybe about the time my eyeballs closed -- my phone rang. and it was about 7:00 in the morning. and dispatch told me that carl pressley had showed up to the sheriff's office and sheriff brown needed me up there asap. >> reporter: and so with little or no sleep, deputy wilkerson says he headed back to the office and a face to face encounter with the man most likely to know where bonnie harkey was. >> devote care talker dead matriarch missing . >> >> coming up, another life in danger? >> he had three knives on him, i had to do what he said. >>nd a dark secret, down by the creek. >> right there, right there! >> when "dateline" continues. er! >> when "dateline" continues [♪♪] did you know, you no lo