she called her grandmother reba at her home in prattville, a town two hours away. >> she said is mama down there at your house? >> i said no, hon., she's not here. and she said, mama didn't come home last night. >> what was going on in here? >> i'm just turning upside down. you know, i'm just tied in a knot. >> reba called teresa's younger sister ashley at her office at the local circuit court. >> mama called me up. she said teresa is missing. i said let me make some phone calls. >> right away ashley called the sheriff of her town and he called the sheriff of ellis. his response to me was it's bad. it's bad. >> it certainly was. they had found teresa's truck on a dirt road less than a mile from home. she was slumped behind the wheel and she was dead. and this much was perfectly clear. it wasn't an accident. >>> coming up -- the investigation begins. >> we had to ask ourselves, who would get her to this location and why was she murdered? >> when "dateline" continues. >>> it was a lover's lane. a quiet dusty, dead-end road miles from main street moundville. a spot so uncommonly traverse