as an unsuspected dawn sat in her cell reviewing her case file, her cellmate walked in and waited for some incriminating tidbit. what she got instead was the whole sickening story. here's what dawn told her cellmate about the morning teresa was killed. around 7:00, dawn called teresa with a lie to set the plan in motion. >> i [ bleep ] wasn't taking any more vacation days. >> she claimed her car had broken down nearby. could teresa come pick her up. but of course she said yes, finished drying her hair, got into her car, made the short drive to that dirt road, and there standing alongside the road was dawn. >> with calculated, cold precision, dawn lavender lured teresa to that dirt road, shot her in the back of the head and steered her car into the brush, hoping it would stay hidden for a while. >> cold blooded killer. >> really, if you think about it, that's exactly right. >> yeah. terrible looking at it that way, though. [ bleep ] >> it was all there. a prosecutor's dream confession. she even referred to herself as a cold-blooded killer. but there was one question anyone with a beati