happened. she just knew that she had taken some pills, i believe. >> how did she get them? >> i believe dawn gave them to her. >> remember how teresa was stressed out those last week weeks of her life? the night of the casino trip she said dawn gave her xanax, the anti-anxiety medication to calm her down, dawn told her. it certainly did that. out like a light, calm, for two whole days. >> i looked at her, i said teresa, you need to stay away from that woman, she is no friend of yours. >> how did teresa respond to that? >> she said i've learned my lesson. >> or maybe she didn't. because the morning of the murder teresa had arranged to run errands with dawn, or at least that's what dawn said. and then it all clicked together. dawn on the dirt road, a gun in a plastic bag, teresa's car window down as though she knew her killer. sheriff ellis and corporal boyd picked apart dawn's early