one of them was cari cooper, the class instructor. she also went over to the house. turns out cari knew as much about crime scenes as she did about dance moves. that's because cari's a cop in nearby memphis. >> well, i kind of took on that police officer role at that moment. and i combed, like, every inch of her property looking for anything. >> did you find anything? >> i didn't want to miss a knock on the door. >> sure. >> i'm worried. >> chris told detectives something that could be vital to the investigation. he said heather had written him an e-mail the night before. the subject read, i'm sorry. in it, she mentions their little girl ava. it read, come get ava. i cannot face everyone with this. please forgive me. it is too much. please raise them to remember me as their loving mommy. how concerned were you when chris told you about this e-mail that his wife had sent, that heather had sent? >> i was concerned. it did not sound good to me. >> kent thought the e-mail was open to all kinds of interpretations. all bad, it seemed. >> it basically sounded like i'm throw