karen packs holly's lunch and then she's off to teach second grade at scotts hill elementary. you say good-bye before you left? >> she was sitting at the kitchen table. studying and i kissed her goodbye and told her i loved her. just like every other morning. >> reporter: holly gathers her lunch and homework and walks out to get into her mustang in the carport. at about 7:40, holly's older brother, clint, is asleep in his bedroom, the house is quiet. until the scream. >> around 7:40 that morning, a neighbor was getting ready to go to work, and was outside and he heard a scream from next door. >> holly screamin', "stop, stop, stop it!" >> reporter: her brother clint doesn't hear holly screaming, he wakes up to the family dog barking. >> so i decided to get up. see what he was barking at. >> reporter: clint hears voices in the carport behind the house. >> i listened just briefly, and i could tell it was a male, and a female voice. i never was really able to tell what they were saying. >> reporter: you couldn't tell if they were shouting, if they were arguing? >> well, as i liste