their mother, 34-year-old nikki whitehead. >> as you walked in -- >> the mess that greeted arriving conyers police detective chris moon told a terrible story. >> this was a long, drawn-out fight. nikki was fighting for her life for several minutes. this was not a quick attack and over with. she fought here. she was struck in the back of the head. she had a laceration to the back of her head. there was blood on the door, on the door handle as if -- >> as if somebody tried to get out of -- >> to get out, yeah. then along this wall, you could see a bloody imprint of hair braids, which nikki had her hair in braids, where she fell, slid down the wall. the most severe blows came when she was facedown in this area. this is clearly where the assailant got on top of her from behind and started stabbing the base of her neck. >> a huge amount of blood here? >> yes. this was the largest pool of blood, in this area here. >> she was dead, or near dead, when her assailant dragged her to the bathroom. and that's where she was in a tub of wate

it was really pure luck that brought nikki whitehead to this house, in this quiet, safe neighborhood. just far enough away from atlanta, that capital of overheated ambition down the highway. he in conyers, she could give her beautiful twin daughters a better life than hers. but of course luck, fortune, fate can go either way. sometimes in ways very hard to comprehend. >> everything about this goes against nature. >> how could somebody do that? >> it was definitely the bloodiest crime scene i've ever been to. >> in the next few minutes, you will know exactly when it happened, where it happened, how it happened. but, of course, the real question is why it happened. and the answer t co that, as you complicated. but that's how nikki whitehead's life was. >> i loved everything about nikki. >> yucca harris grew up with nikki, could see she was a wild child, pretty, fun, and irresistible. >> nikki was, to me, a phenomenal, amazing person. >> yes. and she was effervescent, said nikki's mother, lynda. bigger than life. >> she was the kind of person that when she comes in a room, she just takes