lindsey wade was just 11 years old when two young girls in her hometown were murdered within a matteras the years passed, wade's obsession with the cases grew. now, she was a detective, and hoped advances in dna technology would help her unmask the killer. but what she was about to learn would completely transform the investigation. here, again, is keith morrison with "evil was watching. " >> michella was so fierce. there really wasn't anything that intimidated her at all. she just took life, head on. >> it never left them. the spirit that was their sister followed them all around their growing-up years, and when they had families of their own. and they knew, always did, that their mom had lost a piece of herself. >> be all together, in this family environment. and then, just this closing would come down over her. >> yeah, and she'd just bawl. >> yep. you want mom back. >> the mystery of who killed michella and jenni haunted two families for nearly-30 years. all they knew, or thought they knew, was that some, unknown man, assaulted and killed those little girls. this man, who had kill