significant leads at this point. >> reporter: would never know that a curious, sympathetic, puzzled nation had cast an eye her way. laci peterson. she was 27 years old. and, on the night before christmas, she was gone. >> laci, if you're out there and can hear us and see us, we love you and we're searching, we're looking. >> reporter: it hit something. something in the air. the zeitgeist, that name, that smile, that mystery, impossible to put down. >> whoever has her, please, please, please let her go. bring her back to us. >> we love her so much. and we want her back. "please let us have her back." >> reporter: and then there was him. the husband. the inscrutable scott peterson. >> i really don't care what