>> she killed herself with an overdose of barbiturates. >> when my daughter was killed, she was killed. simple. >> michelle's mother left a suicide note which included one last wish. >> george actually showed me that note that said, when you find our daughter, bury her remains next to me. bury her beside me. >> with no evidence of foul play, and without a body, the case of michelle wallace's disappearance went completely cold. >> because of the difficulties in proving the crime of murder without being awfully darn sure that your victim is dead. >> five long years passed, until investigators got another potential break. a hiker on an isolated trail found what looked like a clump