Leslee Larson / Penny Parker

While hiking with her husband Dennis in Montana, Leslee Larson fell into Wolf Creek. After cashing in a double indemnity insurance policy, Dennis eventually lands in Maine, where he's convicted of murdering wife number three, who "fell" from a cliff.

See how Montana detectives flush their wolf from the creek - 25 years later. When 15-year-old papergirl Penny Parker goes missing, her body is found by a search volunteer. Watch cold case detectives find a genetic trace to the volunteer, 24 years after the crime took place.