Decades later, mother pleads guilty in baby's death discovered by dog.

Lee Ann Daigle pleaded guilty to manslaughter in the death of her newborn, whose body was discovered by a dog in a Maine gravel pit nearly 40 years ago. Advances in DNA technology helped break the cold case open, and Daigle was identified as the baby's biological mother. While both parents were found alive, only Daigle was charged. Her sentencing is scheduled for June 20. Maine has a "Safe Haven" law that allows parents to surrender babies less than 31 days old to designated providers.