They were the 3 musketeers. One of them was a killer.

In February 1980, 18-year-old University of South Alabama freshman Katherine Foster was supposed to meet her two best friends for a trip to the mall. She never showed up. Days later, a search party found her body in the woods just a few hundred yards from campus -- laying flat on her back, fully clothed, makeup intact, looking for all the world like she had simply laid down to take a nap. She had been shot twice in the head. Investigators were baffled. There was no struggle, no drag marks, no sign of sexual assault. Whoever did this, Katherine had trusted enough to walk into the woods with.

Police chased every lead they had, but Katherine's case went cold for more than 22 years. Until a single phone call from an AA sponsor changed everything.

Ed and Melissa cover the fu ...