A mystery looms over a small New York town when a woman is murdered and a stunning secret is exposed; more than a decade later, new developments lead to an unexpected conclusion.

Idaho resident Christopher Tapp is sentenced to life after falsely confessing to the murder of his friend Angie Dodge. When the real killer is caught over 20 years later, the case appears to finally be closed until a chilling twist begins a new chapter in the decades-long saga. Friday's two-hour episode features the latest developments, including correspondent Keith Morrison's sit-down with Tapp. 

NEW INTERVIEWS WITH: Chris Tapp, Bill Squires, Jeremy Sargis, Steven Drizin, CeCe Moore.