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    Josh Mankiewicz Previews: Who Killed JonBenét?


    Josh Mankiewicz previews a Two-Hour Dateline Special on the case of JonBenét Ramsey. This year marks 20 years since six-year-old JonBenét Ramsey was found dead in the basement of her family's home in Boulder, Colorado. In the report, first-ever TV interviews with former Boulder PD Detective Jane Harmer, former Denver PD Detective Tom Haney and never-before-seen case documents. Airs Friday, September 9 at 9/8c.