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This Friday, April 17: Disappearance at the Dairy Queen

In a special two-hour Dateline, correspondent Dennis Murphy reports on the mysterious disappearance of a young woman in a Detroit suburb. Cindy Zarzycki was only 13 years old when she was last seen at a Dairy Queen in her hometown of Eastpointe, Mich. in the spring of 1986.

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For eight years following Cindy's disappearance, her case was treated as a runaway. That is, until Detective Derek McLaughlin was promoted to the Eastpointe's Youth Bureau detective division and took over the case. With the help of a college intern, Jen Leibow, as an investigator, this dedicated team worked tirelessly for years to solve Cindy's case and bring her family closure. Watch it Friday at 9 p.m. ET, 8 p.m. CT.