Almost 48 years ago, eight-year-old Gretchen Harrington went missing after leaving her home in Marple Township, PA. Gretchen was last seen walking to her vacation Bible school, yet she never made it there. On October 14th, 1975, nearly two months after her disappearance, Gretchen's remains were found in Ridley Creek State Park. For decades, the identity of Gretchen's killer remained a mystery. However, on July 24th, 2023, 83-year-old retired pastor David Zandstra was charged with her murder. 
 
Delaware County District Attorney Jack Stollsteimer breaks down the timeline of events and explains how police were led to examine Zandstra as a suspect. Later, he shares why bringing justice to Gretchen and her family all these years later was so important to him.
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