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This is the case which served as the hallmark of DNA genealogy used to solve crimes. It seemed to be happenstance that a woman CeCe Moore in California began investigating genetic genealogy not realizing that she was about to fall into a rabbit hole. Since then, she was able to lend her knowledge of this technology to solve crimes. That's where Detective Jim Scharf comes in to solve a cold case of a double murder: Tanya Van Cuylenborg /Jay Cook.