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DGC Book Club – The Forever Witness: How DNA and Genealogy Solved a Cold Case Double Murder by Edward Humes (2022) Nonfiction

August 21, 2025 @ 12:30 pm


Brown bag lunch 12:30 – Book discussion begins 1:00 in the Genealogy library.

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A relentless detective and a civilian genealogist solve a haunting cold case—and launch a crime-fighting revolution that tests the fragile line between justice and privacy.


In November 1987, a young couple from the idyllic suburbs of Vancouver Island on an overnight trip to Seattle vanished without a trace. A week later, the bodies of Tanya Van Cuylenborg and her boyfriend Jay Cook were found in rural Washington. It was a brutal crime, and it was the perfect crime: With few clues and no witnesses in the vast and foreboding Olympic Peninsula, an international manhunt turned up empty, and the sensational case that shocked the Pacific Northwest gradually slipped from the headlines.


In deep-freeze, long-term storage, biological evidence from the crime sat waiting, as Detective Jim Scharf poured over old case files looking for clues his predecessors missed. Meanwhile, 1,200 miles away in California, CeCe Moore began her lifelong fascination with genetic genealogy, a powerful forensic tool that emerged not from the crime lab, but through the wildly popular home DNA ancestry tests purchased by more than 40 million Americans. When Scharf decided to send the cold case’s decades-old DNA to Parabon NanoLabs, he hoped he would finally bring closure to the Van Cuylenborg and Cook families. He didn’t know that he and Moore would make history.


“Thought-provoking true-crime thriller…the book raises urgent questions of balancing public and private good that we’ll likely be dealing with as long as the title implies.”—Wall Street Journal

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To find a copy of the book, we recommend a public library, audible.com, Amazon, local bookstores, eBay, AddAll.com, betterworldbooks.comthriftbooks.com and other locations for used books.