*"Stellar true crime"—Publishers Weekly (starred review)
*"Suspenseful... Fascinating... A winner..."—Booklist (starred review)
A relentless detective and an amateur 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 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, 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....