I Know Who You Are: How an Amateur DNA Sleuth Unmasked the Golden State Killer and Changed Crime Fighting Forever

"The amateur DNA sleuth who solved one of the most infamous cold cases in American history-the Golden State Killer crime spree-tells the incredible true story of how she did it, and explains how her methods have forever changed criminal investigations. In the span of just a few years, Barbara Rae-Venter went from researching her family history as a retiree to finding a serial killer who had baffled law enforcement for decades. I Know Who You Are tracks her improbable journey to becoming the nation's leading authority in investigative genetic genealogy, and to identifying the Golden State Killer-who had evaded authorities for forty-four years-in just sixty-three days. Rae-Venter also details other extraordinary cases that she has worked on, from the firstcriminal cold case she ever cracked-uncovering the long-lost identity of a child abductee-to the heartbreaking case of the Billboard Boy, which began with unidentified remains dumped along a North Carolina highway. When she looks at DNA data, Rae-Venter sees numbers, percentages, probabilities-but she also sees the very stuff that makes us who we are. Drawing on both her own experiences and insights from all the key players in her investigations, Rae-Venter brings readers inside her unique "grasshopper mind" as she analyzes DNA data; pores through obituaries, marriage records, and old newspapers articles; and envisions different scenarios that bring her closer and closer to her target. She lets readers join in on urgent calls from sheriffs, FBI agents, district attorneys, and researchers, and she takes us inside the struggle to obtain a usable crime scene DNA sample and other unexpected roadblocks that often make the search more difficult. Time and again, Rae-Venter pushes through setbacks, finds new angles of investigation, and uses the most cutting-edge new technology-much of it developed during her search-until, finally, a critical piece of the puzzle suddenly tumbles into place. I Know Who You Are captures the exhilaration of the moment of discovery in cold case investigations, but also the sheer depth of emotion that lingers around these cases and informs Rae-Venter's careful approach to her work. It is a story of relentless curiosity, of constant invention and reinvention, and of recognizing that we may not be who we thought we were"--
A retiree researching her family history explains how she used her knowledge of DNA data to uncover the culprit of the Golden State Killer crime spree, a cold case that had baffled law enforcement for decades. 35,000 first printing.
“A true-crime masterpiece written by a cold-case-cracking master. Barbara Rae-Venter’s investigative DNA work has revolutionized the way law enforcement hunts serial killers.”—John Douglas, New York Times bestselling co-author of Mindhunter “Barbara Rae-Venter isn't just the genealogy expert who helped capture the Golden State Killer—she’s an unsung hero who has given murdered women and children their faces and names back, the recognizing that their lives mattered.”—Maureen Callahan, New York Times bestselling author of American Predator For twelve years the Golden State Killer terrorized California, stalking victims and killing without remorse. Then he simply disappeared, for the next forty-four years, until an amateur DNA sleuth opened her laptop. In I Know Who You Are, Barbara Rae-Venter reveals how she went from researching her family history as a retiree to hunting for a notorious serial killer—and how she became the nation’s leading authority on investigative genetic genealogy, the most dazzling new crime-fighting weapon to appear in decades. Rae-Venter leads readers on a vivid journey through the many cases she tackled, often starting with little more than a DNA sample. From the first criminal case she ever solved—uncovering the long-lost identity of a child abductee—to the heartbreaking story of the Billboard Boy, whose skeletal remains were discovered along a highway, to the search for the Golden State Killer, Rae-Venter shares haunting, often thrilling accounts of how she helped solve some of America’s most chilling cold cases in the span of just three years.For each investigation, Rae-Venter brings readers inside her unique “grasshopper mind” as she analyzes DNA data and pores through obituaries, marriage records, and old newspaper articles. Readers join in on urgent calls with sheriffs, FBI agents, and district attorneys as she details the struggle to obtain usable crime scene DNA samples, until, finally, a critical piece of the puzzle tumbles into place.I Know Who You Are captures both the exhilaration of the moment of discovery and the sheer depth of emotion that lingers around cold cases, informing Rae-Venter’s careful approach to her work. It is a story of relentless curiosity, of constant invention and reinvention, and of human beings striving to answer the most elemental questions about themselves: What defines identity? Where do we belong? And are we truly who we think we are?