This book dives into the shocking use of genealogy databases that led to DeAngelo's 2018 arrest, forever changing criminal investigations and bringing an end to a reign of terror. The Golden State Killer case captivated the public and became a true crime phenomenon, spurring documentaries, podcasts like My Favourite Murder, and even TV shows such as Unbelievable and Mindhunter. Now, this book uncovers the behind-the-scenes work that led to the identification of DeAngelo. With thrilling insights into the science of familial DNA, this book is a must-read for fans of Making a Murderer and The Jinx. True crime buffs won't want to miss this deep dive into one of the most astonishing criminal cases of the 21st century, combining cutting-edge forensic science with a truly evil villain.