***With a brand new chapter, updates on the investigations, 8 pages of exclusive photos, and a behind-the-scenes conversation between Billy Jensen and retired detective Paul Holes on the Golden State Killer, their favorite cold cases, and more***The New York Times bestselling true-crime hit, now in trade paperback!Journalist Billy Jensen spent fifteen years investigating unsolved murders, fighting for the families of victims. Every story he wrote had one thing in common—they didn't have an ending. The killer was still out there.But after the sudden death of a friend, crime writer and author of I'll Be Gone in the Dark, Michelle McNamara, Billy became fed up. Following a dark night, he came up with a plan. A plan to investigate past the point when the cops had given up. A plan to solve the murders himself.You'll ride shotgun as Billy identifies the Halloween Mask Murderer, finds a missing girl in the California Redwoods, and investigates the only other murder in New York City on 9/11. Y