Knock - Knock

He knocked. He said there was a leak. And when they opened the door, their lives changed forever. For nearly a decade, a predator moved through the Bronx, targeting women and young girls in their own homes. He was cunning, brazen, and maddeningly lucky. Witnesses described him so differently that police ended up with twelve sketches of one man. Every lead seemed to end with the same frustrating words: needle in a haystack. Detective Paul Morrison of the NYPD's Bronx Special Victims Squad made the victims a promise he wasn't sure he could keep: he would find the man responsible. For more than two years, Citywide Rape Pattern No. 6 consumed Morrison's life. He studied with FBI profilers, walked the streets of Norwood on his days off, and watched the new science of DNA databases turn cold cases into a growing pattern. Then, finally, came the arrest. And within hours, the suspect walked out the front door. Knock-Knock is the true story of one of New York City's most relentless manhunts, told by the detective at its center. It takes readers inside the Special Victims Squad, a desperate citywide search, and a teenage girl's story that cracked the case wide open. Gripping, honest, and deeply human, this is a story about obsession, accountability, and justice. Open the door to the case that defined a detective's career.