There is no statute of limitations on murder. Homicide is one crime you pay for, but first you must be caught. In New York City, thousands of murders remain unsolved. Where does the police department begin after an unsolved case has gone cold? In this fascinating, in-depth narrative, a writer uses her unprecedented access to chronicle the inner workings of the elite unit of homicide detectives charged with the overwhelming task of solving cold cases going back as far as 1951.