An action-packed story from the “87th Precinct” series about the emergence of teenage gangs in city neighborhoods populated by immigrants from Puerto Rico, about the difficult struggle of the police with a hardened criminal. Events take place over the course of one day.' Incidents are being investigated: the suicide of a girl and the gas poisoning of a loving couple. The investigation has reached a dead end. Hawes's guess turned the theory of suicide into a proven murder. The story by E. McBain, winner of two literary awards (1957 and 1986), paints a psychological portrait of the criminal. In this case, the police of the 87th precinct did not find any traces or evidence that was skillfully hidden by the visitors. Published in Russian for the first time.