Klein, well-known criminologist and police consultant, tells the story of a gang cop who is deeply engaged in battling his street gang opponents. The author reveals the dangers of police elite units when a 'tough cop' begins to rationalize the use of police violence and corruption. Klein assesses the training and skills of the gang cop, and current gaps in our knowledge of street gangs. This book is for law enforcement personnel, lawyers, criminologists, and community and governmental agencies concerned with the proliferation of gangs in America's towns.