In this biography of August Vollmer, Police Chief of Los Angeles then Berkeley during the 1920's, heavy emphasis is placed on his crusading innovations which eventually revolutionized the concept of police work throughout the United States. Fictionized and simply written, Vollmer's accomplishments are presented from his days as boy Marshall when the teeming refugees from the San Francisco fire called upon him to assume a man's work to his days as Chief and reorganizer of forces in Havana, Detroit and Chicago. A man of courage and principle, who believed in the importance of science and intelligence in police work, adopted the unknown and discarding the obsolete held no fear for him. Vollmer was responsible for use of the lie detector, reorganization of city jails, rehabilitation practices in prisons, recruitment of ""college cops"", dismemberment of gambling houses, guided always by general principles of criminology. An interesting low pitched account.