THE INVESTIGATION, WHICH PRODUCED MORE INDICTMENTS, AND CONVICTIONS OF POLICEMEN THAN ANY IN PREVIOUS HISTORY, IS TOLD BY A MEMBER OF THE CHICAGO PROSECUTOR'S STAFF. IT DESCRIBES THE DETECTIVE WORK THE ASSEMBLING OF EVIDENCE, THE LINING UP OF WITNESSES, AND THE COOPERATION BETWEEN FEDERAL & LOCAL AGENCIES OF LAW ENFORCEMENT. THE BOOK SUGGESTS REMEDIES FOR TRAINING OF OFFICER TO AVERT FUTURE POLICE CORRUPTION. (AUTHOR ABSTRACT MODIFIED)...BDS