Police: Streetcorner Politicians"This book . . . examines the problem of police corruption . . . in such a way that the stereotype of the crude, greedy cop who is basically a grown up delinquent, if not an out and out robber, yields to portraits of particular men, often of earnest good will and even more than ordinary compassion, contending with an enormously demanding and challenging job."Robert Coles, New Yorker "Other social scientists have observed policemen on patrol, or have