This book is a brilliant, enlightening, and meticulous analysis of how the knowledge that comes to exist in police investigations and court procedures is produced. It provides a very credible explanation for the gap between what most people see as "self evident" truth, and what comes to be accepted as "truth," for the purposes of police investigations, and highlights the difference between what ordinary people believe to be happening, and what is actually happening when the police "investigate" crime. A must read.