Who watches the watchers? Nothing could have prepared Cynthia Wilkinson on that first day in February 1990, for what she was about to experience as an officer in the Cook County jail. She would meet inmates from all walks of life, of diverse nationalities, and accused of every horrific crime imaginable-including murder and cannibalism. She would also meet far too many guards who were distinguishable from the inmates only by their uniforms: drug dealers,...