In recent decades, both the media and legal scholars have documented the widespread problem of prosecutors failing to disclose favorable evidence to the defense – so called Brady violations. Despite all of this documentation however, many ethical prosecutors reject the notion that the criminal justice system has a Brady problem. These prosecutors – ethical lawyers who themselves have not been accused of misconduct – believe that the scope of the Brady problem is exaggerated. Why do ethical prosecutors downplay the evidence that some of their colleagues have committed serious errors? This essay, in honor of Professor Bennett Gershman, points to what psychologists have termed social identity theory and ingroup bias. Under these concepts, peop...