secret cliques of violent, tattooed sheriff’s deputies continue to operate in stations around Los Angeles County and that one may have played a role in a fatal shooting in 2016. County leaders reacted with alarm, and appropriately so, because it had been generally thought that these sorts of dangerous deputy gangs had been stamped out following a series of reforms several years earlier. It was necessary to find out if they had returned, or if indeed they had never left. Then-Sheriff Jim McDonnell promised a study and he was immediately joined by county lawyers, the inspector general and the Sheriff...