In earlier times, down in southern prisons, chain-gang style penal practices, lynchings, and prosecutorial bigotry were common. Often, racial minorities were tried by all white juries in all white courtrooms. In 1910, African Americans had made up 31 percent of the prison population. The sentencing laws were discriminatory, the harshest sanctions were being given to blacks, and the police were not much help either. They played a part in racial violence by encouraging or failing to restrain mobs. Over the last century, police instigated or participated in race riots in many different cities. Because of the behavior of police, it encouraged hostility and violence towards minorities. However, over the past fifty years, things had begun to change. Legislation and U.S. Supreme Court cases became inspired by the civil rights movement and other reform movements which led to the discrimination based upon race unconstitutional.
Law enforcement policies and practices placed better emphasis on professionalism and accountability. Though open discrimination has lessened in the criminal justice system over time, currently we continue to fight unfairness in the justice system. There are still racial and ethnic disparities that persist in the criminal justice world in the United States. Thanks to the work of W.E.B. Dubois on race and criminality, researchers have made great strides in figuring the causes and consequences of racial/ethical disparities in criminal justice