The Washington Post was beside itself about the use of computerized “predictive policing,” where computer algorithms are used to assess the risk of recidivism and to set gaol sentences: https://www.washingtonpost.com/opinions/big-data-may-be-reinforcing-racial-bias-in-the-criminal-justice-system/2017/02/10/d63de518-ee3a-11e6-9973-c5efb7ccfb0d_story.html.
The WP feels that racial bias creeps in because the initial data fed into the computers makes blacks and Latino defendants look riskier than Whites. There are racial biases in arrest and conviction rates because – the liberal faith has it – the existence of “racial biases,” so a Black or Latino defendant will be more likely to have a prior conviction than a White.