In an effort to be more fair and to avoid adding to already high imprisonment rates in the US, courts across America have started using quantitative risk assessment software when trying to make decisions about releasing people on bail and sentencing, which are based on their history and other attributes. It analyzed recidivism risk scores calculated by one of the most commonly used tools, the Northpointe COMPAS system, and looked at outcomes over two years, and found that only 61% of those deemed high risk actually committed additional crimes during that period and that African-American defendants were far more likely to be given high scores than white defendants.