New crime-prediction software used in Maryland and Pennsylvania, and soon to be rolled out in the nation’s capital too, promises to reduce the homicide rate by predicting which prison parolees are likely to commit murder and therefore receive more stringent supervision.

The software aims to replace the judgments parole officers already make based on a parolee’s criminal record and is currently being used in Baltimore and Philadelphia.

Richard Berk, a criminologist at the University of Pennsylvania who developed the algorithm, claims it will reduce the murder rate and other crimes and could help courts set bail amounts as well as sentencing in the future.