I had not heard of this - but have heard about the concept. Here is more info for everyone about COMPAS:
The DOC uses COMPAS as its statewide automated risk and needs assessment and unified case planning system. This actuarial risk assessment system contains offender information specifically designed to determine their risk and needs and inform dynamic case plans that will guide the offender throughout his or her lifecycle in the criminal justice system. The lifecycle is a framework for how an offender moves through the Wisconsin criminal justice system and the decision points informed by COMPAS along the way. From the time of arrest through eventual discharge, DOC will use the lifecycle as a framework for establishing meaningful practices and interventions across jurisdictions.
and more analysis on these types of instruments:
How We Analyzed the COMPAS Recidivism Algorithm