Since 2018, all justice authorities in German-speaking cantons have used ROS (Risikoorientierter Sanktionenvollzug). In the framework of ROS, the system «Fall-Screening-Tool FaST» labels prisoners ‘A’ when they have no risk of recidivism, ‘B’ when they could commit a new offense, or ‘C’ when they could commit a violent crime. Prisoners can be tested several times, but subsequent tests will only allow them to move from category A to B or C and not the other way around. A report by SRF revealed that only a quarter of the prisoners in category C committed further crimes upon being released (a false-positive rate of 75%) and that only one in five of those who committed further crimes were in category C (a false-negative rate of 80%), based on a 2013 study by the University of Zurich. A new version of the tool was released in 2017 but has yet to be reviewed.