
COMPAS Algorithm
Racial Bias in Criminal Sentencing
Courts across the United States adopted COMPAS (Correctional Offender Management Profiling for Alternative Sanctions), an AI system that predicts recidivism risk to guide sentencing and bail decisions.
- 01TRIGGERCourts across the United States adopted COMPAS (Correctional Offender Management Profiling for Alternative Sanctions),…
- 02MACHINE ACTIONDecision system
- 03MISSING GATENamed SME review and decision audit trail
- 04IMPACTRights & due process
The short version
Courts across the United States adopted COMPAS (Correctional Offender Management Profiling for Alternative Sanctions), an AI system that predicts recidivism risk to guide sentencing and bail decisions.
Case telemetry
- INCIDENT
- SS-IR-003
- DATE
- 2013-Present
- SYSTEM
- COMPAS Algorithm
- LOCATION / SCOPE
- United States
- EVIDENCE
- Official finding
- AI ROLE
- Decision system
- HARM
- Rights & due process
- SOURCES
- 1 cited record
The event
Courts across the United States adopted COMPAS (Correctional Offender Management Profiling for Alternative Sanctions), an AI system that predicts recidivism risk to guide sentencing and bail decisions. A ProPublica investigation found the algorithm was twice as likely to falsely label Black defendants as high-risk compared to white defendants, while being twice as likely to falsely label white defendants as low-risk.
What the machine did
COMPAS used 137 features to generate risk scores. Judges used these scores - often without understanding the underlying model - to make bail, sentencing, and parole decisions. The algorithm's inputs correlated with race through proxy variables like zip code, employment history, and family criminal history. No human SME reviewed the model for bias before deployment to courtrooms.
Where the failure landed
Thousands of defendants received harsher sentences based on a biased algorithm. Black defendants who did not reoffend were flagged as high-risk at nearly twice the rate of white defendants. The system remains in use in multiple jurisdictions despite documented bias.
Official finding
Supported by a court, regulator, inquiry, or other official record cited below.
SOURCE RECORD UPDATED 2026-07-09
1 cited record
- 01Secondary / analysisProPublica: Machine Bias (2016)
Named SME review and decision audit trail
The failure pattern in this case: Automated judgment without accountable review.
The moment the path could change
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