The Judicial Oversight Demonstration (JOD) was designed to test the feasibility and impact of a coordinated community response to intimate partner violence (IPV) that placed the courts and justice agencies in a central role. The Urban Institute conducted a detailed process and impact evaluation in three sites. The demonstration received mostly positive responses from justice system agencies, service providers, offenders, and victims. However, reductions in repeat violence did not occur in all sites. The mixed results indicate that the most effective justice system responses to IPV must include a focus on protecting victims, close monitoring of offenders, and rapid responses with penalties when violation of court-ordered conditions are detected.