CompStat famously cut New York City's crime rate in the 1990s by allowing police officers to map crime and create crime-intervention strategies. Using CompStat as a guide, Washington, D.C.'s Court Services and Offenders Supervision Agency, which oversees 15,000 parolees, supervised releases and probationers, created a similar system to cut the District's recidivism rate. SMART-STAT is a risk-assessment and performance-management tool that gathers information about parolees from local, state and federal data sources and provides that information to case officers to aid in offender reintegration, rehabilitation and public-safety efforts. Data sources include court hearings, police booking reports, displinary actions, drug testing and treatment participation, DNA, and global positioning devices. The data is used alongside an individual offender's information to tailor supervision to each parolee, giving CSOSA the tools to deliver the right program to the right person at the right time. While the national recidivism rate is 67 percent within three years of a parolee's release, CSOSA's recidivism rate is 30 percent for offenders under its supervision.