Chicago sits amid a national opioid epidemic with devastating social, health, and economic consequences. The opioid crisis disproportionately affects communities on the city’s West Side, where open-air markets supply most of Chicagoland’s heroin. Traditional responses have centered on criminal sanctions, as in the mandatory minimum sentencing that contributed to mass incarceration in the late 1980s, or the threat of criminal sanctions, as in the drug courts that began operating in the 1990s and continue today.
NADP Research Brief
Research Brief for the Narcotics Arrest Diversion Program.
NADP CPD Directive
Read more about the CPD directive regarding NADP.
NADP Working Paper
Read more about the technical details of the study.
Video about the Narcotics Arrest Diversion Program
This video provides an overview of the Crime Lab’s evaluation of the Narcotics Arrest Diversion Program, a program implemented by the community behavioral health provider Thresholds.
For people with substance use disorders who are apprehended by the police, NADP offers a supportive, rather than punitive, intervention that seeks to address the root causes of opioid use. Those eligible for diversion are connected with a substance use counselor, are released without criminal charges, and face no threat of future prosecution related to the arrest. Because the program aims to reduce the amount of contact people with substance use disorders have with the criminal justice system, NADP is unique because it diverts people before they are formally charged with a crime.
NADP is the most extensive effort of its kind in the United States—as of June 2023, NADP has connected over 1,500 people with treatment. Initially implemented on Chicago’s West Side in 2018, the program expanded citywide in November 2021.
Researchers from the University of Chicago Crime Lab and Vanderbilt University are evaluating the impact of NADP on participants’ later criminal justice involvement and risk of overdose. Early findings indicate that the vast majority of people who are diverted go on to start treatment, and over half of those who start treatment remain engaged for over a month. Those eligible for diversion were also significantly less likely to be re-arrested. Ultimately NADP demonstrates that a sanction-free response to the opioid crisis is not only possible but highly effective.
The Chicago Police Department and the Chicago High Intensity Drug Trafficking Area developed NADP in partnership with community behavioral health provider Thresholds and researchers at the University of Chicago Crime Lab and Health Lab.