By Alex Roth, Sandhya Kajeepeta, and Alex Boldin

Probation—a court-ordered period of supervision in the community for people convicted of criminal charges—has traditionally been viewed as an alternative to incarceration, and sentencing more people to probation rather than prison was long proposed as a solution to the problem of mass incarceration. (See “A brief history of probation” on page 2.) However, as the number of people on probation in the United States has grown massively and probation supervision has become more punitive over the past few decades, more recent reports have focused on how probation is contributing to mass incarceration. These reports explain how increasingly large numbers of people are having their probation supervision revoked and are then being sentenced to incarceration, often for noncompliance with conditions of supervision rather than new criminal charges. Although most of these reports mention both prisons and jails when discussing how probation violations have contributed to mass incarceration, they provide almost no specific information about how such violations affect jail populations. The information about probation’s impact on jails included in some of these reports is often extremely old and sometimes incorrect, propagated from reports that cite previous reports in a sort of game of statistical “telephone.” Meanwhile, other reports simply acknowledge the reality that there is no good national data on how probation contributes to incarceration in local jails. The lack of information about probation’s impact on jail populations is problematic because far more people are admitted to jails than prisons every year and jails are a driving force in mass incarceration generally, and jail populations are also marked by significant racial disparities. This brief will summarize what we do know about probation and how it can contribute to jail populations. It will also present an analysis of data from nine cities and counties participating in the John D. and Catherine T. MacArthur Foundation’s Safety and Justice Challenge (SJC), a national initiative that seeks to address over-incarceration by changing the way the  United States thinks about and uses jails. The Vera Institute of Justice (Vera) was able to obtain more detailed jail data from these sites than is available at the national level. This analysis offers examples of how probation affects jail incarceration and the kind of data and analysis that is needed at the national level. Finally, this brief will highlight work being done in two SJC sites—St. Louis County, Missouri, and Allegheny County, Pennsylvania— to reduce the number of people on probation in their jails. This brief is intended both to spur greater consideration of the problem of probation’s contribution to jail populations and to suggest ways to address it.  

New York: Vera Institute of Justice, 2021. 50p.