On any given day, nearly 450,000 people in the United States—still legally innocent—are detained while awaiting the resolution of their criminal charges, many because they could not afford to pay the bail amount set as a condition of their release. In response, jurisdictions across the United States are making changes to their pretrial systems to reduce the number of people who are held in pretrial detention. As part of this effort, many jurisdictions are moving away from money bail as a primary means of encouraging people to return for future court dates. Instead, they are increasingly relying on strategies such as pretrial supervision, which requires released people to meet regularly with supervision staff members, and special conditions, such as electronic monitoring and sobriety monitoring.

In theory, the added layer of oversight that these release conditions provide would encourage people to appear for court dates and avoid new arrests. Yet until the last two years, research on the effectiveness of these conditions was either limited (in the case of pretrial supervision) or had faced methodological limitations and yielded mixed findings (in the case of special conditions). A more rigorous understanding of the effectiveness of these release conditions is critical, particularly given their immense burdens and costs to both jurisdictions and people awaiting the resolution of their criminal charges.

This brief synthesizes findings from three recent impact studies that assessed the effectiveness of varying intensities and modes of pretrial supervision, as well as electronic monitoring and sobriety monitoring, at ensuring court appearances and preventing new arrests. Among the most rigorous evaluations of pretrial monitoring conducted to date, these studies were set across five geographically diverse U.S. jurisdictions. Findings from each of the three studies are presented in the sections below, followed by a discussion of overarching policy and practice implications. In sum, these analyses suggest that more restrictive levels and modes of pretrial supervision and special conditions do not improve the rates at which clients appear in court or avoid arrest, at least among those assessed as having a low to moderate probability of pretrial noncompliance (that is, failing to appear in court or being rearrested during the pretrial period). Jurisdictions should consider reducing their reliance on these release conditions and instead seek less restrictive requirements to support pretrial compliance among this population.