California Policy Lab

Pretrial electronic monitoring (pretrial EM) is a digital surveillance program that tracks the location and movements of people released to the community while they await the resolution of their criminal case. A locked plastic bracelet is attached to the person’s ankle, which includes a GPS tracking device that notifies the Sheriff’s Office if the person is not complying with the terms of their release. This report covers the characteristics and outcomes of people released by the courts to pretrial EM in San Francisco between 2018 and 2021. During this period, two significant events impacted pretrial detention. First, the In Re Humphrey decision required judges in San Francisco to consider ability to pay when setting bail and to select the least restrictive non-monetary release condition. Second, in response to the COVID-19 pandemic, policymakers issued public health directives limiting the jail population in San Francisco. This report is not an evaluation or causal analysis of the impact of pretrial EM. Rather, this report provides policymakers with data and insights to aid decisions about pretrial EM in San Francisco.

This work has been supported, in part, by the University of California Multicampus Research Programs and Initiatives grants MRP-19-600774 and M21PR3278