Funded by the National Institute of Justice, this data collection represents Phase II of a larger project to evaluate pretrial release practices. The study focuses on four major topics: (1) release--rates and types of releases, defendant or case characteristics and their impact on the release decision, (2) court appearance --extent to which released defendants appear in court, factors associated with defendants' failure to appear in court, (3) pretrial criminality--number of rearrests during the pretrial period and the factors predicting rearrest, charges and rates of conviction for crimes committed during the pretrial period, and (4) impact of pretrial release programs--effect of programs on release decisions and on the behavior of defendants. The study is limited to adult defendants processed through state and local trial courts, and to pretrial release rather than pretrial intervention or diversion programs. Part 1 is an analysis of release practices and outcomes in eight jurisdictions (Baltimore City and Baltimore County, Maryland, Washington, DC, Dade County, Florida, Jefferson County, Kentucky, Pima County, Arizona, Santa Cruz County, California, and Santa Clara County, California). The pretrial release "delivery systems," that is, the major steps and individuals and organizations in the pretrial release process, were analyzed in each jurisdiction. Additionally, a sample of defendants from each site was studied from point of arrest to final case disposition and sentencing. Part 2 of this study examines the impact of the existence of pretrial release programs on release, court appearance, and pretrial release outcomes. An experimental design was used to compare a group of defendants who participated in a pretrial release program with a control group who did not. Experiments were conducted in Pima County (Tucson), Arizona, Baltimore City, Maryland, Lincoln, Nebraska, and Jefferson County (Beaumont-Port Arthur), Texas. In Tucson, separate experiments were conducted for felony and misdemeanor cases.