This study reports on the implementation in Dade County, Florida, of a proposal to involve, on a voluntary basis, victims, defendants, and police in a judicial plea negotiation conference. The study was supported by a grant from the National Institute of Law Enforcement and Criminal Justice of the Law Enforcement Assistance Administration, United States Department of Justice. Parts 1-3, Defendants, Victims, and Police files, consist of responses to questionnaires given to defendants, victims, and police. The questionnaires were administered during 20-minute interviews, conducted after the case had been completed. The interview instruments were designed to collect data on three major issues: (1) the extent to which respondents reported participation in the processing of their cases, (2) respondents' knowledge of the way their cases were processed, and (3) respondents' attitudes toward the disposition of their cases and toward the criminal justice system. Part 4 is the Conference Data File. During the pretrial settlement conference, an observer wrote down in sequence as much as possible of the verbal behavior. After the session, the observer made some subjective ratings, provided descriptive data about the conclusion of the session, and classified comments into one of the following categories: (1) Facts of the Case, (2) Prior Record, (3) Law and Practices, (4) Maximum Sentence, (5) Prediction of Trial Outcome, (6) Conference Precedent, (7) Personal Background History, and (8) Recommendations. Information in Part 5, the Case Information Data File, was drawn from court records and includes type of case, number of charges, sentence type, sentence severity (stated and perceived), seriousness of offense, date of arrest, date of arraignment, date of conference, prior incarcerations, and defendant background.