The goal of the GVRP was to achieve a significant absolute or relative decrease in the level of serious gang violence committed by 100 targeted gang members, as well as a reduction of serious gang violence in Little Village compared with 6 other similar Chicago communities. At least 50 of these gang youth were to receive intensive, collaborative services and supervision from the project team and associated community-based agencies and grass-roots groups. The Project Model called for a team approach that used interrelated strategies to address the gang problem; these included local community mobilization, social intervention, provision of social opportunities, suppression, and organizational change and development of local agencies and groups. In this final project report, a section on project implementation focuses on the genesis of the project, the beginning of field operations and research planning, organizational change and development, social intervention, suppression, community mobilization, and project transition (crisis, transfer, and termination). The second section of the report addresses project outcomes as determined by a survey of individual gang members, the documentation of program services/contact and effects, the criminal histories of program and comparison groups, the modeling of program effects, aggregate-level changes in gang crime, changes in community perceptions of the gang problem, and community and leadership perceptions of the GVRP. Regarding project implementation, this report concludes that although the project developed an effective collaborative approach among the members of a team of street-level police, probation, and community youth workers during the course of the 5-year project, the project did not adequately organize the local community or gain the full support of the administration of the Chicago Police Department. Regarding project outcomes, it did achieve a significant reduction in certain types of crime among approximately 200 targeted hardcore gang members served by the program. The coordinated approach was effective in reducing serious gang violence and drug crime by individual targeted youth. The strategies of social intervention, provision of social opportunities, and suppression were well implemented and effective in achieving their goals. Community and citywide institutional involvement must be achieved, however, if serious chronic gang problems are to be addressed. The lead agency would have to mobilize and encourage collaborative change in the policies and practices of city and county justice agencies, as well as social, education, and faith-based organizations, along with business and local community groups.