New data compiled by the Federal Bureau of Investigation make it clear that the peak hours for violent juvenile crime are 3:00 p.m. to 8:00 p.m. Nearly half of all juvenile crime takes place between 2:00 p.m. and 8:00 p.m., and nearly two-thirds of all violent juvenile crime takes place between 2:00 p.m. and 11:00 p.m. In addition, in 57% of families with children under 18, juveniles lack full-time parental supervision. This report focuses on days when school is in session, the days when after-school programs could have a major impact on youth activity during the prime time juvenile crime hours. If there were quality after-school programs available, crime could be reduced dramatically while students could develop values and skills they need to become good neighbors and responsible adults. After-school programs provide responsible adult supervision, constructive activities, and insulation from harmful peer pressures during high-risk hours. Research has demonstrated the value of after-school programs. Their "safe haven" and control features could have a large crime reduction impact. An appendix summarizes the data on crime occurrence. (Contains four graphs.) (SLD)