Provides answers to the most frequently asked questions about trends in youth violence and victimization, drawing mainly from new analyses of national statistics series, as well as recent research studies. Of special interest are county level maps depicting the distribution of juvenile homicide victims and perpetrators, illustrating the concentration of such crimes in a small percentage of localities. In addition, an analysis of the court careers of 16 groups of offenders whose members turned 18 years old between 1980 and 1995 provides valuable insight into long-term trends in serious, violent, and chronic delinquency. Charts and tables.