The fact that our assessment of current trends in juvenile offending is based largely on arrest data reported to the Federal Bureau of Investigation (FBI) by local law enforcement agencies raises a fundamental question about the capacity of such data to provide an accurate and comprehensive picture of the myriad challenges that face today's youth and our society.

The information that this Bulletin offers on trends in juvenile violent offending over the past two decades, however, comes from a different source: the victims of those offenses.

Thus, unlike the data derived from the FBI's Uniform Crime Reports, which drive traditional assessments, the information provided by the National Crime Victimization Survey—and featured in these pages—is not limited to cases that come to the attention of local law enforcement officials, primarily through arrests.

By comparing the pictures of trends in juvenile violent offending that these diverse data sources provide, we can begin to answer the critical question posed above and to determine whether our present understanding of juvenile offending accurately reflects the nature of those crimes—and not merely the nature of its origins.

Accordingly, it is our hope that examining information from a variety of sources about a variety of activities related to juvenile offending will better equip us to prevent and combat such delinquent acts.