Analyses of the nature and extent of violent and chronic juvenile crime conclude that such crime is not as widespread as the public perceives it to be, although it is a significant problem in metropolitan areas of the West and East. It is noted that only a small percentage of juveniles commit the violent crimes of murder, rape, and assault, while the greatest problem is the juvenile who chronically commits robberies and burglaries. A profile of the serious juvenile offender is provided, with particular attention given to the undersocialized juvenile, who has not developed the skills or values necessary to live normatively. A number of presentations focus on the phenomenon of youth gangs, including the nature of this problem and organizing to deal with it. Consideration of procedures for identifying the serious juvenile offender focuses on intake procedures used by various juvenile justice systems. The effectiveness of policies of waiving or transfering serious juvenile offenders for adjudication in adult courts is considered, with particular attention to such policies in New York State and Florida. Workshops and addresses also discuss police and prosecutorial responses to the serious juvenile offender, an instrument for predicting high and low risks of recidivism among juvenile offenders which is useful in determining levels of supervision, and the use of probation with serious juvenile offenders. Various community-based treatment programs that have been used with serious juvenile offenders are also considered. For individual tapes, see NCJ 91385-91402.