Rockville, Md.
(800) 851-3420 or (301) 519-5500
http://www.ncjrs.gov/app/topics/topic.aspx?topicid=122
This service, part of the federal Justice Department, is a clearinghouse for reports and resources. The linked juvenile justice section of its website includes information on gangs, family violence, girls in the criminal justice system and school safety.