http://www.nlectc.org/links/ganglinks.html
http://www.nmgtf.org/ The mission of the National Major Gang Task Force is to display leadership in linking all 50 states correctional systems, the Federal Bureau of Prisons, major jails, law enforcement and probation and parole offices throughout the country. This will be accomplished by the developed of a National Correction Informational Sharing System.
http://virlib.ncjrs.org/juv.asp?category=47&subcategory=66
The Feds give block grants (BIG $$$) to the States to promote community policing. I think locals know how to effectively deal with local problems.