"A Brief Look at Gangs and the Fairbanks Gang Assessment" is the topic of the most recent Justice Center Research Overview. Khristy Parker gives a short summary of national and Alaska gang data related to gang member demographics, motivation for gang membership, and problems caused by gangs.
A more detailed look at this subject is in the Alaska Justice Forum, Winter 2011 issue : "National Data and the Fairbanks Gang Assessment" by Khristy Parker and Shea Daniels, "Legal Definitions of Gang and Gang Crime," "Gang Units in Local Law Enforcement Agencies," and "Further Reading: Gangs."