The National Alliance of Gang Investigators' Associations is a cooperative non-profit organization composed of criminal justice and professional organizations that represent gang investigators; associations with a membership of approximately 20,000 gang investigators across North America. NAGIA also has advisory representation from federal agencies and other entities involved in gang prevention, intelligence, enforcement and suppression initiatives.
NAGIA provides international leadership in developing and recommending strategies to prevent and control gang crime., establishing standards for professional anti-gang training, establishing uniform gang definitions, and assisting criminal justice professionals and the public in identifying emerging gang problems and gang crimes, and also provides input to policymakers and program administrators throughout the United States and abroad.