"The National Gang Intelligence Center (NGIC) prepared the 2011 National Gang Threat Assessment (NGTA ) to examine emerging gang trends and threats posed by criminal gangs to communities throughout the United States. The 2011 NGTA enhances and builds on the gang-related trends and criminal threats identified in the 2009 assessment. It supports US Department of Justice strategic objectives 2.2 (to reduce the threat, incidence, and prevalence of violent crime) and 2.4 (to reduce the threat, trafficking, use, and related violence of illegal drugs). The assessment is based on federal, state, local, and tribal law enforcement and corrections agency intelligence, including information and data provided by the National Drug Intelligence Center (NDIC) and the National Gang Center. Additionally, this assessment is supplemented by information retrieved from open source documents and data collected through April 2011."
Federal Bureau of Investigation: http://www.fbi.gov/