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.
The FBI and NGIC recommend contacting state and local law enforcement agencies for more information related to specific gang activity.
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.
In the 2010 NDTS, the key assumption was that individual respondents provided estimates on gang members for their jurisdictions only and did not include other jurisdictions.
A stratified random sample of nearly 3,500 state and local law enforcement agencies was surveyed to generate national, regional, and state estimates of various aspects of drug trafficking activities including the threat posed by various drugs, the availability and production of illicit drugs, as well as the role of street gangs and outlaw motorcycle gangs in drug trafficking activity.This maintains consistency with the 2009 NGTA report’s maps on gang activity.During the years the NGTA is published, many entities—news media, tourism agencies, and other groups with an interest in crime in our nationuse reported figures to compile rankings of cities and counties.The FBI and the NGIC do not recommend that jurisdictions use the estimated gang membership totals as exact counts for the numbers of gang members.These numbers are not used by the FBI or NGIC to rank jurisdictions on gang activity.