"The state of Illinois, specifically the Chicago area, is the focal point for the flow of illicit drugs into the Great Lakes Region. Chicago is the major hub for the delivery and transshipment of drugs throughout the Great Lakes Region and the Midwest. Three major types of trafficking groups are responsible for most of the drugs in Illinois. Mexican polydrug organizations, Colombian drug organizations trafficking in cocaine and heroin, and Nigerian groups trafficking in Southeast Asian heroin are the major transporters and wholesale distributors of drugs in Chicago. The most common means traffickers use to transport drugs into Chicago are commercial trucks, passenger vehicles, package delivery services, air packages or couriers, and railways. Organized street gangs such as the Gangster Disciples, Vice Lords, and Latin Kings control the distribution and retail sale of cocaine, heroin, and marijuana. Violent crime associated with street gangs, while declining in some major urban areas, is increasing in suburban and rural areas of the state as these gangs expand their drug markets. Drugs are readily available throughout the state; however, the nature of the drug threat in Illinois varies by region."
NDIC State Drug Threat Assessments: