Guarda su Altadefinizione. Every day in the United States, law enforcement agencies at the local, state, and federal levels—including the FBI and DEA—use investigative resources to target the supply side in the war against drugs. But, even with numerous law enforcement successes in this area, the demand for drugs continues. And, one of the more worrisome trends is a growing epidemic of prescription opiate and heroin abuse, especially among young people.