"There can be few components of law enforcement programmes which actually cost nothing. The asset forfeiture provision of the federal law for crop suppression (relating mainly to cannabis in the State of Kentucky), proved to be such a case, costing the United States Government $13.7 million, but yielding a return of $53 million in 1991, or almost $4 in assets seized for every $1 invested by the Drug Enforcement Administration."

Source

United Nations International Drug Control Program, "Technical Series Report #6: Economic and Social Consequences of Drug Abuse and Illicit Trafficking" (New York, NY: UNDCP, 1998), p. 38.
http://www.unodc.org/pdf/tech…