U.S. Customs Service http://www.customs.ustreas.gov/
This is the primary enforcement agency protecting the Nation's borders. It is the only border agency with an extensive air, land, and marine interdiction force and with an investigative component supported by its own intelligence branch.
Seizures and Penalties
A detailed chart that compares drug enforcement, money laundering and drug trafficking policies in various international governments.
Federal Bureau of Investigation (FBI) http://www.fbi.gov/
The Mission of the FBI is to uphold the law through investigation of violations of federal criminal law, protecting the United States from foreign intelligence and terrorist activities.
FBI's Asset Forfeiture Unit http://www.fbi.gov/hq/cid/asset/asset.htm
Gives a general overview of asset forfeiture, and links to more information on white-collar crime investigations and asset forfeiture and the law.