Customs officer
A customs officer is a law enforcement agent who enforces customs laws, on behalf of a government. ... In the United States, a customs officer is a federal law enforcement officer working to enforce customs laws as well as over 400 laws for other federal agencies. Customs officers enforce these laws for every person or thing that enters or leaves U.S. Among their many functions are detecting and confiscating contraband, making sure that import duties are paid, and preventing those without legal authorization from entering the United States. [Customs officer. Wikipedia]