"The US is not a Market for Stolen Artefacts"

In a statement, the United States attorney in Manhattan, Preet Bharara, said, [...] “The United States is not a market for antiquities stolen from other nations [...] and we will continue to track down and return any that are brought here illegally.”

That's track down the artefacts, not the culture criminals that peddle them.

Source: Tom Mashberg and Ralph Blumental, 'Disputed Statue to Be Returned to Cambodia', New York Times December 12, 2013