Nicky, the police dog (U.S. Customs and Border Protection)

Nicky, the dog, sniffed out there was something suspicious with the traveler.

On Monday, a man traveling from Qatar landed at Washington Dulles International Airport and declared that he had $8,000 to officials with the U.S. Customs and Border Protection Office. But as he left an inspection area, a K9 enforcement officer led his partner — Nicky — over to check things out.

Nicky sniffed and alerted the officer. There was far more cash than the man claimed.

The man was asked how much money he was carrying. He again told the officer, $8,000. The officer asked for another inspection of the man’s luggage. Customs officials discovered he had an envelope with $24,789 inside.

While there is no limit to how much cash travelers can export or import into the U.S., they are required to declare amounts above $10,000 to customs officials.

“Travelers who refuse to comply with federal currency reporting requirements run the risk of having their currency seized, and may potentially face criminal charges,” said Frances B. Garcia, acting port director for Washington with the customs and border protection office, in a statement.

“The traveler was given the opportunity to truthfully report his currency,” she said. “The easiest way to hold on to your money is to report it.”

The money was taken by customs officials. The man was not charged with a crime.

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