he did not declare all of it..
>>>he did not declare all of it<<<
From Airsafe.com:
Travel within the United States
If you are on a domestic flight in the US, there is no limit to the amount of cash or monetary instruments that you can carry. However, the TSA may ask a passenger who is carrying a large sum of cash to account for the money. If the TSA suspects that the money is related to some kind of criminal activity such as drug trafficking or money laundering, they may turn the issue over to a law enforcement agency (TSA has no law enforcement powers).
Always watch out for the word “however”...