TSA..

 

Crossing a border.

Any time you visiting another country with a stop over somewhere, you are required to answer all their questions truthfully.
Each country's border is focusing on certain issues. How much money do you have, proof that it's your money. Your travel ticket, when did you buy it, who paid for it. If someone else, who? why? They need logical answer they will accept.

Some food are not allowed. If you didn't claim it on the paper, they can charge you a penalty over  $4k    

Who gave you something and why? Unacceptable to them and their investigation continue and you going nowhere.
 If you have medicine, who's name, prescription and how much of it.
They are allowed to confiscate any suspension item and you can be prosecuted. 

They have many equipment to test, drugs, food, etc. 

You don't have that much rights at this point.  Just a thought.