Originally Posted by
Often1
It depends.
If it is something minor and not worth prosecuting, a quick call to the US Attorney and the individual is simply denied entry and shipped back. If it something serious, they are processed privately and then head off for their appearance.
Wouldn't this make it very difficult for them to get a visa or enter the USA ever again? That would be tough for anyone expected to make business trips to the USA or even to places where it might be logical to connect through the USA.