Originally Posted by
Often1
3. If you are a USN, you will be detained pending notification of the agency which holds the warrant. Depending on the seriousness of the misdemeanor, the relative distances and local policies, they may or may not pursue you. If they do, you will be held by CBP as a courtesy pending the arrival of the agency holding the warrant. This can take anywhere from hours to a couple of days.
4. If you are not a USN, you will likely be excluded and returned to wherever you're from.