It turns out his fare was Daniele Perazzi, president of an Italian shotgun manufacturer. As you might expect, such a man has lawyers and was released in short order, though reports are that law enforcement ordered him out of the state. If true, there doesn't seem to be any legal basis for the order.
This is of course an embarrassment for our country, which is supposed to be free.
UPDATE: It seems there's some doubt about this story.