Don't stress ....he will have to come back to the states sometime!! My son's father said the same thing, until his lawyer advised him, he wouldn't be able to enter the country until arrays are paid in full. Plus US Custom would arrest him at the POE. It would be in his interest to make arrangment with you prior to departure! Many will say there is nothing you can do, don't believe them. It might not be money,but it will be revenge!!
