You haven't told us what type of visa he had. For example, if he entered on a J1 visa subject to the two year home residency rule, he can't adjust his status unless he gets the home residency requirement waived.
You haven't told us what type of visa he had. For example, if he entered on a J1 visa subject to the two year home residency rule, he can't adjust his status unless he gets the home residency requirement waived.