Independent married student now divorced

I thought he already filed a FAFSA for 2016/17 and attended school in Fall of 2016. The same FAFSA counts for Spring of 2017. I think the son was trying to get professional judgment because he was married when he filed the FAFSA, and reported joint income. But now that he is transferring to another school, he is divorced and wants only his income to count?
But since he is now dependent again, he is just trading the wife’s income for the parents’ on the 2017/18 FAFSA.