So we're to infer that he never sought to adjust his status following his mrriage to his former wife, despite being married to her for five years, and did nothing to try to maintain lawful status after the divorce?
And now he has well over a year's overstay, meaning a ten year period of ineligibility to return to the United States?
There's no easy way to dig him out of this hole. He should consult an immigration lawyer to discuss his limited options.

