Legal Question in Immigration Law in Virginia

Re: Green Card

Your question is confusing. If you mean that the wife and children got their respective "green cards" through the sponsorship (under family reunification) of her husband(your friend) who in turn got his (card) through the Diversity Lottery, the answer is very likely no, if the lawful permanent residencies(green cards)already have been granted, the husband would have no authority to request that they now be cancelled merely because the wife wants a divorce some three years later. (The foregoing assumes that the parties were already married and a family before coming to the United States.)