Legal Question in Wills and Trusts in Illinois

You probably don't have any legal duties with respect to your son's estate. If I understand properly, your son was single on the date of his death. If he didn't leave a will, his property will go to his children in equal shares. If they are minors, there may need to be a court proceeding to identify who will manage the resources for them, and perhaps a court proceeding to establish where they will live. If your son had any life insurance, or retirement assets, these will go to the beneficiaries he designated in writing. If you are worried about your grandchildren's welfare, I recommend you talk to an attorney near you as soon as possible.