Go to the clerk of the court's office in the county in which the person lived at the time of death.
Ask the clerk if a will has been filed with the court and if it is available for public viewing. If a will has not been filed, ask if proceedings for intestate succession have commenced.
Read the will, if it is available for public viewing, to determine who the executor of the estate is. The executor is the person responsible for determining what property the deceased had at death. If there is not a will, courts often appoint a personal representative to carry out the same function as an executor. Ask the clerk for the contact information of the executor or personal representative; it will be on file with the court.
Contact the executor and ask for the information you want. If the executor will not tell you, monitor any legal proceedings for filings and hearings that you can view to ascertain the information.