The purposes of the U.S. Department of Justice (DOJ) are to
The Department of Justice is divided into many different division and sections. Its website http://www.usdoj.gov may help in locating the division that can best assist you. After accessing this website click on "DOJ Agencies" then click "Criminal Division" then click "Organizations".
One of the more useful divisions for information relating to asset forfeiture and repatriation is the Asset Forfeiture and Money Laundering Section of DOJ.