18 U.S.C. § 1467 : US Code - Section 1467: Criminal forfeiture

      (a) Property Subject to Criminal Forfeiture. - A person who is
    convicted of an offense involving obscene material under this
    chapter shall forfeit to the United States such person's interest
    in - 
        (1) any obscene material produced, transported, mailed,
      shipped, or received in violation of this chapter;
        (2) any property, real or personal, constituting or traceable
      to gross profits or other proceeds obtained from such offense;
        (3) any property, real or personal, used or intended to be used
      to commit or to promote the commission of such offense.

      (b) The provisions of section 413 of the Controlled Substances
    Act (21 U.S.C. 853), with the exception of subsections (a) and (d),
    shall apply to the criminal forfeiture of property pursuant to
    subsection (a).
      (c) Any property subject to forfeiture pursuant to subsection (a)
    may be forfeited to the United States in a civil case in accordance
    with the procedures set forth in chapter 46 of this title.