18 U.S.C. § 548

Whoever fraudulently conceals, removes, or repacks merchandise in any bonded warehouse or fraudulently alters, defaces or obliterates any marks or numbers placed upon packages deposited in such warehouse, shall be fined under this title or imprisoned not more than two years, or both. Merchandise so concealed, removed, or repacked, or packages upon which any marks or numbers have been so altered, defaced, or obliterated, shall be forfeited to the United States.