18 U.S.C. § 1581 : US Code - Section 1581: Peonage; obstructing enforcement

      (a) Whoever holds or returns any person to a condition of
    peonage, or arrests any person with the intent of placing him in or
    returning him to a condition of peonage, shall be fined under this
    title or imprisoned not more than 20 years, or both. If death
    results from the violation of this section, or if the violation
    includes kidnapping or an attempt to kidnap, aggravated sexual
    abuse or the attempt to commit aggravated sexual abuse, or an
    attempt to kill, the defendant shall be fined under this title or
    imprisoned for any term of years or life, or both.
      (b) Whoever obstructs, or attempts to obstruct, or in any way
    interferes with or prevents the enforcement of this section, shall
    be liable to the penalties prescribed in subsection (a).