28 U.S.C. § 2513 : US Code - Section 2513: Unjust conviction and imprisonment

      (a) Any person suing under section 1495 of this title must allege
    and prove that:
        (1) His conviction has been reversed or set aside on the ground
      that he is not guilty of the offense of which he was convicted,
      or on new trial or rehearing he was found not guilty of such
      offense, as appears from the record or certificate of the court
      setting aside or reversing such conviction, or that he has been
      pardoned upon the stated ground of innocence and unjust
      conviction and
        (2) He did not commit any of the acts charged or his acts,
      deeds, or omissions in connection with such charge constituted no
      offense against the United States, or any State, Territory or the
      District of Columbia, and he did not by misconduct or neglect
      cause or bring about his own prosecution.

      (b) Proof of the requisite facts shall be by a certificate of the
    court or pardon wherein such facts are alleged to appear, and other
    evidence thereof shall not be received.
      (c) No pardon or certified copy of a pardon shall be considered
    by the United States Court of Federal Claims unless it contains
    recitals that the pardon was granted after applicant had exhausted
    all recourse to the courts and that the time for any court to
    exercise its jurisdiction had expired.
      (d) The Court may permit the plaintiff to prosecute such action
    in forma pauperis.
      (e) The amount of damages awarded shall not exceed $100,000 for
    each 12-month period of incarceration for any plaintiff who was
    unjustly sentenced to death and $50,000 for each 12-month period of
    incarceration for any other plaintiff.