18 U.S.C. § 3143 : US Code - Section 3143: Release or detention of a defendant pending sentence or appeal

      (a) Release or Detention Pending Sentence. - (1) Except as
    provided in paragraph (2), the judicial officer shall order that a
    person who has been found guilty of an offense and who is awaiting
    imposition or execution of sentence, other than a person for whom
    the applicable guideline promulgated pursuant to 28 U.S.C. 994 does
    not recommend a term of imprisonment, be detained, unless the
    judicial officer finds by clear and convincing evidence that the
    person is not likely to flee or pose a danger to the safety of any
    other person or the community if released under section 3142(b) or
    (c). If the judicial officer makes such a finding, such judicial
    officer shall order the release of the person in accordance with
    section 3142(b) or (c).
      (2) The judicial officer shall order that a person who has been
    found guilty of an offense in a case described in subparagraph (A),
    (B), or (C) of subsection (f)(1) of section 3142 and is awaiting
    imposition or execution of sentence be detained unless - 
        (A)(i) the judicial officer finds there is a substantial
      likelihood that a motion for acquittal or new trial will be
      granted; or
        (ii) an attorney for the Government has recommended that no
      sentence of imprisonment be imposed on the person; and
        (B) the judicial officer finds by clear and convincing evidence
      that the person is not likely to flee or pose a danger to any
      other person or the community.

      (b) Release or Detention Pending Appeal by the Defendant. - (1)
    Except as provided in paragraph (2), the judicial officer shall
    order that a person who has been found guilty of an offense and
    sentenced to a term of imprisonment, and who has filed an appeal or
    a petition for a writ of certiorari, be detained, unless the
    judicial officer finds - 
        (A) by clear and convincing evidence that the person is not
      likely to flee or pose a danger to the safety of any other person
      or the community if released under section 3142(b) or (c) of this
      title; and
        (B) that the appeal is not for the purpose of delay and raises
      a substantial question of law or fact likely to result in - 
          (i) reversal,
          (ii) an order for a new trial,
          (iii) a sentence that does not include a term of
        imprisonment, or
          (iv) a reduced sentence to a term of imprisonment less than
        the total of the time already served plus the expected duration
        of the appeal process.

    If the judicial officer makes such findings, such judicial officer
    shall order the release of the person in accordance with section
    3142(b) or (c) of this title, except that in the circumstance
    described in subparagraph (B)(iv) of this paragraph, the judicial
    officer shall order the detention terminated at the expiration of
    the likely reduced sentence.
      (2) The judicial officer shall order that a person who has been
    found guilty of an offense in a case described in subparagraph (A),
    (B), or (C) of subsection (f)(1) of section 3142 and sentenced to a
    term of imprisonment, and who has filed an appeal or a petition for
    a writ of certiorari, be detained.
      (c) Release or Detention Pending Appeal by the Government. - The
    judicial officer shall treat a defendant in a case in which an
    appeal has been taken by the United States under section 3731 of
    this title, in accordance with section 3142 of this title, unless
    the defendant is otherwise subject to a release or detention order.
    Except as provided in subsection (b) of this section, the judicial
    officer, in a case in which an appeal has been taken by the United
    States under section 3742, shall - 
        (1) if the person has been sentenced to a term of imprisonment,
      order that person detained; and
        (2) in any other circumstance, release or detain the person
      under section 3142.