§5G1.3. Imposition of a Sentence on a Defendant Subject to an Undischarged Term of Imprisonment or Anticipated State Term of Imprisonment
Former §5G1.3, comment. (n.4(E)) (Downward departure relating to certain cases involving an undischarged term of imprisonment):
Unlike subsection (b), subsection (d) does not authorize an adjustment of the sentence for the instant offense for a period of imprisonment already served on the undischarged term of imprisonment. However, in an extraordinary case involving an undischarged term of imprisonment under subsection (d), it may be appropriate for the court to downwardly depart. This may occur, for example, in a case in which the defendant has served a very substantial period of imprisonment on an undischarged term of imprisonment that resulted from conduct only partially within the relevant conduct for the instant offense. In such a case, a downward departure may be warranted to ensure that the combined punishment is not increased unduly by the fortuity and timing of separate prosecutions and sentencings. Nevertheless, it is intended that a departure pursuant to this application note result in a sentence that ensures a reasonable incremental punishment for the instant offense of conviction.
To avoid confusion with the Bureau of Prisons’ exclusive authority provided under 18 U.S.C. § 3585(b) to grant credit for time served under certain circumstances, the Commission recommends that any downward departure under this application note be clearly stated on the Judgment in a Criminal Case Order as a downward departure pursuant to §5G1.3(d), rather than as a credit for time served.
Former §5G1.3, comment. (n.5) (Downward departure relating to cases involving a discharged term of imprisonment):
In the case of a discharged term of imprisonment, a downward departure is not prohibited if the defendant (A) has completed serving a term of imprisonment; and (B) subsection (b) would have provided an adjustment had that completed term of imprisonment been undischarged at the time of sentencing for the instant offense. See §5K2.23 (Discharged Terms of Imprisonment).