                                                         [DO NOT PUBLISH]

             IN THE UNITED STATES COURT OF APPEALS

                    FOR THE ELEVENTH CIRCUIT
                      ________________________                   FILED
                                                        U.S. COURT OF APPEALS
                                                          ELEVENTH CIRCUIT
                             No. 05-13352
                                                               May 15, 2006
                         Non-Argument Calendar             THOMAS K. KAHN
                       ________________________                CLERK

                   D. C. Docket No. 04-22110-CV-MGC

PEDRO CASTILLO,



                                                          Petitioner-Appellant,

                                  versus

LOREN GRAVER, Warden, FCI,
Miami, Florida, Federal Bureau
of Prisons,
FEDERAL BUREAU OF PRISONS,


                                                      Respondents-Appellees.

                       ________________________

                Appeal from the United States District Court
                    for the Southern District of Florida
                      _________________________

                              (May 15, 2006)

Before TJOFLAT, HULL and WILSON, Circuit Judges.

PER CURIAM:
      Federal prisoner Pedro Castillo, proceeding pro se, appeals the district

court’s denial of his 28 U.S.C. § 2241 petition for writ of habeas corpus, seeking

credit for time he served between his indictment and sentencing while he was

imprisoned for another offense. Castillo filed his petition after the effective date of

the Antiterrorism and Effective Death Penalty Act of 1996 (“AEDPA”), Pub. L.

No. 104-132, 110 Stat. 1214 (1996); the provisions of that act govern this appeal.

      On October 13, 1999, Castillo was sentenced to 87 months’ imprisonment

(“the 87-month sentence”) after pleading guilty to a drug offense. Unrelated to this

drug offense and while he was in custody, Castillo was indicted on October 12,

1999, for drug and firearms offenses. Castillo pled guilty to these offenses and

was sentenced on December 2, 2002, to 60 months’ imprisonment for the drug

offenses, to run concurrently with the conspiracy sentence (“the 60-month

concurrent sentence”), and to 60 months’ imprisonment for the firearm offense, to

run consecutively to the aggregated 87-month and 60-month concurrent sentences

(“the 60-month consecutive sentence”). Thereafter, the Bureau of Prisons (“BOP”)

aggregated the remainder of Castillo’s 87-month sentence with the 60-month

concurrent sentence into a single term of imprisonment with a full-term release

date of December 1, 2007. The BOP then gave Castillo 382 days of good conduct

time credit and 484 days of credit for time served between his arrest on June 16,



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1998, and October 12, 1999 (the day before the 87-month sentence commenced),

for a projected release date of July 18, 2005. The BOP then added the 60-month

consecutive sentence which, after an additional 235 days of good conduct time

credit, yielded an overall projected release date of November 21, 2009.

      Castillo argues that, at his sentencing for the drug and firearm offences, the

district court’s statement that he “shall receive credit for time served since the case

began” required the BOP to run his 60-month concurrent sentence from October

12, 1999, the date he was indicted for the drug and firearms offenses. Castillo

relies on Section 5G1.3(c) of the United States Sentencing Guidelines Manual

(“U.S.S.G.”), as well as the Third Circuit case Ruggiano v. Reish, 307 F.3d 121,

128 (3d Cir. 2002), for the proposition that a concurrent sentence must be run

“fully or retroactively concurrently.” Castillo argues that any other result would

unfairly penalize him for the delay between his indictment and his sentencing,

which was not his fault. Finally, Castillo asserts that the district court can

alternatively grant him the appropriate credit towards his prison sentence by

remanding his case for consideration of a downward departure pursuant to

U.S.S.G. § 5K2.0.

      In reviewing the denial of a habeas petition, we review the district court’s

factual findings for clear error and review de novo the court’s statutory



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interpretation. Rodriguez v. Lamer, 60 F.3d 745, 747 (11th Cir. 1995).

      We find meritless Castillo’s argument that the BOP was required to run

“fully and retroactively concurrently” the 60-month concurrent drug sentence with

the 87-month sentence. First, Section 5G1.3(c) states that a sentence “may be

imposed to run concurrently, partially concurrently, or consecutively to the prior

undischarged term of imprisonment,” which is not a mandate. U.S.S.G. § 5G1.3(c)

(emphasis added). Second, Ruggiano, a non-binding Third Circuit case, uses the

phrase “fully and retroactively concurrently” in interpreting Section 5G1.3(b),

which requires the two sentences to arise from the same incident. Castillo’s

sentences were unrelated. Finally, the district court sentencing Castillo to the 60-

month concurrent and consecutive sentences had no authority to bind the BOP in

stating that Castillo “shall receive credit for time served since the case began.”

District courts are not authorized to compute a presentence credit at sentencing.

United States v. Wilson, 503 U.S. 329, 334, 112 S. Ct. 1351, 1354, 117 L. Ed. 2d

593 (1992). Indeed, Castillo quotes only partially the district court’s statement,

which continues, “but the [BOP] decides how to give it to you, and most likely

they won’t give you credit for that.” The computation of credit for a sentence is

the responsibility of the Attorney General, who has delegated it to the BOP. Id. at

335, 112 S. Ct. at 1355.



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      Section 3585(b) of Title 18 of the United States Code provides that:

      A defendant shall be given credit toward the service of a term of
      imprisonment for any time he has spent in official detention prior to
      the date the sentence commences– (1) as a result of the offense for
      which the sentence was imposed; or (2) as a result of any other charge
      for which the defendant was arrested after the commission of the
      offense for which the sentence was imposed; that has not been
      credited against another sentence.

18 U.S.C. § 3585(b). Having reviewed the sentence calculation, we find that the

BOP’s calculation accords with the statute’s requirements.

      Castillo also filed a “Motion to Preserve Issue And/Or Be Remanded for

Unconstitutional Sentence” arguing that this sentence is unconstitutional under

United States v. Booker, 543 U.S. 220, 125 S. Ct. 738, 160 L. Ed. 2d 621 (2005).

Because he did not raise this issue in his petition to the district court, we will not

consider it on appeal. See Walker v. Jones, 10 F.3d 1569, 1572 (11th Cir. 1994)

(“[A]n issue not raised in the district court and raised for the first time in an appeal

will not be considered by this court.”). Accordingly, we deny his motion.

      In sum, the district court did not err in denying Castillo’s petition because he

was not entitled to double credit for time already served and credited against his

87-month sentence. Likewise, the district court did not err in refusing Castillo’s

alternative suggestion that it simply grant him a downward departure under

U.S.S.G. § 5K2.0 because courts are prohibited from modifying already imposed



                                            5
terms of imprisonment unless the modification falls within a statutory exception.

18 U.S.C. § 3582(c). The district court’s judgment is affirmed, and the motion to

preserve is denied.

      AFFIRMED. MOTION DENIED.




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