                                                         [DO NOT PUBLISH]


             IN THE UNITED STATES COURT OF APPEALS
                                                                 FILED
                     FOR THE ELEVENTH CIRCUIT U.S. COURT OF APPEALS
                       ________________________ ELEVENTH CIRCUIT
                                                            Sept. 22, 2009
                             No. 08-15857                 THOMAS K. KAHN
                         Non-Argument Calendar                 CLERK
                       ________________________

                 D. C. Docket Nos. 04-01145-CV-J-20-HTS
                             02-00243-CR-J-2

LUCIOUS LATTIMORE,



                                                          Petitioner-Appellant,

                                  versus

UNITED STATES OF AMERICA,

                                                        Respondent-Appellee.


                       ________________________

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

                           (September 22, 2009)

Before BIRCH, HULL and WILSON, Circuit Judges.

PER CURIAM:
      Lucious Lattimore, through counsel, appeals from the district court’s denial

of his 28 U.S.C. § 2255 motion to vacate, set aside, or correct his sentence. He

argued in the motion that his counsel rendered ineffective assistance at sentencing

by failing to object to an enhancement for obstruction of justice pursuant to U.S.

SENTENCING GUIDELINES MANUAL (“U.S.S.G.”) § 3C1.1. The district court

denied Lattimore’s motion. We granted a certificate of appealability as to

“[w]hether the district court erred in finding that counsel was not ineffective for

failing to object to a two-level enhancement for obstruction of justice, pursuant to

U.S.S.G. § 3C1.1.” We affirm.

      In a 28 U.S.C. § 2255 proceeding collaterally attacking a sentence, we

review the district court’s factual findings for clear error and legal issues de novo.

Lynn v. United States, 365 F.3d 1225, 1232 (11th Cir. 2004) (per curiam). An

ineffective assistance of counsel claim is a mixed question of law and fact subject

to de novo review. Gordon v. United States, 518 F.3d 1291, 1296 (11th Cir. 2008).

To prevail on a claim of ineffective assistance of counsel, the defendant must

demonstrate both (1) that his counsel’s performance was deficient, and (2) that he

suffered prejudice as a result of that deficient performance. Strickland v.

Washington, 466 U.S. 668, 687–88, 104 S. Ct 2052, 2064–67 (1984). We need not

“address both components of the inquiry if the defendant makes an insufficient



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showing on one.” Id. at 697, 104 S. Ct. at 2069.

      “When reviewing the district court’s application of the sentencing

guidelines, we apply the version of the guidelines in effect on the date of the

sentencing hearing.” United States v. Descent, 292 F.3d 703, 707 (11th Cir. 2002)

(per curiam). The 2002 version of U.S.S.G. § 3C1.1, which was in effect when

Lattimore was sentenced, read as follows:

      If (A) the defendant willfully obstructed or impeded, or attempted to
      obstruct or impede, the administration of justice during the course of
      the investigation, prosecution, or sentencing of the instant offense of
      conviction, and (B) the obstructive conduct related to (i) the
      defendant’s offense of conviction and any relevant conduct; or (ii) a
      closely related offense, increase the offense level by 2 levels.

U.S. S ENTENCING G UIDELINES M ANUAL § 3C1.1 (2002).

      The language requiring conduct to “occur during the investigation,

prosecution, or sentencing of the defendant’s offense of conviction” clarified that

obstructive conduct can relate to a closely related case. Id. app. C, amend. 581.

The application notes state that the adjustment should be applied when a defendant

“provid[ed] a materially false statement to a law enforcement officer that

significantly obstructed or impeded the official investigation or prosecution of the

instant offense.” Id. § 3C1.1 cmt. n.4(g). “The commentary and application notes

of the Sentencing Guidelines are authoritative, unless they are plainly erroneous,

inconsistent with the regulation they interpret, or contrary to the Constitution or

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federal law.” United States v. Smith, 568 F.3d 923, 927 n.1 (11th Cir. 2009).

      Lattimore argues that the U.S.S.G § 3C1.1 enhancement, through its

language “during the course of the investigation, prosecution, or sentencing of the

instant offense of conviction,” applies only to obstructive conduct in relation to the

investigation, prosecution, or sentencing of a defendant’s own offense. We

disagree.

      The application notes, along with the Sentencing Commission’s Reason for

Amendment, show that the “during the course of” language was meant to create a

temporal element, prohibiting a defendant from being subject to an enhancement

when his obstructive conduct occurred before the investigation or after sentencing.

See U.S. S ENTENCING G UIDELINES M ANUAL § 3C1.1 cmt. n.1; U.S. S ENTENCING

G UIDELINES M ANUAL app. C, amend. 581. These application notes are

authoritative. See Smith, 568 F.3d at 927 n.1. While Lattimore argues that his

conduct actually occurred during the course of an investigation into a related case,

his obstructive conduct also occurred shortly before his own sentencing hearing

while he was cooperating with the government. Therefore, Lattimore’s argument

that his obstructive conduct did not occur during the course of the investigation,

prosecution, or sentencing of his offense is without merit.

      Lattimore cannot show that counsel rendered deficient performance by



                                           4
failing to object to the enhancement. Because he cannot do so, we do not address

whether counsel’s performance was prejudicial.

      AFFIRMED.




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