United States v. David Olofson ( 2009 )


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  •                            In the
    United States Court of Appeals
    For the Seventh Circuit
    No. 08-2294
    U NITED S TATES OF A MERICA,
    Plaintiff-Appellee,
    v.
    D AVID O LOFSON,
    Defendant-Appellant.
    Appeal from the United States District Court
    for the Eastern District of Wisconsin.
    No. 06 CR 320—Charles N. Clevert, Jr., Judge.
    A RGUED JANUARY 22, 2009—D ECIDED M AY 1, 2009
    Before M ANION and K ANNE, Circuit Judges, and
    K ENDALL, District Judge. Œ
    M ANION, Circuit Judge. David Olofson was indicted for
    knowingly transferring a machinegun in violation of 
    18 U.S.C. § 922
    (o). A jury convicted Olofson of the charged
    offense following a two-day trial, and the district court
    Œ
    Hon. Virginia M. Kendall, District Judge for the Northern
    District of Illinois, is sitting by designation.
    2                                               No. 08-2294
    sentenced him to thirty months’ imprisonment. Olofson
    appeals his conviction. For the following reasons, we
    affirm.
    I. Background
    Robert Kiernicki saw a “for sale” advertisement for a
    Colt AR-15 rifle that David Olofson had posted at a gas
    station in New Berlin, Wisconsin. Kiernicki called Olofson
    at the phone number listed on the ad to inquire about
    the weapon. Olofson informed Kiernicki that the adver-
    tised gun was no longer available but agreed to order
    and assemble another Colt AR-15 for Kiernicki. In the
    meantime, Olofson loaned Kiernicki an AR-151 and hun-
    dreds of rounds of ammunition on four separate occa-
    sions. The selector switch on the borrowed AR-15 had
    three positions: one marked “fire,” one marked “safety,”
    and one that was unmarked. Olofson and Kiernicki dis-
    cussed the unmarked setting on July 13, 2006, which
    was the fourth time that Olofson loaned Kiernicki the
    weapon. Olofson told Kiernicki that putting the selector
    switch in the unmarked position would enable the AR-15
    to fire a three-round burst with a single pull of the
    trigger, but the gun would then jam.
    While at a shooting range that same day, Kiernicki (for
    the first time since using the gun) switched the AR-15 to
    1
    Four of the AR-15’s fire control components were parts from
    M-16 rifles: the trigger, hammer, disconnector, and selector
    switch.
    No. 08-2294                                              3
    the unmarked position and pulled the trigger; three or
    four rounds were discharged before the gun jammed.
    Kiernicki fired the weapon in that fashion several times,
    and each time it jammed after a short burst of three or
    four rounds. Police received a telephone complaint of
    automatic gunfire at the shooting range. When officers
    arrived at the range, they confiscated the AR-15 from
    Kiernicki. Kiernicki told the police that he had borrowed
    the gun from Olofson. Several days later, agents from
    the Bureau of Alcohol, Tobacco, Firearms and Explosives
    (“ATF”) interviewed Olofson while executing a search
    warrant at his home. During that conversation, Olofson
    acknowledged loaning the AR-15 to Kiernicki.
    On December 5, 2006, a grand jury indicted Olofson
    for knowingly transferring a machinegun in violation of
    
    18 U.S.C. § 922
    (o). Shortly before trial, Olofson filed a
    motion to compel the government to disclose evidence
    of the ATF’s firearms testing procedures, correspondence
    between the ATF and the manufacturer of Olofson’s AR-
    15 about the use of M-16 parts in AR-15 rifles, and the
    ATF’s registration history of AR-15 rifles that contain M-
    16 parts. The district court denied that motion on the
    first day of trial after concluding that the information
    the defendant was seeking was not exculpatory under
    Brady v. Maryland, 
    373 U.S. 83
     (1963).
    At trial, the government asked the district court to
    exclude Olofson’s expert witness from the courtroom
    during the testimony of its firearms expert. Over Olofson’s
    objection, the court granted the government’s request.
    The government’s expert testified that he used military-
    4                                             No. 08-2294
    grade ammunition the first time he test-fired the AR-15
    with the selector switch in the unmarked position and that
    the gun fired only one round. Later, using civilian-grade
    ammunition, he conducted two more test-fires of the
    weapon in the unmarked mode. In one of those tests, he
    held the trigger down and the gun fired all of its ammuni-
    tion (twenty rounds) before stopping. He also emptied
    two twenty-round magazines in five- or ten-round bursts
    by depressing, holding, and releasing the trigger several
    times. The government’s expert stated that such firing
    capabilities did not result from a “hammer-follow” mal-
    function but rather were intended features of the gun.
    After the close of the evidence, the court used the
    definition of a “machinegun” from 
    26 U.S.C. § 5845
    (b) to
    instruct the jury and chose not to define the word “auto-
    matically” from that statute as the defendant had re-
    quested. Following deliberation, the jury returned a
    guilty verdict. Olofson then moved for a judgment of
    acquittal, arguing that the evidence presented at trial
    was insufficient to convict him of the charged offense
    and that the statutes under which he was prosecuted are
    unconstitutionally vague. The district court denied that
    motion and sentenced Olofson to thirty months in prison.
    Olofson appeals, challenging his conviction on five
    grounds.
    II. Discussion
    A. Olofson’s Proposed Jury Instruction
    Title 
    18 U.S.C. § 922
    (o)(1) provides that, subject to
    exceptions not relevant here, “it shall be unlawful for
    No. 08-2294                                                   5
    any person to transfer or possess a machinegun.” The
    applicable definition 2 of a “machinegun” is
    any weapon which shoots, is designed to shoot, or can be
    readily restored to shoot, automatically more than one shot,
    without manual reloading, by a single function of the
    trigger. The term shall also include the frame or re-
    ceiver of any such weapon, any part designed and
    intended solely and exclusively, or combination of
    parts designed and intended, for use in converting a
    weapon into a machinegun, and any combination
    of parts from which a machinegun can be assembled
    if such parts are in the possession or under the
    control of a person.
    
    26 U.S.C. § 5845
    (b) (emphasis added). The district court
    instructed the jury using the first sentence of § 5845(b)
    but did not give any guidance on the meaning of the
    word “automatically.” Olofson contends that the court
    inaccurately stated the law when it did not instruct the
    jury using the definition of “automatically” that derives
    from Staples v. United States, 
    511 U.S. 600
    , 602 n.1 (1994),
    and that we allegedly adopted in United States v.
    Fleischli, 
    305 F.3d 643
    , 655 (7th Cir. 2002).3 Whether jury
    2
    According to 
    18 U.S.C. § 921
    (a)(23), “[a]s used in this chap-
    ter[,] [t]he term ‘machinegun’ has the meaning given such term
    in section 5845(b) of the National Firearms Act (26 U.S.C.
    [§] 5845(b)).”
    3
    The defendant contends that if that instruction had been
    given, the jury could have found him not guilty because a
    (continued...)
    6                                               No. 08-2294
    instructions correctly state the law is a matter we review
    de novo. United States v. Thornton, 
    539 F.3d 741
    , 745 (7th
    Cir. 2008). We will reverse only if the instructions
    viewed as a whole misled the jury to the defendant’s
    prejudice. 
    Id.
    In Staples, the defendant was convicted of possession
    of an unregistered machinegun. 
    511 U.S. at 603-04
    . At
    trial, the defendant insisted that he did not know that
    the weapon was capable of firing automatically (which
    is one of the features of a “machinegun” under § 5845(b))
    and requested a jury instruction that the government
    must prove beyond a reasonable doubt that he knew the
    gun could fire in such a manner. Id. The district court
    refused to give the defendant’s proposed instruction;
    instead, it gave an instruction that discounted the defen-
    dant’s need for knowledge of every characteristic of the
    weapon that made it subject to regulation. Id. at 604. The
    Tenth Circuit affirmed, holding that “the Government
    need not prove a defendant’s knowledge of a weapon’s
    physical properties to obtain a conviction.” Id. In
    reversing, the Supreme Court held that the govern-
    ment was required to prove that the defendant knew of
    the characteristics of the gun that brought it within
    the ambit of the statute. Id. at 619.
    At the beginning of its opinion, the Court quoted the
    statutory definition of “machinegun” from § 5845(b) and
    3
    (...continued)
    malfunction was the reason the weapon stopped firing or,
    alternatively, was what caused the gun to fire more than one
    round with a single trigger pull.
    No. 08-2294                                                    7
    stated that “any fully automatic weapon is a ‘firearm’
    within the meaning of the Act.” Id. at 602. In a footnote,
    the Court then said the following:
    As used here, the terms “automatic” and “fully auto-
    matic” refer to a weapon that fires repeatedly with a
    single pull of the trigger. That is, once its trigger is
    depressed, the weapon will automatically continue to fire
    until its trigger is released or the ammunition is exhausted.
    Such weapons are “machineguns” within the
    meaning of the Act.
    Id. at n.1 (emphasis added).
    The narrow holding from Staples is that mens rea was
    an element of the crime in question—i.e., that the gov-
    ernment had to prove the defendant’s knowledge of the
    features of the weapon (including automatic firing cap-
    ability) that brought it within the proscriptive purview of
    the statute. Id. at 619. The precise definition of “automati-
    cally” was not at issue; therefore, the Court’s discussion of
    the terms “automatic” and “fully automatic” was immate-
    rial to its holding. Indeed, the Court prefaced its explana-
    tion of the terms “automatic” and “fully automatic” with
    the phrase “[a]s used here.” Thus, rather than interpreting
    a statute, the Court simply was providing a glossary
    for terms frequently appearing in the opinion. Therefore,
    Staples did not establish a requirement for district courts
    to instruct juries on the meaning of “automatically” from
    § 5845(b).
    The same is true of our decision in Fleischli. In that case,
    the defendant was convicted of two counts of possession
    8                                               No. 08-2294
    of machineguns in violation of 
    18 U.S.C. § 922
    (o)(1).
    Fleischli, 
    305 F.3d at 647
    . The defendant argued that a
    certain weapon was not a machinegun under § 5845(b)
    because it did not fire automatically and did not have a
    trigger. Id. at 654. Fleischli relied upon the definition of
    a semiautomatic rifle from 
    18 U.S.C. § 921
    (a)(28) to assert
    that a gun does not fire automatically “unless it uses a
    portion of the energy of a firing cartridge to extract the
    fired cartridge and chamber the next round without a
    separate pull of the trigger.” 
    Id. at 655
    . This court con-
    cluded that the gun’s electronic on/off switch that
    initiated the firing sequence was a trigger and, having
    quoted from footnote one in Staples, stated that if the
    gun continued to fire until that switch was turned off
    or until the ammunition was exhausted, it was a
    machinegun. 
    Id. at 655-56
    .
    Olofson suggests that Fleischli obliged the district court
    to give his proffered instruction. True, in Fleischli we
    did borrow terminology from Staples in order to stamp
    out the appellant’s “disingenuous argument”; 
    id. at 655
    ;
    however, we never purported to be setting forth a com-
    prehensive definition of “automatically” from § 5845(b).
    Indeed, we described the Staples footnote as merely
    “offer[ing] commonsense explanations” of the words
    “automatic” and “semiautomatic,” which confirms that
    we did not consider that passage to be precedentially
    binding. As we explain below, a weapon does not have
    to continue to fire until its trigger is released or its am-
    munition is exhausted in order to qualify as a
    “machinegun” under § 5845(b). Therefore, Olofson’s
    reliance on Fleischli for that proposition is misplaced.
    No. 08-2294                                                9
    We turn now to address what the word “automatically”
    means as it is used in the definition of “machinegun” in
    § 5845(b). “Statutory interpretation begins with the
    plain language of the statute.” United States v. Berkos, 
    543 F.3d 392
    , 396 (7th Cir. 2008). We assume that the
    purpose of the statute is communicated by the ordinary
    meaning of the words Congress used; therefore, absent
    any clear indication of a contrary purpose, the plain
    language is conclusive. 
    Id.
    Again, “[t]he term ‘machinegun’ means any weapon
    which shoots, is designed to shoot, or can be readily
    restored to shoot, automatically more than one shot,
    without manual reloading, by a single function of the
    trigger.” 
    26 U.S.C. § 5845
    (b). “The most relevant time
    for determining a statutory term’s meaning” is the year
    of the provision’s enactment. MCI Telecomms. Corp. v. Am.
    Tel. & Tel. Co., 
    512 U.S. 218
    , 228 (1994) (citing Perrin v.
    United States, 
    444 U.S. 37
    , 42-45 (1979)). Therefore, we
    examine how “automatically” was commonly used and
    understood in 1934, the year in which the definition of
    “machinegun” became law with the passage of the Na-
    tional Firearms Act, Pub. L. 73-474, 
    48 Stat. 1236
    . A
    leading dictionary from 1934 tells us that “automatically”
    is the adverbial form of “automatic.” W EBSTER’S
    N EW INTERNATIONAL D ICTIONARY 187 (2d ed. 1934). The
    adjectival form of “automatic” is relevantly defined by
    that dictionary as “[h]aving a self-acting or self-
    regulating mechanism that performs a required act at a
    predetermined point in an operation[.]” 
    Id.
     Another
    contemporaneous dictionary similarly describes “auto-
    matic” as “[s]elf-acting under conditions fixed for it, going
    10                                                 No. 08-2294
    of itself.” O XFORD E NGLISH D ICTIONARY 574 (1933).4 Thus
    defined, in § 5845(b) the adverb “automatically,” as it
    modifies the verb “shoots,” 5 delineates how the dis-
    charge of multiple rounds from a weapon occurs: as the
    result of a self-acting mechanism. That mechanism is one
    that is set in motion by a single function of the trigger
    and is accomplished without manual reloading.
    That interpretation clearly forecloses the argument that
    a weapon is not a machinegun merely because it stopped
    firing due to a malfunction; indeed, the reason a weapon
    ceased firing is not a matter with which § 5845(b) is
    concerned. Under that interpretation, however, a defen-
    dant can still argue that the reason a gun fired more than
    one round (with a single pull of the trigger without
    manual reloading) was due to a malfunction—i.e., the
    additional rounds fired resulted from a mishap rather
    than from a regular self-acting mechanism.
    In light of the foregoing interpretation, we conclude
    that Olofson’s proffered instruction was not an accurate
    statement of the law and that the district court properly
    rejected it. Moreover, the district court correctly used
    § 5845(b) to instruct the jury. As used in the statute,
    4
    Modern versions of those two dictionaries define “automatic”
    in the same terms. W EBSTER ’S T HIRD N EW I NTERNATIONAL
    D ICTIONARY 148 (2002); O XFORD E NGLISH D ICTIONARY 805 (2d ed.
    1989).
    5
    For the sake of efficiency and readability, we use the term
    “shoots” as shorthand for “shoots, is designed to shoot, or can
    be readily restored to shoot,” unless otherwise indicated.
    No. 08-2294                                                11
    “automatically” comports with its ordinary modern
    meaning, see note 4, that is readily accessible to laypersons
    and is in no sense confusing; therefore, the district court
    was not required to define that term for the jury. United
    States v. Castillo, 
    406 F.3d 806
    , 821 (7th Cir. 2005); Miller
    v. Neathery, 
    52 F.3d 634
    , 638 (7th Cir. 1995).
    B. Sufficiency of the Evidence
    Olofson contends that the evidence presented at trial
    was insufficient to sustain his conviction. When a defen-
    dant challenges the sufficiency of the evidence, we
    view the evidence in the light most favorable to the
    government and will reverse the conviction only if no
    rational jury could have found the defendant guilty
    beyond a reasonable doubt. United States v. Castaldi, 
    547 F.3d 699
    , 705 (7th Cir. 2008). In order to convict a person
    of violating 
    18 U.S.C. § 922
    (o)(1), the government must
    prove that 1) the defendant possessed or transferred a
    machinegun 2) with knowledge that the weapon had
    the characteristics that bring it within the statutory defini-
    tion of a machinegun. United States v. McGiffen, 
    267 F.3d 581
    , 590 (7th Cir. 2001).
    Regarding the first element, Kiernicki testified that
    Olofson loaned him the AR-15 on four occasions, the last
    of which was July 13, 2006. An ATF agent also testified
    that Olofson admitted loaning the gun to Kiernicki. In
    addition, Kiernicki stated that the gun fired three or
    four rounds (on several occasions) with one pull of the
    trigger. The government’s expert who test-fired the AR-
    12                                                No. 08-2294
    15 stated that he exhausted a twenty-round magazine
    with one continuous depression of the trigger and
    emptied two additional twenty-round magazines in five-
    or ten-round bursts by intermittently depressing, holding,
    and releasing the trigger. He also declared that the
    weapon was intended to fire in such fashions and that a
    “hammer-follow” malfunction was not the cause. That
    evidence was adequate to permit a reasonable jury to
    find beyond a reasonable doubt that Olofson transferred
    a “machinegun” as defined by § 5845(b). Regarding the
    evidence on the knowledge element, Kiernicki said that
    Olofson told him “the three-round burst wouldn’t work
    and that it would jam up.” Kiernicki understood that
    statement to mean that “[t]hree rounds come out of it
    when you would pull the trigger” once. That testimony
    was sufficient for a reasonable jury to find beyond a
    reasonable doubt that the defendant knew that the AR-15,
    with a single pull of the trigger and without manual
    reloading, could shoot more than one round as the result
    of a self-acting mechanism. For these reasons, the defen-
    dant’s challenge to the sufficiency of the evidence fails.6
    C. Unconstitutional Vagueness
    Olofson argues that 
    18 U.S.C. §§ 922
    (o) and 924(a)(2) are
    unconstitutionally vague. We review the constitutionality
    6
    The jury heard the testimony of the defendant’s firearms
    expert about the AR-15’s supposed malfunctioning and obvi-
    ously rejected it; on a sufficiency-of-the-evidence challenge,
    we will not second-guess the jury’s credibility determinations.
    United States v. Brandt, 
    546 F.3d 912
    , 917 (7th Cir. 2008).
    No. 08-2294                                               13
    of a statute de novo. United States v. Warner, 
    498 F.3d 666
    ,
    697 (7th Cir. 2007). A statute is unconstitutionally vague
    if it either “1) does not provide a person of ordinary
    intelligence a reasonable opportunity to know what is
    prohibited, or 2) fails to provide explicit standards to
    prevent arbitrary and discriminatory enforcement by
    those enforcing the statute.” United States v. Lim, 
    444 F.3d 910
    , 915 (7th Cir. 2006). A vagueness challenge such
    as this one that does not implicate First Amendment
    freedoms is analyzed as applied to the specific facts of
    the case. 
    Id.
    To the extent Olofson contends that the statutes are
    fatally vague due to the way “automatically” is used in the
    incorporated definition of “machinegun” from § 5845(b),
    we disagree. We have already noted that the common
    meaning of “automatically” is readily known by lay-
    persons and thus a specific instruction defining the term
    for the jury was unnecessary. Similarly, a person of ordi-
    nary intelligence would have understood the common
    meaning of the term—“as the result of a self-acting mecha-
    nism”—and thus would have had fair warning of the
    relevant features of a weapon that § 5845(b) covers and that
    §§ 922(o) and 924(a)(2) regulate. Therefore, we reject
    Olofson’s argument that §§ 922(o) and 924(a)(2) are uncon-
    stitutionally vague.7
    7
    Olofson does not present any cogent argument that §§ 922(o)
    and 924(a)(2) lack standards to prevent arbitrary or discrim-
    inatory enforcement.
    14                                               No. 08-2294
    D.    Exclusion of Olofson’s Firearms Expert from the Court-
    room
    The defendant also argues that the district court improp-
    erly granted the government’s request to exclude his
    firearms expert (Len Savage) from the courtroom during
    the testimony of the government’s firearms expert. Olofson
    contends that the presence of his expert during the testi-
    mony of the government’s expert was essential to the
    presentation of his case.
    Under Federal Rule of Evidence 615, “[a]t the request of
    a party the court shall order witnesses excluded so that
    they cannot hear the testimony of other witnesses, and
    it may make the order of its own motion.” That rule
    does not authorize the exclusion of four categories of
    persons, including “a person whose presence is shown
    by a party to be essential to the presentation of the
    party’s cause.” FED. R. E VID. 615(3). As the party asserting
    a Rule 615(3) exception, Olofson bore the burden for
    showing that the exception applied. Opus 3, Ltd. v. Heritage
    Park, Inc., 
    91 F.3d 625
    , 628 (4th Cir. 1996); United States
    v. Jackson, 
    60 F.3d 128
    , 135 (2d Cir. 1995). We review for
    an abuse of discretion a district court’s decision about
    the essentiality of a witness’s presence under Rule 615(3).
    Milicevic v. Fletcher Jones Imports, Ltd., 
    402 F.3d 912
    , 916
    (9th Cir. 2005); Opus 3, 91 F.3d at 629; Jackson, 
    60 F.3d at 135-36
    .
    At trial, Olofson presented two reasons for opposing the
    government’s request to exclude Savage from the court-
    room. First, he argued that because Federal Rule of Evi-
    dence 703 permits an expert to base his opinion upon facts
    No. 08-2294                                                 15
    or data made known to him at trial, Savage “should be
    allowed to be present to hear” the government expert’s
    testimony. However, merely because Rule 703 contem-
    plates that an expert may render an opinion based on
    facts or data made known at trial does not necessarily
    mean that an expert witness is exempt from a Rule 615
    sequestration order. The text of Rule 615 plainly does not
    provide for such a per se exception; rather, Rule 615(3)
    confers discretion upon district courts to determine
    whether a given witness (of whatever stripe) is essential.
    We agree with the courts of appeals that have addressed
    the issue that Rule 703 is not an automatic exemption for
    expert witnesses from Rule 615 sequestration. Miller v.
    Universal City Studios, Inc., 
    650 F.2d 1365
    , 1374 (5th Cir.
    1981); Morvant v. Constr. Aggregates Corp., 
    570 F.2d 626
    , 630
    (6th Cir. 1978); see Opus 3, 91 F.3d at 629. Therefore, the
    mere mention of Rule 703 by Olofson was insufficient
    to show that a Rule 615(3) exception was warranted.
    Second, Olofson stated that he “would like to have
    Mr. Savage present to hear” the government expert’s
    testimony on malfunctions so that he could “rebut or add
    information” if such testimony was incomplete or incor-
    rect. While no precise incantation is required, we doubt
    whether those statements advanced the argument that
    Savage’s presence was essential under Rule 615(3). Olofson
    did not tell the district court (as he tells us on appeal) that
    Savage’s presence was of critical import to his highly-
    technical defense that the AR-15 malfunctioned. Even
    assuming that he did make the argument, Olofson did not
    carry his burden of demonstrating essentiality. The defen-
    dant stated that Savage should be allowed to hear the
    16                                            No. 08-2294
    government expert’s testimony so that Savage could “rebut
    or add information” to any inaccurate testimony about
    malfunctions, but Olofson did not tell the district court
    why Savage’s presence was necessary to achieve that end.
    Indeed, much of the data and malfunction information
    relied upon by the government’s expert was already
    known to Savage due to the pre-trial disclosure of the
    government expert’s reports, and Savage had the op-
    portunity to respond to such materials during the defen-
    dant’s case. Regarding any information which was not
    included in the reports but may have come into
    evidence during the testimony of the government’s
    expert, Olofson had ample opportunity on direct examina-
    tion for Savage to rebut, add to, or opine on the implica-
    tions of such information by asking him to assume its
    existence.
    Although it might have been helpful or desirable for
    Savage to hear the government expert’s testimony,
    Olofson did not show that Savage’s presence was
    essential to the presentation of his case. Therefore, the
    district court did not abuse its discretion in denying
    Savage a sequestration exemption under Rule 615(3).
    E. Denial of Olofson’s Discovery Requests
    Prior to trial and pursuant to Brady, Olofson made a
    motion to compel the discovery of evidence he had re-
    quested but that the government had not produced. The
    defendant sought: 1) documentation of the procedures
    used by the ATF in testing the AR-15; 2) correspondence
    between the ATF and the manufacturer of the defendant’s
    No. 08-2294                                                 17
    AR-15 concerning the use of M-16 parts in early AR-15
    rifles; 3) information about changes in the ATF’s registry
    of AR-15 rifles with M-16 components; and 4) documents
    pertaining to the ATF’s refusal to register AR-15 rifles
    with M-16 parts. The district court denied the defendant’s
    motion on the first day of trial after concluding that
    the information sought was not exculpatory. On ap-
    peal, Olofson claims that the district court committed
    prejudicial error in denying his Brady motion and that he
    therefore is entitled to a new trial. We review a district
    court’s decision that evidence need not be produced under
    Brady for an abuse of discretion. United States v. Dabney,
    
    498 F.3d 455
    , 459 (7th Cir. 2007).
    Under Brady, the government is constrained to disclose
    evidence that is favorable to a defendant and material to
    either his guilt or punishment. United States v. Fallon, 
    348 F.3d 248
    , 251 (7th Cir. 2003). Favorable evidence
    includes both impeachment and exculpatory evidence.
    United States v. Baker, 
    453 F.3d 419
    , 422 (7th Cir. 2006). Even
    when the government has not disclosed such evidence,
    “strictly speaking, there is never a real ‘Brady violation’
    unless the nondisclosure was so serious that there is a
    reasonable probability that the suppressed evidence
    would have produced a different verdict.” Strickler v.
    Greene, 
    527 U.S. 263
    , 281 (1999). “We have described this
    inquiry as ‘materiality,’ and stated that the demonstra-
    tion of materiality is the key to obtaining a new trial
    where a defendant alleges a Brady violation.” Baker, 
    453 F.3d at 422
    . Thus there are three parts to a Brady viola-
    tion: 1) the disputed evidence must be favorable to the
    defendant, either because it is exculpatory or im-
    18                                               No. 08-2294
    peaching; 2) that evidence must have been suppressed by
    the government, either willfully or inadvertently; and 3)
    prejudice must have occurred. Strickler, 
    527 U.S. at 281-82
    .
    Regarding the first non-disclosed item—the ATF’s
    internal procedures for test-firing AR-15 rifles—Olofson
    says he wanted that information because “[f]ailure to
    follow those procedures by changing the type of am-
    munition in the second test could demonstrate that the
    tests had been manipulated to arrive at a reversal of the
    results of the first test.” We do not see how that informa-
    tion could have exculpated Olofson; section 5845(b) does
    not require compliance with ATF test-fire procedures in
    order for a weapon to qualify as a machinegun, nor
    must the weapon fire any particular grade of ammuni-
    tion or in the prohibited fashion during the first test-fire.
    Assuming that such evidence might have had some
    impeachment value, there was no Brady violation because
    the government’s expert was otherwise sufficiently im-
    peached. United States v. Ervin, 
    540 F.3d 623
    , 632 (7th Cir.
    2008) (“Brady does not extend to ‘evidence that impeaches
    an already thoroughly impeached witness.’ ” (quoting
    United States v. Kozinski, 
    16 F.3d 795
    , 819 (7th Cir. 1994))).
    Specifically, Olofson questioned the government’s expert
    at length about ATF test-fire procedures and the types of
    ammunition used in the tests. In addition, the govern-
    ment’s expert admitted that the gun fired automatically
    more than one round with a single function of the trigger
    without manual reloading in the second test with civilian-
    grade rounds, but jammed in the first test with military-
    grade rounds. Even if the second test was inconsistent
    with ATF procedures, that fact would not undermine
    No. 08-2294                                                  19
    confidence in the outcome of the trial. Kyles v. Whitney, 
    514 U.S. 419
    , 434 (1995). Therefore, the district court did not
    abuse its discretion in denying the defendant’s motion
    to compel the production of that evidence.
    With respect to his request for the ATF’s correspondence
    with the manufacturer of his AR-15 concerning the use
    of M-16 parts in early AR-15 rifles, the defendant con-
    tends that evidence was exculpatory because it was
    relevant to his knowledge of whether or not his AR-15
    was a machinegun. The district court denied Olofson’s
    request on the first day of trial. At the sentencing hearing,
    the court revisited the issue; the court inspected a docu-
    ment in camera, stated that it was not exculpatory, and
    placed it under seal. We subsequently ordered that docu-
    ment to be unsealed. That evidence is a 1983 letter from
    the ATF to the manufacturer of the AR-15 in which the
    ATF advised the company that the installation of certain
    M-16 parts in AR-15 receivers may permit the weapon
    to fire automatically even though an automatic sear is not
    present. We agree with the district court that the docu-
    ment is not exculpatory: it has no bearing on Olofson’s
    knowledge of whether his AR-15 was a machinegun.8 The
    8
    The government’s theory of the case was that the AR-15
    functioned as a machinegun, thus implicating the first sentence
    of § 5845(b)’s definition of the term. As discussed earlier, the
    district court instructed the jury using only that part of
    § 5845(b), and sufficient evidence of Olofson’s knowledge of
    the AR-15’s firing capacity was presented to convict him. Had
    the government attempted to prove that a part or combination
    (continued...)
    20                                              No. 08-2294
    letter has no impeachment value either. Therefore, the
    district court did not abuse its discretion in refusing to
    order the production of that evidence.
    Lastly, Olofson argues that any documents relating to
    the ATF’s change in registry or refusal to register AR-15
    rifles with M-16 components were exculpatory because
    they could have been used to refute the government
    expert’s testimony that the M-16 parts in Olofson’s AR-15
    made it a machinegun. But the government’s expert did
    not testify that the AR-15 was a machinegun merely
    because it had M-16 parts; rather, the expert stated that
    the AR-15 fired the way it did due in part to the M-16
    components. Regardless, like the district court, we do not
    see how the ATF’s opinions or positions regarding the
    presence of M-16 parts in AR-15 rifles are the least bit
    germane to Olofson’s conviction for knowingly transferring
    a machinegun. The district court did not abuse its dis-
    cretion in denying Olofson’s motion to compel the gov-
    ernment to produce that evidence.
    III. Conclusion
    In sum, the defendant’s proffered jury instruction was
    not a correct statement of the law, and the district court
    8
    (...continued)
    of parts in the AR-15 made it a machinegun under the second
    sentence of § 5845(b), then perhaps evidence about the manu-
    facturer’s installation of M-16 parts in AR-15s would have
    been relevant to the defendant’s knowledge of those parts in
    the weapon.
    No. 08-2294                                              21
    properly rejected it. Furthermore, the evidence presented
    at trial was sufficient to sustain Olofson’s conviction, and
    
    18 U.S.C. §§ 922
    (o) and 924(a)(2) are not unconstitutionally
    vague as applied to the facts of this case. In addition, the
    district court did not abuse its discretion in either ex-
    cluding the defendant’s firearms expert from the court-
    room during the government expert’s testimony or in
    denying Olofson’s motion to compel the production of
    evidence he had requested from the government. Accord-
    ingly, we A FFIRM Olofson’s conviction.
    5-1-09