Reporters Committee for Freedom of the Press v. FBI , 877 F.3d 399 ( 2017 )


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  •  United States Court of Appeals
    FOR THE DISTRICT OF COLUMBIA CIRCUIT
    Argued November 13, 2017          Decided December 15, 2017
    No. 17-5042
    REPORTERS COMMITTEE FOR FREEDOM OF THE PRESS AND
    ASSOCIATED PRESS,
    APPELLANTS
    v.
    FEDERAL BUREAU OF INVESTIGATION AND UNITED STATES
    DEPARTMENT OF JUSTICE,
    APPELLEES
    Appeal from the United States District Court
    for the District of Columbia
    (No. 1:15-cv-01392)
    Katie Townsend argued the cause for appellants. With her
    on the briefs was Bruce D. Brown.
    Joseph F. Busa, Attorney, U.S. Department of Justice,
    argued the cause for appellees. With him on the brief was
    Matthew M. Collette, Attorney.
    Before: TATEL and KAVANAUGH, Circuit Judges, and
    SILBERMAN, Senior Circuit Judge.
    Opinion for the Court filed by Circuit Judge TATEL.
    2
    TATEL, Circuit Judge: In this Freedom of Information Act
    case, the Reporters Committee for Freedom of the Press and
    the Associated Press seek information from the Federal Bureau
    of Investigation regarding its use of undercover tactics
    involving impersonation of the media and creation of fake
    news. After the Bureau turned over several pertinent records,
    the district court granted summary judgment in its favor. We
    reverse. As explained below, the Bureau has failed to
    demonstrate that it “conduct[ed] a search for the requested
    records, using methods which can be reasonably expected to
    produce the information requested.” Oglesby v. U.S.
    Department of the Army, 
    920 F.2d 57
    , 68 (D.C. Cir. 1990).
    I.
    In 2007, Seattle-area Timberline High School began
    receiving anonymous bomb threats, which prompted daily
    evacuations. See U.S. Department of Justice, Office of the
    Inspector General, A Review of the FBI’s Impersonation of a
    Journalist in a Criminal Investigation 1 (2016) (“OIG
    Report”), Joint Appendix (J.A.) 538. Unable to trace the
    emailed threats to their sender, local authorities called in
    cybercrime experts from the FBI’s Seattle Division. 
    Id. Sensing the
    handiwork of a narcissist, the FBI agents devised a plan: if
    they could flatter the culprit into clicking a link to what
    appeared to be press coverage suggesting that he had
    outsmarted the authorities, they could, in turn, outsmart him by
    secretly delivering specialized malware that would reveal his
    computer’s location. 
    Id. at 11–12,
    J.A. 548–49. Warrant in
    hand, an FBI Special Agent contacted an anonymous social-
    media account associated with the threats, identified himself as
    an Associated Press “Staff Publisher,” and requested input on
    a draft article accessible through an emailed link. 
    Id. at 14–15,
    J.A. 551–52. The suspect took the bait, clicking the link and
    unwittingly downloading the malware. 
    Id. at 16,
    J.A. 553.
    Within hours, the FBI had its man. 
    Id. 3 Flash
    forward seven years to October 2014, when an
    American Civil Liberties Union technologist spotted a
    reference to the FBI’s ruse—which had previously drawn little
    public attention—in a set of FBI documents released years
    earlier to an electronic privacy organization. Troubled, the
    technologist took to Twitter, and within days, news of the
    media impersonation tactics employed at Timberline prompted
    headlines nationwide. Facing outcry from news outlets, interest
    groups, and members of Congress, then–FBI Director James
    Comey, Jr., penned a letter to the New York Times justifying
    the tactics. But the public’s interest had already been roused.
    Among those wanting to learn more were the Reporters
    Committee for Freedom of the Press and the Associated Press,
    appellants here, which were concerned that “[t]he utilization of
    news media as a cover for delivery of electronic surveillance
    software” both “endangers the media’s credibility and creates
    the appearance that it is not independent of the government”
    and “undermines media organizations’ ability to independently
    report on law enforcement.” Letter from Reporters Committee
    for Freedom of the Press et al. to Eric H. Holder, Jr., Attorney
    General, U.S. Department of Justice, and James B. Comey, Jr.,
    Director, FBI, at 3 (Nov. 6, 2014), J.A. 384. Between them, the
    two organizations (hereinafter “the Reporters Committee”)
    submitted three requests under the Freedom of Information Act
    (FOIA), 5 U.S.C. § 552, seeking FBI records on the Bureau’s
    policies governing media impersonation, the use of such tactics
    during the Timberline investigation, and any other occasions
    on which the FBI had used fake news links to deliver malware.
    After the FBI responded to one request by declaring it had
    found no responsive records, and failed to respond at all to the
    other two, the Reporters Committee filed suit against the
    Bureau and its parent agency, the Department of Justice,
    claiming among other things that the FBI had conducted an
    inadequate records search. During the course of litigation, the
    4
    FBI eventually located and released some responsive records,
    most pertaining to Timberline and none identifying any other
    instances of media impersonation. The Reporters Committee
    insisted that the FBI’s search efforts were insufficient, but the
    district court disagreed and granted summary judgment to the
    agencies.
    II.
    “Designed ‘to facilitate public access to Government
    documents,’ [FOIA] requires federal agencies to disclose
    information to the public upon reasonable request unless the
    records at issue fall within specifically delineated exemptions.”
    Judicial Watch, Inc. v. FBI, 
    522 F.3d 364
    , 365–66 (D.C. Cir.
    2008) (quoting Department of State v. Ray, 
    502 U.S. 164
    , 173
    (1991)). No exemption is at issue in this appeal; rather, the lone
    issue before us is whether the FBI responded to the Reporters
    Committee’s FOIA requests by conducting a search adequate
    to support summary judgment in the government’s favor. To
    prevail on summary judgment, an “agency must show that it
    made a good faith effort to conduct a search for the requested
    records, using methods which can be reasonably expected to
    produce the information requested,” which it can do by
    submitting “[a] reasonably detailed affidavit, setting forth the
    search terms and the type of search performed, and averring
    that all files likely to contain responsive materials (if such
    records exist) were searched.” 
    Oglesby, 920 F.2d at 68
    .
    “[S]ummary judgment is inappropriate” if “a review of the
    record raises substantial doubt” as to the search’s adequacy,
    “particularly in view of ‘well defined requests and positive
    indications of overlooked materials.’” Valencia-Lucena v. U.S.
    Coast Guard, 
    180 F.3d 321
    , 326 (D.C. Cir. 1999) (quoting
    Founding Church of Scientology v. NSA, 
    610 F.2d 824
    , 837
    (D.C. Cir. 1979)). “We review de novo the adequacy of the
    [agency’s] search.” DiBacco v. U.S. Army, 
    795 F.3d 178
    , 188
    (D.C. Cir. 2015).
    5
    Here, the government submitted two declarations from
    David M. Hardy, Section Chief of the FBI’s
    Record/Information Dissemination Section (“Records
    Section”), which describe a two-phase search. In the first
    phase, made up of so-called “targeted searches,” the Records
    Section identified the Bureau divisions it considered
    reasonably likely to hold responsive records, and transmitted to
    each such division the verbatim text of the relevant FOIA
    request along with instructions to “send an e-mail to each of its
    employees asking them to search for all relevant records
    pertaining to th[e] request” and “help identify all potentially
    responsive documents, regardless of whether they may be
    located in their office or elsewhere in the Bureau.” Declaration
    of David M. Hardy ¶¶ 38–40, 43–45 (Mar. 28, 2016) (“First
    Hardy Decl.”), J.A. 112–16; see also Declaration of David M.
    Hardy ¶¶ 4, 6 (May 20, 2016) (“Second Hardy Decl.”), J.A.
    492–93.
    To facilitate the targeted searches, the FBI divided the
    records sought into two groups. For Group One records—those
    “concerning the FBI’s utilization of links to what are, or appear
    to be, news media articles or news media websites to install”
    certain malware—the Records Section ordered a targeted
    search of only the Bureau’s Operational Technology Division
    (“Tech Division”). First Hardy Decl. ¶¶ 34, 38–40, J.A. 110,
    112–13. The Records Section reasoned that the Tech Division,
    as the “Division responsible for the deployment and
    implementation of” the malware used at Timberline, would be
    “reasonably likely” to hold Group One records and that “no
    other FBI Divisions or personnel would reasonably likely
    possess” them. 
    Id. ¶ 40,
    J.A. 113. For Group Two records—
    including Timberline-specific documents and media-related
    policy and training materials, as well as “[a]n accounting of the
    number of times . . . the [FBI] has impersonated media
    organizations or generated media-style material” to deliver
    6
    malware—the Records Section ordered targeted searches of
    several internal divisions, including the FBI’s Seattle Division,
    the Office of General Counsel, the Tech Division, the
    Behavioral Analysis Unit, the National Covert Operations
    Section, and the Training Division. 
    Id. ¶¶ 34,
    43, J.A. 110–11,
    114–15.
    According to the Hardy declarations, these internal
    divisions “completed” the searches they were directed to carry
    out. 
    Id. ¶¶ 39,
    44, J.A. 113, 115. In the case of the Group One
    search, the Tech Division “advised [the Records Section] that
    no records responsive to th[e] request were located within its
    Division.” 
    Id. ¶ 39,
    J.A. 113. In the case of the Group Two
    searches, “the FBI was able to locate records responsive to [the
    Reporters Committee’s] requests.” 
    Id. ¶ 45,
    J.A. 116.
    In the search’s second phase, the Records Section
    conducted a limited index search of the FBI’s agency-wide
    Central Records System (“the Index”), which “index[es] terms
    in files that are useful to a particular investigation or that are
    deemed potentially useful for future investigative/intelligence
    retrieval purposes, such as names of individuals, organizations,
    companies, publications, activities, or foreign intelligence
    matters (or programs).” 
    Id. ¶ 36,
    J.A. 112. Initially, the Records
    Section searched the Index for Timberline records only, using
    the search terms “Timberline,” “Timberline High School,” and
    “Timberline Highschool.” 
    Id. ¶ 57,
    J.A. 121. This search
    yielded “the FBI’s main investigative file concerning” the
    Timberline investigation. 
    Id. After “[a]
    page by page review,”
    however, the Records Section determined that the file
    contained only records that the Seattle Field Office had already
    unearthed through its targeted search. 
    Id. Although the
    Records
    Section at first declined to search the Index for Group One
    records—i.e., records about other instances in which the FBI
    used media links to install malware—because the Index would
    7
    not “programmatically or logically contain terms that would
    lead to records responsive” to a request for information about
    general investigatory tactics, 
    id. ¶ 36,
    J.A. 112, the FBI did
    later conduct an Index search for Group One records, using the
    search terms “media impersonation” and “CIPAV,” the name
    of the malware used in the Timberline investigation, Second
    Hardy Decl. ¶ 5, J.A. 492–93. This search yielded no results.
    
    Id. The Reporters
    Committee argues that the Hardy
    declarations fail to carry the government’s burden of showing
    that it conducted an adequate search under this circuit’s
    standards. We agree.
    The declarations’ principal flaw lies in their failure to
    “set[] forth the search terms and the type of search performed”
    with the specificity our precedent requires. 
    Oglesby, 920 F.2d at 68
    . The declarations explain that the Records Section
    “request[ed]” that each targeted office “conduct a search of
    database systems, as well as paper and manual files, for records
    responsive to” the Reporters Committee’s requests, and
    “recommended” that each office email its employees, “asking
    them to search for all relevant records.” First Hardy Decl.
    ¶¶ 38, 43, J.A. 112–15. The declarations go on to say that the
    targeted divisions “completed” the requested searches, 
    id. ¶¶ 39,
    44, J.A. 113, 115, without ever describing how those
    divisions in fact did so.
    This circuit’s precedent has long made clear that an
    affidavit containing “no information about the search strategies
    of the [agency] components charged with responding to [a]
    FOIA request” and providing no “indication of what each
    [component’s] search specifically yielded” is inadequate to
    carry the government’s summary-judgment burden. Morley v.
    CIA, 
    508 F.3d 1108
    , 1122 (D.C. Cir. 2007); see also, e.g.,
    8
    Aguiar v. Drug Enforcement Administration, 
    865 F.3d 730
    ,
    738–39 (D.C. Cir. 2017) (affidavit identifying agency offices
    “tasked with conducting a search” of specific files but not
    explaining “how [the offices] searched within those files”
    insufficient to support summary judgment); DeBrew v.
    Atwood, 
    792 F.3d 118
    , 121–22 (D.C. Cir. 2015) (affidavit
    identifying agency employees tasked with conducting search,
    explaining why those employees were chosen, and detailing
    search’s results insufficient “because it [did] not disclose the
    search terms used by the [agency] and the type of search
    performed”); Weisberg v. DOJ, 
    627 F.2d 365
    , 371 (D.C. Cir.
    1980) (affidavit that fails to “denote which files were searched
    or by whom, . . . reflect any systematic approach to document
    location, . . . [or] provide information specific enough to enable
    [a plaintiff] to challenge the procedures utilized” is
    insufficient). This is so, we have explained, because “[a]
    reasonably detailed affidavit, setting forth the search terms and
    the type of search performed, . . . is necessary to afford a FOIA
    requester an opportunity to challenge the adequacy of the
    search and to allow the district court to determine if the search
    was adequate in order to grant summary judgment.” 
    Oglesby, 920 F.2d at 68
    .
    Here, the Hardy declarations are utterly silent as to which
    files or record systems were examined in connection with the
    targeted searches and how any such searches were conducted,
    including, where relevant, which search terms were used to
    hunt within electronically stored materials. This defect is
    particularly conspicuous when viewed alongside the
    declarations’ far more specific description of the Index search
    the Records Section conducted for Timberline records. This
    latter discussion explains the Index’s nature and functionality,
    identifies the search terms used to look within the Index,
    describes the search results, and attests that FBI personnel
    9
    undertook “[a] page by page review” of those results. First
    Hardy Decl. ¶ 57, J.A. 121.
    Even though the Reporters Committee’s brief cites our
    consistent line of cases requiring that government affidavits
    describe precisely how agency components searched for
    responsive documents, the government’s brief is virtually
    silent on this precedent, stating only in conclusory fashion that
    “[a]n agency affidavit, describing a targeted search of a specific
    office as part of a broader search, does not need to elaborate
    further” to achieve the level of detail FOIA requires.
    Appellees’ Br. 22. This question-begging assertion fails
    entirely to engage with the standards our court has developed
    for determining when an affidavit has adequately “describ[ed]
    a targeted search of a specific office.” 
    Id. The government
    seeks support from our 35-year-old decision in Perry v. Block,
    
    684 F.2d 121
    (D.C. Cir. 1982) (per curiam), which, as the
    government points out, stated that an affidavit need not “set
    forth with meticulous documentation the details of an epic
    search for the requested records,” 
    id. at 127.
    In Perry, however,
    we also made clear—in a passage not quoted by the
    government—that an affidavit must “explain in reasonable
    detail the scope and method of the search conducted,” and
    “urge[d] agency affiants and counsel to provide as much
    specificity as possible to facilitate intelligent assessment of the
    submitted information.” 
    Id. Although the
    Perry court
    ultimately determined that summary judgment for the
    government was appropriate on the specific facts of that case,
    the affiants there attested that they had personally participated
    in searches of specifically identified records systems—and,
    even so, the court found the affidavits “arguabl[y]
    inadequa[te]” and remarked that they “could have been more
    detailed.” 
    Id. at 127
    & nn.20–21.
    10
    Pressed at oral argument to reconcile the government’s
    position here with circuit precedent, government counsel
    offered a new explanation for the Hardy declarations’ failure to
    describe the targeted searches with anything resembling
    precision. According to counsel, in “all of [our] prior cases
    talking about search terms,” plaintiffs sought “specific
    information about an identifiable individual or code word . . .
    or administrative warrants known to exist within a single
    investigative file,” Oral Arg. at 18:12–29, whereas the FOIA
    requests here sought “something nebulous and vague, not
    known to exist,” 
    id. at 21:30–33.
    This proposed distinction is
    both wrong and irrelevant. It is wrong because our cases have
    demanded greater specificity from the affidavit in connection
    with equally generic FOIA requests. See, e.g., 
    DeBrew, 792 F.3d at 121
    –22 (affidavit insufficient to determine adequacy of
    search for “[a]ll documentation for making Conducting a
    Business . . . a prohibited act” under Bureau of Prisons
    guidelines). And it is irrelevant because the specifics of a
    particular FOIA request have no logical bearing on an agency’s
    ability to make a factual representation of what steps it has
    taken to honor the request. Here, for example, the FBI could
    have explained that it was difficult to come up with search
    terms reasonably calculated to turn up the records the Reporters
    Committee sought and then gone on to describe how it
    attempted to work around that difficulty. Because the FBI
    failed to offer any such explanation, the Reporters Committee
    was left without “information specific enough . . . to challenge
    the procedures utilized,” 
    Weisberg, 627 F.2d at 371
    , and this
    court lacks any basis for “determin[ing] if the search was
    [sufficiently] adequate in order to grant summary judgment” to
    the government, 
    Oglesby, 920 F.2d at 68
    .
    III.
    Although the Hardy declarations’ inadequate detail is
    alone sufficient to require reversal, the Reporters Committee
    11
    has identified two additional aspects of the FBI’s search that
    concern us.
    A.
    The Reporters Committee argues that the FBI failed to
    justify its decision to limit its search for Group One records,
    i.e., “records concerning the FBI’s utilization of links to what
    are, or appear to be, news media articles or news media
    websites to install” malware, to the Tech Division, while
    searching more broadly for “documents referring to the
    decision to create the fake [Associated Press] news article in
    the Timberline High School case.” First Hardy Decl. ¶ 34, J.A.
    110–11. Because the former set of requested records
    encompasses the latter, the Reporters Committee insists, the
    FBI acted illogically in declining to consider that locations
    reasonably likely to hold Timberline-specific records would be
    similarly likely to hold records pertaining more generally to
    other instances of media impersonation.
    We agree that the FBI could have better justified its search
    methods. For Timberline documents, the Records Section
    ordered targeted searches of a number of Bureau divisions,
    including the Office of General Counsel, the Tech Division, the
    Behavioral Analysis Unit, the National Covert Operations
    Section, and the Training Division, 
    id. ¶ 43,
    J.A. 114–15; by
    contrast, for the broader set of Group One documents, Records
    ordered a targeted search of the Tech Division alone, 
    id. ¶ 38,
    J.A. 112–13. Attempting to justify this distinction, the FBI
    points out that the Group One request sought records linking
    media impersonation to the installation of malware, whereas
    the Timberline request sought records relating only to the
    decision to impersonate the press in the first place. Because
    “the FBI’s policy specifically states that [the Tech Division] is
    solely responsible for the deployment and collection of all
    lawfully conducted electronic surveillance [B]ureau wide,”
    12
    Second Hardy Decl. ¶ 4, J.A. 491, the FBI reasoned, nowhere
    else was likely to hold records regarding the use of malware.
    This does not follow. Certainly, the Tech Division’s role
    in approving malware use makes it likely to hold relevant
    records. But that hardly means that “no other FBI Divisions or
    personnel would reasonably likely possess records” regarding
    the tactics used to deploy such malware. First Hardy Decl. ¶ 40,
    J.A. 113. Indeed, the Timberline incident provides a ready
    illustration of just what those other divisions might be. For
    example, record evidence demonstrates that the agents
    involved in the Timberline investigation conferred with the
    Behavioral Analysis Unit regarding how best to deliver
    malware. See OIG Report at 12, J.A. 549. Further undermining
    its claim that malware-related records were likely to appear
    nowhere but the Tech Division, the Bureau on its own accord
    elected to group the request for “an accounting of the number
    of times . . . that the [FBI] has impersonated media
    organizations or generated media-style material . . . to deliver
    malicious software,” First Hardy Decl. ¶ 34, J.A. 111
    (emphasis added), with the Group Two requests for which it
    ordered multiple targeted searches and not with the Group One
    request for which it searched only the Tech Division.
    Put simply, given the FBI’s determination that certain
    divisions were “reasonably likely” to hold records relating to a
    specific instance where media impersonation was used to
    deliver malware, its failure to search these very same divisions
    for records relating to other such instances leaves us unable to
    conclude, barring some explanation, that the FBI searched for
    the latter records in a manner “reasonably expected to produce
    the information requested.” 
    Oglesby, 920 F.2d at 68
    .
    In making this observation, we take no position on the
    adequacy of the FBI’s explanation for performing an Index
    13
    search for Timberline records but, at least initially, not for the
    broader set of Group One records. The Hardy declarations
    justified this distinction by remarking that the Timberline
    request referenced a particular, named event likely to be
    indexed (and thus searchable) in the Index, First Hardy Decl.
    ¶ 41, J.A. 114, whereas an Index search for Group One records
    would likely have garnered little because “it would be highly
    unlikely for FBI personnel to index files . . . under the name of
    a specific technique generally or specifically in reference to
    impersonating a member of the media,” Second Hardy Decl.
    ¶ 2, J.A. 490. Suffice it to say that the FBI did eventually
    conduct an Index search for Group One records, and save a
    passing mention in a footnote in its opening brief, the Reporters
    Committee does not challenge the adequacy of this search.
    B.
    The Reporters Committee also argues that the search was
    inadequate because the record contains “lead[s] that [are] both
    clear and certain,” Kowalczyk v. DOJ, 
    73 F.3d 386
    , 389 (D.C.
    Cir. 1996), that should have prompted the FBI to search
    additional offices—i.e., the FBI Director’s Office, field offices
    other than the Seattle office, and the offices responsible for
    assisting with a 2016 Office of the Inspector General (OIG)
    report concerning Timberline and the FBI’s media
    impersonation policies. Beginning with the Director’s Office,
    we consider each of these offices in turn.
    Recall that the Reporters Committee and the Associated
    Press submitted their FOIA requests amidst a national
    controversy over revelations regarding the FBI’s media
    impersonation tactics. The Attorney General and FBI Director
    were receiving letters from concerned interest groups and even
    members of Congress. At the same time, the FBI was
    responding to articles covering the matter in the popular press,
    and the FOIA requests specifically referenced these responses.
    14
    See Letter from Raphael Satter, Associated Press, to FBI, at 2
    (Nov. 6, 2014), J.A. 27 (citing an FBI special agent’s comment
    to the Seattle Times); Letter from Adam Marshall & Hannah
    Bloch-Wehba, Reporters Committee for Freedom of the Press,
    to FBI, at 2 n.1 (Oct. 31, 2014), J.A. 31 (citing Washington Post
    article that contains remarks from FBI officials).
    The record unmistakably establishes that the FBI
    Director’s Office was intimately involved in coordinating the
    Bureau’s response. Indeed, in his letter to the editor in the New
    York Times, then-Director Comey called the Timberline tactics
    “proper and appropriate under Justice Department and [FBI]
    guidelines at the time,” while reassuring the public that by the
    time of the letter’s November 2014 publication, “the use of
    such an unusual technique would probably require higher level
    approvals than in 2007.” James B. Comey, Director, FBI,
    Letter to the Editor, “To Catch a Crook: The F.B.I.’s Use of
    Deception,” New York Times, Nov. 6, 2014. Although the
    Director’s letter reveals that he was privy to information
    covered by the FOIA request for “records concerning the FBI’s
    guidelines and policies concerning undercover operations or
    activities in which a person may act as a member of the news
    media,” First Hardy Decl. ¶ 34, J.A. 111, the Bureau never
    searched his office.
    We acknowledge that “it will be the rare case indeed in
    which an agency record contains a lead so apparent that the
    [agency] cannot in good faith fail to pursue it.” 
    Kowalczyk, 73 F.3d at 389
    . Nevertheless, we find this exacting standard
    satisfied here, where the record reveals an agency office
    directly and conspicuously weighing in on a pointedly relevant,
    highly public controversy to which a FOIA request expressly
    refers. See 
    Valencia-Lucena, 180 F.3d at 327
    (“[I]f an agency
    has reason to know that certain places may contain responsive
    15
    documents, it is obligated under FOIA to search barring an
    undue burden.”).
    By contrast, we disagree with the Reporters Committee
    that references in the record to regional offices other than
    Seattle’s and the September 2016 release of an OIG report
    concerning Timberline and the FBI’s media impersonation
    policies constitute “clear and certain” indications that
    additional, unsearched offices held responsive records.
    
    Kowalczyk, 73 F.3d at 389
    .
    On the first point, the Reporters Committee identifies
    fleeting references in the record to other FBI field offices that
    have utilized malware in conducting investigations. None of
    these references, however, offers any hint—let alone a clear
    indication—that the FBI used media impersonation as the
    particular means of deploying the malware.
    On the second point, while the OIG report certainly
    indicates that the offices assisting with its preparation held
    records at some point prior to September 2016, the FBI utilized
    cutoff dates of January 6, 2015, and earlier, directing its
    divisions to search only for records held prior to those dates.
    Second Hardy Decl. ¶¶ 4, 6, J.A. 492–93. But despite
    contesting these cutoff dates in the district court, the Reporters
    Committee failed in its opening brief here to challenge that
    court’s rejection of its argument and so has forfeited the
    opportunity to do so. See Russell v. Harman International
    Industries, Inc., 
    773 F.3d 253
    , 255 n.1 (D.C. Cir. 2014)
    (argument not raised in opening brief on appeal is forfeited).
    And the OIG report contains no clear indication that
    participating offices held responsive records prior to the cutoff
    dates, more than a year and a half before the report was issued.
    Finally, to the extent the Reporters Committee argues that
    the OIG report calls the adequacy of the search into question
    16
    because it refers to a handful of Timberline-related documents
    that the search apparently failed to turn up, “the adequacy of a
    search is ‘determined not by the fruits of the search, but by the
    appropriateness of [its] methods.’” Hodge v. FBI, 
    703 F.3d 575
    , 580 (D.C. Cir. 2013) (alteration in original) (quoting
    Iturralde v. Comptroller of the Currency, 
    315 F.3d 311
    , 315
    (D.C. Cir. 2003)). That a few responsive documents may have
    slipped through the cracks does not, without more, call into
    question the search’s overall adequacy. See Mobley v. CIA, 
    806 F.3d 568
    , 583 (D.C. Cir. 2015) (“[A] search, under FOIA, ‘is
    not unreasonable simply because it fails to produce all relevant
    material.’” (quoting Meeropol v. Meese, 
    790 F.2d 942
    , 952–53
    (D.C. Cir. 1986))).
    IV.
    Finding that material factual questions remain as to the
    adequacy of the FBI’s search, we reverse and remand to the
    district court for further proceedings consistent with this
    opinion.
    So ordered.