Opinion for the Court filed by Circuit Judge ROGERS.
Following his conviction of drugs and weapons charges, Willie Boyd filed a series of requests for information under the Freedom of Information Act (“FOIA”), 5 U.S.C. § 552, in an attempt to uncover alleged violations of
Brady v. Maryland,
I.
Boyd was arrested on a parole violation warrant at his girlfriend’s house on February 1, 1997. Based on a gun and a black bag containing cocaine that were found in the master bedroom closet, Boyd was indicted and convicted of drugs and weapons charges, including being a felon in possession of a firearm and of possession with intent to distribute cocaine. His conviction was affirmed on appeal.
United States v. Boyd,
*385 In 1998 Boyd filed the first of several FOIA requests seeking information about himself and Troupe from several federal agencies involved in Boyd’s prosecution, including the Executive Office for United States Attorneys (“Attorneys’ Office”), the Bureau of Alcohol, Tobacco, Firearms, and Explosives (“BATF”), and the Bureau of Prisons (“BOP”). The agencies released some documents and withheld others pursuant to FOIA Exemptions 7(A), 7(C), and 7(D). 1 In 1999, Boyd filed a complaint, and later an amended complaint, challenging the agencies’ invocations of FOIA exemptions and the adequacy of their searches. The district court granted summary judgment to the Attorneys’ Office and BOP, but denied judgment to BATF based, in part, on its failure to demonstrate the adequacy of its search.
Upon a further search, BATF located a work file that had been kept by the BATF agent in charge of the investigation in Boyd’s criminal case. Because the work file contained documents that were not part of the official case file, BATF processed it for release in accordance with Boyd’s FOIA request. The district court, after appointing counsel for Boyd and ordering discovery, granted summary judgment to BATF. The district court denied Boyd’s request for costs on the ground that he had not substantially prevailed.
Following new FOIA requests in 2003 and 2004 to the Criminal Division of the Justice Department (“Criminal Division”) and the United States Marshals Service (“Marshals Service”) for information about himself and Troupe, Boyd filed another complaint. The district' court granted summary judgmént to the agencies, finding that they had demonstrated the adequacy of their searches and ruling that they had properly invoked exemptions to withhold information. By order of December 27, 2005, this court consolidated Boyd’s appeals.
II.
Congress established FOIA to allow private persons to access government records and thereby be informed about “what their government is up to.” U.S.
Dep’t of Justice v. Reporters Comm. for Freedom of the Press,
A.
Exemption 7(A) authorizes the withholding of “records or information compiled for law enforcement purposes, but only to the extent that the produc
*386
tion of such law enforcement records or information ... could reasonably be expected to interfere with enforcement proceedings.” 5 U.S.C. § 552(b)(7)(A). The government meets its burden by demonstrating that release of the requested information would reveal “the size, scope and direction of [the] investigation” and thereby “allow for the destruction or alteration of relevant evidence, and the fabrication of fraudulent alibis.”
Alyeska Pipeline Serv. Co. v. U.S. Envtl. Prot. Agency,
In Boyd’s case, the government explained that disclosure would “promote the criminal activity of’ the targets of the investigation, “allow [the targets] to avoid arrest and prosecution,” and “provide them information that would allow them to change their operations to avoid detection.” Because the individuals under investigation are all “related [to], controlled [by], or influenced by” Boyd, disclosure of the information could reasonably be expected to reveal to the targets “the size, scope, and direction of [the] investigation,”
Alyeska,
The government’s explanation also adequately meets Amicus’s contentions that the government has not identified “a concrete prospective law enforcement proceeding,”
see Bevis v. Dep’t of State,
Although Amicus implied during oral argument that no investigations involving Boyd were still active, the government’s affidavit states that the investigation at issue involves the “ongoing collection of data” and that the withheld records relate to “potential criminal proceedings against individuals.”
See Mapother,
B.
Exemption 7(C) authorizes the government to withhold “records or information compiled for law enforcement purposes, but only to the extent that the production of such law enforcement records or information ... could reasonably be expected to constitute an unwarranted invasion of personal privacy.” 5 U.S.C. § 552(b)(7)(C). The government may nonetheless be required to disclose the documents if the individual seeking the information demonstrates a public interest in the information that is sufficient to over
*387
come the privacy interest at issue.
See Reporters Comm.,
Amicus posits district court error on the government’s obligation under
Brady
to disclose exculpatory evidence in Boyd’s criminal trial. In
Brady,
the Supreme Court held that “suppression by the prosecution of evidence favorable to an accused upon request violates due process where the evidence is material either to guilt or to punishment.”
Brady,
Even assuming Amicus has identified a sufficient public interest, we conclude that Exemption 7(C) was properly invoked because Amicus has failed to “produce evidence that would warrant a belief by a reasonable person that the alleged Government impropriety might have occurred.”
Favish,
Second, Amicus points to the discovery of the BATF agent’s work file during Boyd’s FOIA litigation as indicating that the government may not have complied with its
Brady
obligations. Amicus suggests that the prosecutor in Boyd’s criminal case may have been unaware of the documents in that file and therefore may have mistakenly thought he had disclosed all material exculpatory evidence. Neither Amicus nor Boyd, however, produces any evidence that the work file actually contained
Brady
or Jencks material that had not been disclosed. Although Boyd had sought a report of an interview of a man named Albert Greer, because the report was located in the work file and subsequently disclosed, the issue is moot for purposes of this FOIA action.
See Perry v. Block,
Thus both Amicus and Boyd fail to produce evidence sufficient to meet the
Favish
standard. Unsubstantiated assertions of government wrongdoing — e.g., regarding the seizure of Boyd’s jailhouse phone conversations, lies by the prosecutor, and alleged perjury by a U.S. Marshal — do not establish “a meaningful evidentiary showing.”
See Favish,
In addition to withholding and redacting information under Exemption 7(C), in response to Boyd’s requests for information concerning Troupe, the Attorneys’ Office and the Marshals Service also issued Glomar responses, refusing either to confirm or to deny the existence of responsive information,
see Phillippi v. CIA,
Although in other circumstances a remand might be required for the district court to determine whether the government possesses the requested information and, if so, whether its withholding of the information is justified, as was true in
Benavides, id.,
none is required here. The government properly invoked Exemption 7(C) to protect information concerning Troupe. Because Boyd was not entitled to this information, he was not harmed by the government’s refusal to confirm or deny whether it possessed responsive information. Any error, then, in invoking Glomar would not entitle Boyd to anything more under FOIA.
See also Oguaju v. United States,
C.
Exemption 7(D) authorizes the withholding of “records or information compiled for law enforcement purposes, but only to the extent that the production of such law enforcement records or information ... could reasonably be expected to disclose the identity of a confidential source ... and, in the case of a record or information compiled by criminal law enforcement authority in the course of a criminal investigation ... information furnished by a confidential source.” 5 U.S.C. § 552(b)(7)(D). “[A] source is confidential within the meaning of Exemption 7(D) if the source provided information under an express assurance of confidentiality or in circumstances from which such an assurance could be reasonably inferred.”
U.S. Dep’t of Justice v. Landano,
Amicus does not claim that the informant in Boyd’s case did not receive an assurance of confidentiality. Boyd’s assertion that the government’s declarations are inconsistent, because one refers to an express assurance while another refers to an implied assurance, ignores the possibility that more than one informant may have been involved in his case or that the informant may have received both assurances, albeit at different times; in any event, Boyd offers nothing that would call into question the evidence cited in the BATF affidavit to demonstrate the informant received an express grant of confidentiality. Hence, the government may properly invoke Exemption 7(D) to withhold the identity of the confidential informant in Boyd’s case and the information furnished by the
*390
informant. Although Amicus makes much of the fact that Troupe’s status as an informant was confirmed in
Miller,
that confirmation does not amount to an admission that he was an informant in Boyd’s case as well. We need not address Amicus’s contention that the government is nonetheless required to disclose the same information that was officially disclosed in the
Miller
case,
see Wolf v. CIA,
Amicus also contends that the government is precluded from invoking Glomar in conjunction with Exemption 7(D) in response to Boyd’s requests for information concerning Troupe because his status as an informant was officially confirmed in Miller. Because we concluded that the government’s invocation of Glomar in conjunction with Exemption 7(C) deprived Boyd of no information to which he was entitled, there is no need to revisit the issue with regard to Exemption 7(D). Any information that may have been the subject of an erroneous invocation of Glomar was nonetheless properly withheld under Exemption 7(C).
To the extent Amicus also contends that the government should not be able to withhold under Exemption 7(D) material. exculpatory evidence that was wrongfully withheld at Boyd’s trial, Amicus presents a policy argument for Congress’s consideration. The disclosure obligation that
Brady
imposes at a defendant’s criminal trial based on constitutional considerations is not the same disclosure obligation imposed under FOIA by Congress. To vindicate the former, a defendant may collaterally attack his conviction pursuant to 28 U.S.C. § 2255.
See Kyles,
D.
Amicus’s other challenges to the grants of summary judgment fail. Boyd’s pro se briefs also provide no basis for finding district court error.
The affidavits filed by the agencies in response to Boyd’s FOIA requests make clear that their “search[es] [were] reasonably calculated to uncover all relevant documents.”
Weisberg v. U.S. Dep’t of Justice,
The district court did not abuse its broad discretion in declining to conduct an
in camera
inspection of the BATF agent’s work file and of the documents withheld under Exemption 7(D).
See Carter v. U.S. Dep’t of Commerce,
Neither did the district court abuse its discretion by declining to order the government to disclose all segregable information in records withheld under Exemption 7(D). Observing that grand jury testimony associated Troupe with the gun and drugs found in his sister’s home where Boyd was arrested, Amicus speculates that the government may have questioned Troupe about the items without giving him assurances of confidentiality, and thus seg-regable non-exempt documents may exist. The agencies are entitled to a presumption that they complied with their obligation to disclose “any reasonably segregable portion of a record,” 5 U.S.C. § 552(b);
cf. U.S. Postal Serv. v. Gregory,
Nordid the district court abuse its discretion by not requiring the government to specify the date on which the Criminal Division destroyed responsive documents. Amicus, noting the several month delay between Boyd’s request for documents and the Criminal Division’s response, suggests that the Criminal Division may have acted in bad faith in destroying the documents and seeks the date of destruction to support its claims. This court has rejected the notion that an initial agency delay in responding to a FOIA request constitutes bad faith.
See Iturralde,
Finally, the district court did not err in denying Boyd’s request for costs because he did not “substantially prevail[ ].” 5 U.S.C. § 552(a)(4)(E). In neither of the March 15, 2002 orders on which Amicus relies did the district court order the government to turn over documents to Boyd.
See Edmonds v. Fed. Bureau of Investigation,
Accordingly, we affirm the grants of summary judgment.
Notes
. The government also withheld documents pursuant to Exemption 3, which covers "matters that are ... specifically exempted from disclosure by statute.” 5 U.S.C. § 552(b)(3). Because the government advised during oral argument that these documents have been released to Boyd, Amicus’s challenge to the invocation of Exemption 3 is moot.
See Perry v. Block,
. Section 552(c)(2) provides:
Whenever informant records maintained by *389 a criminal law enforcement agency under an informant's name or personal identifier are requested by a third party according to the informant’s name or personal identifier, the agency may treat the records as not subject to the requirements of this section unless the informant’s status as an informant has been officially confirmed.
5 U.S.C. § 552(c)(2).
