Opinion for the Court filed by Senior Circuit Judge EDWARDS.
Appellant James Becton was sentenced to 300 months in prison after a jury convicted him of conspiracy to distribute and possess with intent to distribute fifty grams or more of cocaine base (“crack”), five kilograms or more of cocaine, and cannabis, along with ten counts of unlawful use of a communication facility to facilitate the conspiracy. In this appeal, Becton challenges (1) the District Court’s denial of his motion to suppress evidence obtained from a series of wiretaps placed on his and his charged coconspirators’ cell phones; (2) the District Court’s refusal to hold a hearing pursuant to
Franks v. Delaware,
We affirm the District Court’s rulings. First, we hold that the District Court did not abuse its discretion in approving the prosecution’s use of wiretaps to uncover the “full nature and scope” of the conspiracy.
See United States v. Sobamowo,
I. Background
In 2001, the FBI began investigating drug trafficking on the 4200 and 4300 blоcks of Fourth Street, S.E., in Washington, D.C. According to the Government, appellant James Becton and his brother Willie Best led a “violent, narcotics trafficking organization,” Counts Aff. ¶ 15 (Oct.2005), reprinted in 1 Appendix to Brief of Appellant Becton (“A.A.”) 327 (“Counts Oct. Aff.”), supplying large quantities of drugs (primarily cocaine, crack, and marijuana) to their underlings and overseeing the drug sales that occurred in this area. Although the Government’s investigation slowed due to “staffing and *592 resource changes at the FBI” after the last of a series of controlled purchases occurred in June 2002, the investigation “resumed in earnest in 2004.” Government’s Omnibus Resp. to Def. James Becton’s Pretrial Mots, at 5-6 (May 30, 2008), reprinted in 1 A.A. 152-53. Among other endeavors, the Government seized crack cocaine from a car parked by Best and an associate in Washington, D.C.; obtained a pen register for the cellular telephone of Fred Mercer, a member of Becton and Best’s organization; executed a controlled buy using an informant; and recorded several telephone conversations between Mercer and the informant.
On September 27, 2005, the FBI sought and оbtained authorization to wiretap Mercer’s cellular telephone. Agent Mary Counts submitted a 49-page affidavit seeking to intercept wire communications to and from this telephone by a number of purported conspirators, including Becton. See Counts Aff. (Sept.2005), reprinted in 1 A.A. 260-308 (“Counts Sept. Aff.”). Counts’ affidavit provided detailed information about Best and Becton’s operation as revealed by three confidential informants, identified as S-l, S-2, and S-3 to protect the sources from retribution. Two of these informants were incarcerated at the time Counts applied for the wiretap. Counts additionally described several seizures and undercover operations that took place in 2003 and 2005 and set forth data obtained pursuant to a pen register for the targeted telephone.
In the September 2005 affidavit, Counts stated her belief that “the interception of wire communications” was the “only available investigative technique ... to establish the full scope and nature” of the conspiracy. Counts Sept. Aff. ¶ 68, 1 A.A. 296. She averred that “[n]ormal investigative procedures” had been tried and “failed, appear[ed] reasonably unlikely to succeed if tried or continued, or [were] too dangerous to employ.” Id. ¶ 69, 1 A.A. 296. Athough the FBI had employed surveillance, undercover officers, confidential sources, interviews and pen registers, made controlled purchases through cooperating witnesses, and reviewed calling data and public records, Counts averred that these investigative techniques had failed to establish, inter alia, the identities of the persons who supplied the cocaine and crack cocaine, the identities of the persons who transported drugs into the District of Columbia for distribution by the identified co-conspirators, the identities of other persons who assisted with the distribution of the drugs, the manner and frequency with which the co-conspirators transported drugs into D.C., and the locations where they stored their contraband. Id. ¶ 69, 1 A.A. 296-97. Counts explained in detail the conventional investigative techniques employed, the evidence (or lack thereof) revealed by each method, and why further use of each technique would not reveal the identity of all members of the conspiracy, the manner in which the co-conspirators distributed drugs, or the manner in which they distributed the proceeds of their operation. For example, three previous search warrants yielded “limited to no evidence,” as sources later revealed that Best and Becton had been forewarned that law enforcement action would take place at certain locations and moved their contraband. Id. ¶ 76, 1 A.A. 301-02.
From the September 2005 wiretap of Mercer’s phone, the FBI identified a cellular telephone number for Bectоn and obtained authorization to wiretap this phone from October 27, 2005 to November 25, 2005. Ater a second wiretap of Mercer’s phone revealed a telephone number for Willie Best, the FBI applied for and received authorization in January 2006 to wiretap Best’s phone for 30 days, later reauthorized for a second 30-day period. *593 In the January 2006 application for a wiretap on Best’s phone, Counts’ affidavit described six confidential sources. See Counts Aff. ¶¶ 21-59 (Jan.2006), reprinted in 1 A.A. 199-210 (“Counts Jan. Aff.”). The three confidential sources that had not appearеd in previous wiretap applications were stated to have begun their cooperation with the FBI in March 2005(SM), November 1996(S — 5), and April 2002(S-6), and were thus working with the FBI at the time it applied for the first wiretap in September 2005. However, all three sources were incarcerated at the time the initial wiretap application was made. After obtaining these six wiretap authorizations, the FBI executed a series of search warrants on May 22, 2006 and May 23, 2007, the latter being the date of the case “take down.” Government’s Notice of Intrinsic Evidence at 4 (Apr. 18, 2008), reprinted in 1 A.A. 91.
A grand jury charged Becton and ten others with conspiracy to unlawfully, knowingly, and intentionally distribute and possess with intent to distribute (1) fifty grams or more of crack; (2) five kilograms or more of cocaine; and (3) cannabis. Becton was also charged with numerous counts relating to the unlawful use of a telephone to facilitate the conspiracy in violation of 21 U.S.C. § 843(b) and 18 U.S.C. § 2. Charged co-conspirator Willie Best moved to suppress evidence obtained from the six 30-day periods of wiretap surveillance authorized on September 27, 2005 (Mercer’s phone); October 27, 2005 (Becton’s phone); December 16, 2005 (second wiretap of Mercer’s phone); January 27, 2006 (Best’s phone); February 24, 2006 (second wiretap of Best’s phone); and April 4, 2006 (three additional phones used by Becton). Among other arguments, Best claimed that the Government’s wiretap applications had not satisfied the necessity threshold of 18 U.S.C. § 2518, and asked for a
Franks v. Delaware
hearing,
see
Becton’s trial proceeded from September 15, 2008 to September 30, 2008. The jury found Becton guilty of conspiracy and ten counts of unlawful use of a telephone to facilitate the conspiracy in violation of 21 U.S.C. § 843(b) and 18 U.S.C. § 2. It acquitted Becton of several other telephone counts.
Becton moved for a new trial, arguing that the District Court (1) improperly admitted the prosecution’s evidence of his actions while he was incarcerated from 2003 to 2005, including his receipt of drugs and a cell phone while at the correctional facility, and (2) improperly permitted the prosecution in its rebuttal closing argument to inform the jury that Becton was incarcerated between 1995 and 2000. The District Court denied the motion, finding that Becton’s activities while incarcerated were “relevant to the existence and/or continuing operation of the charged conspiracy and probative of Becton’s participation in it.” United States v. Becton, Crim. No. 07-0131, Memorandum Order at 6 (D.D.C. Feb. 11, 2009), reprinted in 1 A.A. 421 (“Mem.Order”). The District Court ruled that “[t]his was not Rule 404(b) evidence; it was evidence intrinsic of the conspiracy,” because the testimony established that even during his incarceration, Becton exerted significant influence and control over the drug sales business , on Fourth Street S.E., and established the beginning of a long-term drug-dealing relationship between Becton and one of the witnesses. Id. The District Court further found that *594 the probative value of this evidence was not substantially outweighed by the danger of unfair prejudice. Id. at 7, 1 A.A. 422. The District Court found that it had erred in permitting the Government’s reference to Becton’s 1995 to 2000 incarceration in rebuttal closing argument, but held that the error was harmless. Id. at 10-12, 1 A.A. 425-27.
Becton appeals his conviction, challenging the District Court’s denial of his motion for a new trial as well as its earlier denial of his motion to suppress evidence obtained through wiretaps.
II. Analysis
A. Standard of Review
This court reviews the District Court’s determination that the Government adequately demonstrated necessity to wiretap for abuse of discretion.
Sobamowo,
“The circuits are split on the question whether a district court’s decision not to hold a
Franks
hearing is reviewed under the clearly erroneous or
de novo
standard of review.”
United States v. Dale,
We review the denial of a motion for a new trial for abuse of discretion.
See Morgan v. District of Columbia,
Federal Rule of Evidence 401 defines “[rjelevant evidence” as “evidence having any tendency to make the existence of any fact that is of consequence to the determination of the action more probable or less probable than it would be without the evidence.” Fed.R.Evid. 401. District Court determinations on relevancy are reviewed for an abuse of discretion.
United States v. Askew,
Federal Rule of Evidence 404(b) states:
Evidence of other crimеs, wrongs, or acts is not admissible to prove the character of a person in order to show action in conformity therewith. It may, however, be admissible for other purposes, such as proof of motive, opportunity, intent, preparation, plan, knowledge, identity, or absence of mistake or accident, provided that upon request by the accused, the prosecution in a criminal *595 case shall provide reasonable notice in advance of trial, or during trial if the court excuses pretrial notice on good сause shown, of the general nature of any such evidence it intends to introduce at trial.
Fed.R.Evid. 404(b). A claim that a district court improperly admitted evidence under Rule 404(b) is ordinarily reviewed for abuse of discretion.
United States v. Pettiford,
Finally, “even where challenges to a prosecutor’s closing argument have been preserved through timely objection, we will reverse a conviction and require a new trial only if we determine that the defendant has suffered substantial prejudice.”
Childress,
B. The Motion to Suppress Evidenсe Obtained Through Wiretapping
Title III of the Omnibus Crime Control and Safe Streets Act of 1968, 18 U.S.C. § 2510 et seq., permits a district court to approve an application for the interception of certain wire, oral, or electronic communications. Id. § 2518. On the basis of facts submitted in the Government’s application to wiretap,
the district court may authorize a wiretap upon finding that (1) probable cause exists to believe that an individual has committed or is about to commit one of certain enumerated offenses; (2) probable cause exists to believe that “particular communications concerning that offense will be obtained” through an interception; (3) “normal investigative procedures have been tried and have failed or reasonably appear to be unlikely to succeed if tried”; and (4) probable cause exists to believe that the communication facility sought to be wiretapped “[is] being used, or [is] about to be used, in connection with the commission of [the] offense.”
United States v. Carter,
1. Necessity to Wiretap and Use of the Information Obtained
Appellant first argues that the District Court abused its discretion in finding that the Government satisfied the “necessity” requirement for wiretapping in its September 2005 application. In particular, he asserts that the Government (1) failed to exhaust conventional investigative techniques before seeking authorization to wiretap, and (2) failed to disclose three informants who were working with the Government when it submitted its first wiretap application. We find neither argument persuasive. We therefore hold that the District Court did not abuse its discretion in finding that the Government met the necessity requirement of Title III. See 18 U.S.C. § 2518(3)(c).
This court has previously held that the District Court may authorize a wiretap on the phone of a member of a suspect operation if traditional investigative techniques have proved inadequate to reveal the operation’s “ ‘full nature and scope.’ ”
See, e.g., Carter,
Counts’ affidavit stated that further controlled drug purchases, either by the one confidential informant not incarcerated or by an undercover officer, would not lead to sufficient evidence as to (1) the manner by which co-conspirators redistributed large quantities of illegal drugs in D.C.; (2) the identities of all members of the organization assisting Mercer, Becton, and the others; and (3) the manner in which the co-conspirators disposed of the proceeds of the operations. Counts Sept. Aff. ¶ 71, 1 A.A. 298-99. Specifically, the affidavit stated that even if S-l, the unincarcerated informant, made additional controlled buys, S-l would not be able to find out the organization’s source of supply. Id.
*597
We disagree with Becton’s claim that various omissions from the wiretap affidavits undermined the Government’s necessity showing. The Government’s omission of information that a previous search had yielded incriminating information did not make its affidavit infirm. The affidavit explained in detail why searches were “inadequate to penetrate [the] conspiracy,” so the contested information was not material.
Carter,
The disputed omission of three cooperating witnesses from the Government’s first affidavit was not material, because it did not “undermine the government’s ability to prove the need for the ... wiretap.”
United States v. Gonzalez, Inc.,
Becton also asserts that the evidence gained from these wiretaps should have been disregarded for failure to meet the necessity requirement and that the later affidavits do not support probable cause without that information. See Appellant’s Br. at 52. For the reasons аlready explained, the District Court did not abuse its discretion in authorizing the September and October wiretaps, so the information from those wiretaps need not have been disregarded.
Because the Government’s affidavits adequately demonstrated the failure of normal investigative techniques to reveal the full nature and scope of the conspiracy, the District Court did not abuse its discretion in finding that the Government had met the necessity requirement of 18 U.S.C. § 2518.
2. Denial of a Franks Hearing
Becton also argues that the District Court erred when it refused to grant a
Franks
hearing with respеct to the Government’s failure to disclose certain information bearing on the credibility of two confidential sources, S-4 and S-6, who were cited in the January and February 2006 affidavits supporting wiretap applications.
See
Appellant’s Br. at 52-54. We agree with Becton that his claim was raised and preserved when he requested a
Franks
hearing as part of the motion to suppress and the District Court denied that motion without holding such a hearing. However, because Becton failed to demonstrate that the omitted information was material, we hold that the District Court did not err in failing to hold a
Franks
hearing.
See Franks,
The inclusion of additional information bearing on the credibility of S-4 and S-6 would not have “defeated] probable cause” for the wiretap.
See United States v. Spencer,
On this record, we hold that the District Court did not err when it refused to grant a Franks hearing.
C. The Motion for a New Trial
Finally, the District Court did not abuse its discretion in denying Becton’s motion for a new trial. Becton argues that testimony pertaining to his conduct while incarcerated from 2003 to 2005 on an unrelated offense should have been excluded as inadmissible character evidence under Federal Rule of Evidence 404(b). We disagree. The District Court correctly held that this “was not Rule 404(b) evidence.”
See
Mem. Order at 6, 1 A.A. 421. Rather, the evidence that Becton continued to manage the drug operation on Fourth Street S.E. while incarcerated constitutes direct evidence of his continuing partiсipation in the charged conspiracy and is therefore “properly considered intrinsic” evidence outside the scope of Rule 404(b).
See Bowie,
The District Court additionally did not abuse its discretion in determining that “the danger of unfair prejudice” did not “substantially outweigh!]” the probative value of the disputed evidence. Fed. R.Evid. 403; see Mem. Order at 7, 1 A.A. 422. Both the prosecution and the defense at other points in the trial had mentioned without objection that Becton had been previously incarcerated. Mem. Order at 7, 1 A.A. 422. Because the District Court did not abuse its discretiоn in admitting this testimony, it did not abuse its discretion in denying the motion for a new trial.
Nor did the District Court abuse its discretion in denying the motion for a new trial after Becton challenged the prosecutor’s rebuttal closing argument reference to Becton’s incarceration from 1995 to 2000. The challenged remark was error, as the District Court found,
see
Mem. Order at 10, 1 A.A. 425, because “it constituted a statement of fact to the jury not supported by proper evidence introduced during trial,”
United States v. Gartmon,
The District Court properly applied the three factors used to determine whether improper remarks by the prosecutor sufficiently prejudice a defendant so as to warrant reversal: (1) the closeness of the case; (2) the centrality of the issue affected by the error; and (3) the steps taken to mitigate the error’s effects.
See Childress,
III. Conclusion
For the foregoing reasons, the judgment of the District Court is affirmed.
