This case involves a large drug trafficking organization that imported cocaine from Colombia and distributed it in Puerto Rico and New York from 1986 until 1990. In April 1991, as the climax of a lengthy investigation, a federal grand jury returned a thirty-four count superseding indictment charging defendant-appellant-Eusebio Escobar-de Jesús (“Escobar”) and seventeen other individuals not parties to this appeal with various drug-related offenses. In April 1993, a jury convicted Escobar of sixteen drug, assault, and weapons-related counts, including Count 1, engaging in a continuing criminal enterprise in violation of 21 U.S.C. § 848(a)
&
(c), and Count 12, causing an intentional killing while engaged in a continuing crimi
*157
nal enterprise in violation of 21 U.S.C. § 848(e).
1
This appeal followed, the disposition of which was deferred pending the Supreme Court’s decision in
Richardson v. United States,
- U.S. -,
I. Background
We recite the facts in the light most favorable to the verdicts, consistent with support in the record.
See United States v. Rodriguez,
The March 26, 1986 Lajas Incident
Largely through the testimony of cooperating co-defendant Edwin Soto-Osorio (“Soto”), the government established that on March 26, 1986, Escobar directed Soto and co-defendants Florentino Rivera-Moji-ca (“Rivera”) and Antonio Santos-Carabal-lo (“Santos”) to accompany him to a dirt road in the middle of a sugar cane field in Lajas to meet a plane containing cocaine from Colombia. To demarcate the makeshift landing strip, the men placed white lights along the beginning of the road and yellow lights along the end of the road. The lights were powered by a car battery. After the plane crash-landed, the four men and several other individuals associated with Escobar retrieved much of the plane’s drug cargo and transported it to nearby Loiza. Following the departure of Esco-bar and his associates, law enforcement officers arrived at the scene of the crash and discovered cocaine in the plane.
The April 14, 1986 Shooting of Customs Agents
On April 14, 1986, co-defendant Eric Flores-Rivera (“Flores”) drove a yellow truck to the Isla Grande airport and obtained more than one hundred gallons of aviation gasoline. Surveilling agents then observed Flores drive the yellow truck into the Potrero Cuevas Farm (“the farm”) near Carolina. An agent also observed a blue truck driven by co-defendant Andrés Morales-Cruz (“Morales”) enter the farm. Waiting outside the farm, agents heard a plane flying overhead. Shortly thereafter, agents observed the yellow truck, a white van, and a blue truck driven by Escobar and carrying six passengers (four dressed in camouflage) leave the farm. Two of the surveilling agents followed the white van to a nearby town, where the van suddenly reversed direction and its occupants opened fire on the agents. Both agents were seriously wounded.
*158 In the days following the shootings, agents searched the vicinity of the farm and discovered a clandestine landing strip made of dirt. They also found, inter alia, twenty heavy-duty lamps that had been purchased by Escobar, batteries, and a string that had been stretched along the makeshift landing strip. Escobar’s fingerprints were on one of the lamps, and more than sixty gallons of the aviation fuel which had been brought to the farm by Flores were gone. Agents found the white van used in the shooting in the Loiza River on April 16.
The November 1989 Intercepted Cocaine Shipment
In 1989 federal authorities began an investigation of Escobar that included court-ordered electronic surveillance and the use of a confidential informant named William Cedrés. In order to infiltrate Escobar’s organization, Cedrés began managing a Loiza grocery store and bakery, and, through his acquaintances with co-defendants Rivera and Héctor Ríos-Velásquez (“Rios”), was introduced to Escobar. Through his infiltration of Escobar’s organization, Cedrés learned that Escobar directed an organization of at least fourteen • members. 2
In early November 1989, Escobar and Rivera made plans to deliver a shipment of cocaine from Puerto Rico to New York on a commercial airlines flight. Cedrés expressed interest in participating in the delivery, and Escobar agreed. On November 21, co-defendant Fernando Fac-cio-Laboy (“Faccio”) delivered eighty kilograms of cocaine to Escobar, who in turn delivered the cocaine to Cedrés in five suitcases. Rivera and Cedrés placed official - inspection seals from the United States Department of Agriculture on the five suitcases and presented them at the check-in counter at the airport. Rivera and Cedrés boarded the flight, but the suitcases were seized upon arrival in New York by federal authorities. Rivera called Escobar in Puerto Rico to report the situation. 3 Escobar later met with Faccio and a representative of the Ochoa family, part of Colombia’s Medellin cartel, to discuss the lost cocaine.
December 1989: Planning for Future Importations
In December 1989 Escobar began to plan additional importations of cocaine from Colombia to Puerto Rico. On December 9 and December 13, Escobar and several subordinates traveled to Vieques, Puerto Rico, to inspect potential sites for clandestine airstrips to use in importing approximately 1,500 kilograms of cocaine from the Medellin and Cali cartels in Colombia. On or about December 20, Esco-bar and his subordinates also discussed the possibility of using a plane to drop the cocaine into the ocean near Guánica, where it would be picked up by speedboats directed by co-defendants Soto and Santos. During the month of December 1989 Esco-bar also discussed cocaine importation with José Alberto Ochoa-Vasco (“Ochoa”), a representative of the Medellin cartel.
The Murder of Martín Mdtos-Cruz
According to Cedrés’s testimony, in December 1989 Escobar asked him to kill Martín Matos-Cruz (“Matos”), who was the third-ranking member of Escobar’s organization and had fallen out of favor with Escobar. On January 2, 1990, however, Escobar told Cedrés that he had found another person, co-defendant Michael Cruz-González (“Cruz”), to kill Matos. The same day, Escobar and Cruz traveled to Carolina to identify Matos’s residence, *159 and on January 3, according to Cedrés’s testimony, Cruz shot and killed Matos outside Matos’s residence. 4 On January 5, at Escobar’s request, Cedrés gave Cruz $1,500 as a partial payment for the murder.
The March 1990 Attempted Importation
Throughout January and February 1990, Escobar and his confederates continued to plan drug importations, meeting at least fifteen times to discuss the logistics of the effort. Between March 5 and March 13, Escobar was in repeated telephone contact with several individuals, including Soto, regarding an anticipated cocaine delivery. On March 13, Escobar and his men attempted to import 320 kilograms of cocaine by air, but the flight was intercepted by Coast Guard and Customs Service aircraft, causing it to break off and return to Colombia.
Following this aborted importation, Es-cobar and his confederates continued to meet during March and April to discuss other ways to successfully import cocaine to Puerto Rico. On April 2, Mesa informed Escobar by telephone that a shipment of cocaine was ready for delivery and that he should arrange to receive it. Shortly thereafter, however, Escobar entered a drug rehabilitation program in order to avoid revocation of his parole. Cedrés replaced him in meetings with representatives of the Medellin and Cali cartels, and kept Escobar informed of developments. On April 8, Cedrés and Flores met Esco-bar at the drug rehabilitation facility to discuss arrangements for the importation. Before the importation could be executed, however, Escobar was arrested.
II. The Jury Instructions
A. Continuing Criminal Enterprise
Section 848, often referred to as the “kingpin” statute, makes it a crime to engage in a “continuing criminal enterprise.” The statute provides:
[A] person is engaged in a continuing criminal enterprise if-
(1) he violates any provision of [the federal drug laws, i.e.,] this subchap-ter or subchapter II of this chapter the punishment for which is a felony, and
(2) such violation is part of a continuing series of violations of [the federal drug laws, i.e.,] this subchapter or subchapter II of this chapter -
(A) which are undertaken by such person in concert with five or more other persons with respect to whom such person occupies a position of organizer [or supervisor or manager] and
(B) from which such person obtains substantial income or resources.
21 U.S.C. § 848(c). In this case, the jury convicted Escobar of Count 1, charging that he had engaged in a continuing criminal enterprise (“CCE”) from on or about April 1986 until the date the indictment was filed, in violation of 21 U.S.C. § 848(a) & (c); and of Count 12, charging that he had caused the killing of Martín Matos-Cruz while engaged in the CCE, in violation of 21 U.S.C. § 848(e)(1)(A). 5
On appeal Escobar argues that the district court erred in failing to grant his proposal to instruct the jurors that, in
*160
order to convict under section 848, they must agree unanimously on which underlying violations — of the ten alleged
6
— constituted the three related violations necessary to establish a “continuing series.”
7
See United States v. Chagra,
In
Richardson v. United States,
- U.S. -,
Relying on considerations of language, tradition, and potential unfairness, the Supreme Court rejected the notion that the "violations" referred to in section 848 are simply fungible means of satisfying the "series" element of section 848. See id. at 1709-13. Rather, the Court held that those "violations" are themselves elements of the offense, meaning that jury unanimity in respect to each individual violation is necessary. See id. Accordingly, in cases where the government introduces evidence that the defendant has committed more underlying drug crimes than legally necessary to make up a "series," Richardson requires that they agree unanimously about which crimes make up the continuing series. See id. at 1709.
In light of Richardson, the government concedes that the district court erred by failing to instruct the jurors that the "violations" are themselves elements of the CCE offense and that they therefore must agree unanimously about which three (or more) drug crimes the defendant committed. The government argues, however, that the court's error was harmless because the jury separately convicted Escobar of Counts 10, 19, 20, 23, 24, and 33, which were six of the ten predicate offenses alleged to constitute the series. See supra note 6. Thus, the government observes, the jurors must have unanimously agreed that Escobar committed six of the alleged violations, which was more than enough to constitute a "series." See Chagra,
We have previously recognized that some uncertainty exists about whether a jury instruction that misdefines or omits an element of the offense charged is susceptible to harmless error review. See United States v. Marder,
In this case, the jury’s decision to convict Escobar on Counts 10, 19, 20, 23, 24, and 33 — which were alleged to be predicate violations supporting the CCE count — necessarily establishes that the jurors agreed unanimously that he was guilty of those offenses. This decision ensures that the concern at the core of the Richardson decision — namely, that jurors might convict a defendant of a CCE on the basis of violations for which there was non-unanimity — is not present. The guilty verdicts on Counts 10, 19, 20, 23, 24, and 33 are tantamount to the jury having found that he committed each of these violations for the purposes of the CCE count.
That is not the end of the matter, however. Section 848 also requires that jurors agree that the “series” of violations be “continuing” in nature — that is, that they be related to each other in some way.
See United States v. Edmonds,
The evidence introduced to support the separate convictions on those counts also establishes inescapably their relatedness. The counts involved Escobar’s ongoing and persistent efforts to import and distribute cocaine over a finite period of time in late 1989 and early 1990. After the failed importation attempt in late 1989 (Count 10), Escobar re-grouped and tried again in March 1990 (Counts 19, 20, 23, and 24). After failing once again in March, he began planning for another attempt in April 1990 (Count 33). The relatedness of the counts is demonstrated by their proximity in time and- identity of purpose, and we conclude beyond a reasonable doubt that the jury, had it been properly instructed, would have found that the counts were “continuing” in nature.
See id.
at 825;
United States v. King,
*163 B. The Telephone Facilitation Counts
Escobar also argues that the district court erred in its instructions to the jury on three telephone facilitation counts, which charged him with using a telephone in facilitating the importation of cocaine in violation of 21 U.S.C. § 843(b).
9
Specifically, Escobar contends that the district court should have expressly instructed the jury that in order to convict under section 843(b), it had to find that the underlying drug offenses alleged to have been facilitated by his telephone use — namely, the importations — were actually committed. Because Escobar did not object to the district court’s instructions during the trial and raises this issue for the first time on appeal, we review only for- plain error.
See
Fed.R.Crim.P. 52(b);
Johnson v. United States,
The federal courts have uniformly held that, to obtain a conviction on a charge of telephone facilitation pursuant to section 843, the government must prove commission of the underlying offense.
See United States v. Iennaco,
Although the language of section 843(b) itself arguably conveys without any need for elaboration the .requirement of a jury finding that the underlying drug offense
*164
was committed, we agree that an instruction would have clarified any potential ambiguity in section 843(b)’s language on that point.
See id.
at 264. However, given the scarcity of authority mandating such an instruction, combined with the nature of the alleged instructional error,
10
we cannot conclude that any error in the court’s instructions was “plain,”
see Olano,
III. The Jury Selection
We next consider Escobar’s
Batson-based
claim that his convictions must be vacated because of deficiencies in the jury selection process.
See Batson v. Kentucky,
The three-part framework that must be applied to equal protection challenges to the government’s use of a peremptory strike is well established. First, a defendant must make a prima facie showing of discrimination in the government’s use of its peremptory strike.
See Batson,
Although the prima facie case requirement “is not onerous, neither can it be taken for granted.”
Bergodere,
Although it is true that a “pattern” of strikes against African-Americans is one circumstance which may raise an inference of discrimination, see
Batson,
Alternatively, Escobar points out that during voir dire he proposed that the district court ask potential jurors ques.tions related to racial bias, which he argued were necessary because Escobar is African-American and because “there is racism in Puerto Rico.” The court denied the request, reasoning that there was no indication that racial animosity or racial motive was an issue in the case. Escobar now claims that the court’s refusal to question jurors about their potential racial bias hindered his later efforts to establish a prima facie case of discriminatory intent in the government’s use of its peremptory strikes to remove the two African-American men during the jury selection process.
To the extent that Escobar does in fact challenge directly the court’s denial of his request to question potential jurors about racial prejudice (and it is unclear whether he makes this challenge), we find that the voir dire conducted in this case was sufficient. While the Supreme Court has held that under certain circumstances the possibility of racial prejudice makes special voir dire questioning constitutionally mandated,
see Turner v. Murray,
Furthermore, we fail to perceive how the district court’s refusal to question jurors about racial bias impeded Escobar’s ability to establish a prima facie case of discrimination in the government’s use of its peremptory strikes, and Escobar does not adequately explain the connection. Even if the court had granted Escobar’s request to question potential jurors about racial bias, such questioning would have revealed only the potential jurors ’ racial biases, enabling either party to remove prejudiced jurors- for cause. We do not see how such questioning could have shed light on the government’s allegedly improper motives for exercising its peremptory strikes, evidence of which was lacking in Escobar’s efforts to establish a prima facie case under Batson..
Finally, Escobar challenges the constitutionality of 28 U.S.C. § 1865(b)(2) & (3), which require that jurors be able to speak the English language and be able to read, write, and understand the English language with a degree of proficiency sufficient to fill out satisfactorily the juror qualification form. Having previously considered and rejected this contention,
see United States v. Flores-Rivera,
IV. Prosecutorial Misconduct
Escobar claims that cooperating co-defendant Soto’s testimony created a false impression about the extent to which Soto could benefit from pleading guilty and testifying for the government, and that the prosecutor’s failure to correct this misleading testimony resulted in reversible error. We find nothing false or misleading about Soto’s testimony.
Before Escobar’s trial, Soto entered into a plea agreement which provided, inter alia, that he would plead guilty to a drug conspiracy count; that he understood that he may be sentenced to a term of imprisonment not less than ten years; that he acknowledged that the government could move the court to impose a sentence below the sentencing range dictated by the sentencing guidelines based on his substantial assistance; and that if he fully complied with the agreement, the government would not prosecute him for other drug crimes resulting from information provided by him and that the government would move to dismiss the remaining charges against him.
During the trial, Escobar’s defense counsel cross-examined Soto about the plea agreement, asking inter alia whether Soto was aware that the government had the discretion to move the court to impose a sentence of less than ten years. Soto responded that he was not aware of this; that he expected to receive a sentence of eight to ten years instead of the thirty years to life which would have been imposed if he had not entered into the plea agreement; and that he had discussed the plea agreement with his attorney only in a “overall way” and not “part by part.” Es-cobar now claims reversible error based on Soto’s failure to disclose that the government could move the court to impose a *167 sentence below the statutory minimum and the government’s silence on the matter.
It is true, of course, that the government may not knowingly use false testimony to obtain a conviction, even if the false testimony goes only to a witness’s credibility.
See Napue v. Illinois,
V. Evidentiary Matters
A. The March 26,1986 Lajas Incident
Escobar argues that the court erred by allowing the introduction of evidence, including the testimony of co-operating co-defendant Soto, concerning the March 26, 1986 airdrop at Lajas (“the Lajas incident”). Escobar characterizes the Lajas incident as evidence of a prior bad act, and contends that the district court erred by concluding that it was admissible under Fed.R.Evid. 404(b) as proof of the Escobar organization’s modus operandi, or, alternatively, as proof of the knowledge and intent of the organization’s members to carry out a major drug trafficking scheme. 14
The district court’s pre-trial order denying Escobar’s motion
in limine,
however, did not premise the admissibility of the Lajas incident evidence solely on Rule 404(b) grounds. Rather, the court also ruled that the Lajas incident evidence was not “prior bad act” evidence at all, as the incident fell within the temporal scope of the conspiracy alleged in the indictment and pertained to the same conspiracy alleged in the indictment.
15
Because we agree with the latter theory of admissibility, we need not address the district court’s
*168
determination that the evidence was admissible under Rule 404(b).
See United States v. Arboleda,
The indictment alleged that the conspiracy began “on or about April 1986.” The Lajas incident occurred on March 26, 1986.' Given the closeness in time of the Lajas incident to April 1986, we have little difficulty concluding that the Lajas incident is fairly encompassed by the temporal scope of the conspiracy alleged in the indictment.
See United States v. Paredes-Rodriguez,
B. The 1988 Heroin Purchase
At trial, cooperating co-defendant Rosa Rodríguez-Campos (“Rodríguez”) testified pursuant to a plea agreement that she was a long-time drug trafficker and that in 1990 she agreed to loan Escobar money to finance his importation of cocaine from Colombia to Puerto Rico. As part of its direct examination of Rodriguez concerning her role in the alleged conspiracy, the government sought to introduce her testimony that Escobar purchased $90,000 worth of heroin from her in 1988. 18 The district court allowed Rodriguez to testify that Escobar had purchased heroin *169 from her, reasoning that the heroin purchase, although uncharged in the indictment, was relevant and admissible because it helped to explain the history between Rodríguez and Escobar and her willingness to finance Escobar’s cocaine trafficking venture. 19 Escobar claims that the district court erred by admitting this testimony concerning the heroin transaction, arguing that it was outside the scope of the charged conspiracy (which pertained only to cocaine, not heroin) and that it was elicited solely for the purpose of showing his propensity to commit drug crimes in violation of Fed.R.Evid. 404(b).
Evidence that a defendant on trial for one crime has been involved in another crime or bad act is inadmissible under Fed.R.Evid. 404(b) if it is offered solely to prove the criminal character of the defendant or his propensity to commit crimes of the sort for which he is on trial.
See United States v. Frankhauser,
In a conspiracy case, evidence of other bad acts, subject always to the requirements of Rule 403, can be admitted to explain the background, formation, and development of the illegal relationship,
see United States v. Prevatte,
Moreover, the potential of prejudice from the heroin purchase evidence, although undeniably present in some quantum, did not substantially outweigh its probative value. Rodriguez’s testimony regarding the heroin purchase, although brief, was critical to set the stage for the rest of her testimony concerning the formation, nature, and extent of her conspiratorial relationship with Escobar, and it represented only a tiny fraction of the incriminating evidence presented to the jury during the course of the trial. 20 In *170 these circumstances, we find no abuse of discretion in the district court’s decision to admit the challenged testimony. 21
C. The Wiretap Evidence
Escobar challenges the district court’s denial of his motion to suppress evidence derived from intercepted telephone communications, which he says violated Title III of the Omnibus Crime Control and Safe Streets Act of 1968, 18 U.S.C. §§ 2510-2522.
In March 1990 the district court issued a wiretap order authorizing the interception of communications on telephone line 809-256-2600, which was installed at Esco-bar’s business, Sueño Real Construction Company (“Sueño Real”). According to the district court’s findings (which are not challenged on appeal), Escobar broke the telephone’s receiver in February or March 1990 and refused to pay the telephone bills after becoming upset that people had used the Sueño Real telephone to make long-distance phone calls. Cedrés thereafter “extended a phone line” to Cedrés’s grocery business, Colmado El Coqui, which was adjacent to Sueño Real, and paid the phone bills to keep the line in service. Escobar knew that Cedrés had extended the phone line, and in fact used the extension line in Colmado El Coqui himself on several occasions.
Escobar argues that the intercepted communications must be suppressed because they occurred at Colmado El Coqui, rather than at the location specified in the wiretap order, Sueño Real. To support this contention Escobar relies on 18 U.S.C. § 2518(4), which provides that the order authorizing an interception specify five items, including “the nature and location of the communications facilities as to which, or the place where, authority to intercept is granted.” 18 U.S.C. § 2518(4)(b). 22 The order’s authorization, he argues, was limited to the telephone line at issue, which in turn was limited to the confines of Sueño Real.
We agree that by its terms the order authorized interception of conversations occurring on the telephone line denominated 809-256-2600, which was located in Sueño Real. We find nothing in the statute, however, that requires the wiretap order to have identified the particular locations of various extensions of that telephone line, nor does Escobar cite any authority for that proposition. The telephone line remained located in Sueño Real, as provided in the wiretap order, even though it had apparently been rigged with a long extension cord to enable a person to access the line from a remote location (ie., the adjacent Colmado El Coqui).
*171
Moreover, assuming arguendo that section 2518(4)(b) does require an order to identify the particular locations of various extensions of the same telephone line, it is well-settled that not every failure to comply fully with any requirement provided in Title III necessitates suppression.
See United States v. Cunningham,
VI. Variance
Escobar contends that his conviction on Count 20, charging him with attempted importation, must be reversed because of a fatal variance between the indictment and the evidence offered at trial. Count 20 of the indictment charged, inter alia, that the March 13, 1990 attempted importation took place “at Guayama, Puerto Rico, in the District of Puerto Rico, and elsewhere and within the jurisdiction of this Court.” At trial, informant Cedrés testified that the attempted importation took place “around the town of Guánica, that part of the southern coast of Puerto Rico.” Escobar moved to strike all evidence related to Count 20 because the *172 indictment referred to Guayama, not Guá-nica. Noting that both towns were in the southern part of Puerto Rico and that they were “not that far apart,” the district court denied the motion.
A variance arises when the proof at trial depicts a scenario that differs materially from the scenario limned in the indictment.
See United States v. Paredes-Rodriguez,
We note preliminarily our reluctance to characterize what happened here as a variance at all, given the breadth of the indictment’s description of the physical location of the attempted importation (“Guayama, Puerto Rico, in the District of Puerto Rico, and elsewhere and within the jurisdiction of this Court”) and the ambiguity of Cedrés’s testimony (namely, that the attempted importation took place “around the town of Guánica, that part of the southern coast of Puerto Rico”). In any event, whatever discrepancy may have existed between the indictment and the evidence adduced at trial was neither material nor prejudicial. The location of the attempted importation was not an element of the crime; both towns are in southern Puerto Rico, and are within the district court’s jurisdiction; and Escobar does not contend that the indictment’s allegations caused him to be misinformed of the charges against him. In his closing argument to the jury, Escobar pointed out the purported variance and other evidence that he considered to be contradictory. It was the jury’s province to resolve any conflicts in the evidence about the attempted importation,
see United States v. Angiulo,
VII. Sufficiency of the Evidence
Escobar challenges the sufficiency of the evidence supporting his convictions on the CCE counts (counts 1 and 12); the assault counts (counts 5 and 6); the weapons counts (counts 7, 15, 16); and one interstate travel count (count 18). In considering his sufficiency challenges, we must take the evidence in a light most favorable to the verdicts, drawing all plausible inferences and resolving all credibility determinations in their favor.
See United States v. David,
A. Continuing Criminal Enterprise
A conviction under 21 U.S.C. § 848 for engaging- in a CCE requires proof that the defendant (1) committed a felony drug offense, (2) as part of a continuing series of such violations, (3) in concert with five or more persons in relation to whom he acted as a supervisor, organizer, or manager, (4) and from which he obtained substantial income or other resources. 21 U.S.C. § 848;
see United States v. Hahn,
As to the second element, Escobar contends (1) that the evidence did not establish that the alleged violations were of a “continuing” nature — that is, that they were related to one another, and (2) that the counts related to the 1990 planned importations cannot constitute predicate offenses under the CCE statute because those importations were too “inchoate and incomplete.” For the reasons previously set forth in part 11(A) supra, we find ample evidence of the relatedness of Counts 10,19, 20, 23, 24, and 33. Furthermore, we find nothing in section 848 that limits predicate offenses to successful, completed drug importations in the manner suggested by Escobar. See 21 U.S.C. § 848 (predicate offenses may consist of “violations of [subchapter I] or subchapter II of [chapter 13] ”).
Turning to the third element under the CCE statute, Escobar argues that the government failed to prove that he “oceupie[d] a position of organizer, a supervisory position, or any other position of management,” 21 U.S.C. § 848, with respect to at least five individuals. In determining whether a defendant organized, supervised, or managed a criminal enterprise, we give those terms their ordinary meaning.
See David,
In this case, Escobar does not expressly dispute that he acted as an organizer, supervisor, or manager with respect to four individuals. Indeed, there is ample evidence in the record that Escobar acted in such capacity with respect to co-defendant Soto in the March 5, Í990, telephone offense (Count 19); with respect to Santos in the March 13, 1990 telephone offense (Count 20); and with respect to co-defendants Ismael Santiago-Corujo (“Santiago”) and Flores during the conspiracy offense in connection with the April 1990 plans to import cocaine by sea (Count 2). 24 Escobar does dispute, however, that he acted as an organizer, supervisor, or manager with respect to a fifth individual, co-defendant Rivera, during the November 21, 1989, *174 drug offense. Specifically, he contends that the evidence showed that he had only “an interest” in the transaction, given that Faccio, not he, was the original owner of the cocaine. 25
To be an organizer, supervisor or manager within the meaning of 21 U.S.C. § 848, however, the defendant “need not be the dominant organizer or manager of the enterprise; he need only occupy some managerial position with respect to five or more persons.”
Rodriguez,
Finally, Escobar contends that the government failed to prove that he obtained substantial income or other resources from the CCE. The substantial income requirement is meant “to exclude trivial amounts derived from occasional drug sales,”
Hahn,
B. Assaults on the Customs Officers
Escobar argues that the court erred in instructing the jury that it could convict on counts 5 and 6 (charging him with the April 14, 1986 shootings of the customs officers) on the basis of Pinkerton liability, 26 as there was insufficient evidence to establish his participation in a conspiracy on that date. Specifically, Es- *175 cobar contends that the absence of any direct evidence of an importation actually having occurred on April 14th made it impossible for any rational factfinder to conclude that a conspiracy existed; and that, in any event, the evidence established only his mere presence at the scene where some of the conspiratorial activities allegedly took place. 27 Without sufficient evidence of his participation in a conspiracy on the evening of April 14th, he argues, the Pinkerton instruction was improper.
To prove the elements of a conspiracy, the government must show beyond a reasonable doubt that the “defendant and one or more coconspirators intended to agree and ... to commit the substantive criminal offense which was the object of their unlawful agreement.”
United States v. Tejeda,
Applying these standards here, we conclude that there was sufficient evidence to support the
Pinkerton
charge. First, contrary to Escobar’s assertion, the fact that the government introduced no direct evidence of contraband having been imported by plane on April 14th does not preclude the jury from concluding that Escobar and his cohorts were engaged in a conspiracy to achieve such ends. Proof of the. conspiracy’s objective having been accomplished is not required to sustain a conspiracy conviction.
See David,
As to Escobar’s claim that the evidence established only his mere presence at the scene of the conspiratorial activities,
see, e.g., United States v. Ocampo,
C. The Weapons Charges
Escobar was charged in Count 7 with possessing a machine gun in violation of 18 U.S.C. § 922(o)(l).
29
In Counts 15 and 16, he was charged with possessing firearms as a convicted felon in violation of 18 U.S.C. § 922(g)(1).
30
With respect to both Counts 7 and 16, Escobar’s main contention is that the uncorroborated testimony of informant Cedrés concerning the weapons charges cannot suffice to support his convictions. Cedrés’s testimony, even if uncorroborated, was sufficient to support Escobar’s conviction because it was not “incredible or insubstantial on its face.”
United States v. Gomez-Pabon,
As to Count 16, charging him with possessing a firearm as a convicted felon, Escobar further contends that his possession of the firearm at issue was too brief to support a conviction. Cedrés testified that in January 1990 co-defendant Fernando Montañez-Bultrón (“Montañez”) gave the firearm to Escobar, and that at some point thereafter Escobar gave the firearm to Cedrés with instructions to keep it until Montañez and co-defendant Cruz asked for it. This testimony is sufficient. Even if Escobar actually possessed the firearm for a short period of time, duration of possession is not an element of the statute.
See
18 U.S.C. § 922(g)(1). Moreover, a defendant’s possession need not be actual; constructive possession is encompassed- by section 922(g)(1) as well.
See United States v. Wight,
Finally, with respect to Count 15, also charging him with possessing a firearm as a convicted felon, Escobar notes that (1) the firearm at issue was, under the government’s theory of the case, actually possessed by co-defendant Cruz and used
*177
to execute Matos; and (2) the jury acquitted Cruz of the killing. Escobar argues that Cruz’s acquittal on the murder charge indicates that there was insufficient evidence to show that Cruz actually possessed the firearm; and that if there was insufficient evidence to show that Cruz actually possessed the firearm, then
a fortiori
there was insufficient evidence to show that Escobar constructively possessed the firearm. The logic of Escobar’s argument falters at the threshold. Cruz’s acquittal on the murder charge does not establish that Cruz did not actually possess the firearm in question, nor does it establish that Escobar did not constructively possess the firearm. Moreover, even if the verdicts were inconsistent (which they are not), this would not justify the vacation of Escobar’s conviction under Count 15.
See United States v. Powell,
D. The March 1990 Interstate Travel Charge
Finally, Escobar challenges the sufficiency of the evidence supporting his conviction on Count 18 for aiding and abetting the interstate travel of co-defendant Jorge “Papo Luciano” Valdés-Alvarez (“Valdés”) to promote Escobar’s drug trafficking, in violation of 18 U.S.C. §§ 1952 & 2. To establish a violation of section 1952, the government must prove: (1) interstate travel or use of an interstate facility; (2) with the intent to distribute the proceeds of or otherwise promote, manage, establish, carry on, or facilitate an unlawful activity; (3) followed by performance or attempted performance of acts in furtherance of the unlawful activity.
See United States v. Arruda,
VIII. Conclusion
For the foregoing reasons, we affirm Escobar’s convictions in all respects.
Affirmed.
Notes
. The complete list of convictions includes: Count 1, engaging in a continuing criminal enterprise in violation of 21 U.S.C. 848(a) & (c); Counts 5 and 6, assaulting Customs Service officers with deadly weapons in violation of 18 U.S.C. § 111(a)(1) & (b); Count 7, possessing a machine gun in violation of 18 U.S.C. § 922(o)(l); Count 10, aiding and abetting the possession of eighty kilograms of cocaine with the intent to distribute it in violation of 21 U.S.C. § 841(a)(1); Counts 11, 17, and 18, aiding and abetting interstate travel with the intent to promote unlawful activity in violation of 18 U.S.C. § 1952; Count 12, causing an intentional killing while engaged in a continuing criminal enterprise in violation of 21 U.S.C. § 848(e); Counts 15 and 16, possessing firearms as a previously convicted felon in violation of 18 U.S.C. § 922(g)(1); Counts 19, 23, 24, and 33, using a communications device to facilitate the importation of cocaine in violation of 21 U.S.C. § 843(b); and Count 20, aiding and abetting an attempt to import 320 kilograms of cocaine in violation of 21 U.S.C. §§ 952, 960, and 963.
The jury acquitted Escobar on Counts 3, 4, and 26, charging him with drug importation, possession, and telephone facilitation offenses. Furthermore, although the jury found Escobar guilty on Count 2, conspiring to import and to possess with intent to distribute cocaine in violation of 21 U.S.C. §§ 846 and 963, the district court vacated the conviction on Double Jeopardy grounds.
See, e.g., United States v. Rivera-Martinez,
. Cedrés testified that Escobar was “the top man, the person who would plan, the person who would organize and the person who would order all aspects of the organization.”
. After losing the New York cocaine shipment in November 1989, Rivera, who had been Escobar's second-in-command, fell out of favor with Escobar. In mid-January 1990’Es-cobar asked Cedrés to become his second-in-command.
. The jury acquitted Cruz of Matos’s murder.
. 21 U.S.C. § 848(e)(1)(A) provides in pertinent part:
(e) Death penalty
(1) In addition to the other penalties set forth in this section -
(A) any person engaging in or working in furtherance of a continuing criminal enterprise, or any person engaging in an offense punishable under section 841(b)(1)(A) of this title or section 960(b)(1) of this title who intentionally kills or counsels, commands, induces, procures, or causes the intentional killing of an individual and such killing results, shall be sentenced to any term of imprisonment, which shall not be less than 20 years, and which may be up to life imprisonment, or may be sentenced to death;....
21 U.S.C. § 848(e)(1)(A).
. We arrive at the number ten after having done our best to untangle the discrepancies between the indictment and the court’s jury instructions concerning which separately charged offenses could be considered as predicate violations, and after sorting through problems in the indictment itself (none of which are raised by Escobar on appeal and are therefore deemed waived). Specifically, Count 1 of the indictment (the CCE count) alleges that the following separately charged offenses could serve as predicate offenses: Count 2 (conspiracy); Count 3 (the April 1986 importation); Count 4 (the April 1986 possession with intent to distribute); Counts 8 and 9 (charging co-defendant Faccio with drug-related offenses); Count 10 (the November 1989 possession with intent to distribute); Counts 11 and 18 (charging Escobar with aiding and abetting his co-defendants’ illegal interstate travel in violation of 18 U.S.C. § 1952); Counts 19, 23, 24, and 26 (telephone facilitation); Counts 21 and 22 (charging Escobar and co-defendants with weapons offenses); and Counts 25 and 27-31 (charging Escobar's co-defendants with drug-related offenses).
In its instructions to the jury concerning which separately charged offenses it could consider as predicate violations for the pur- • poses of the CCE count, the district court omitted several of the counts listed above (namely, counts 21 and 22, which were dismissed, and counts 25 and 27-31). It also included several counts that, although listed in Count 1 as underlying violations, could not have served as underlying violations because they did not arise under U.S.Code 21, Title 13, subchapters I or II (namely, counts 11 and 18). Additionally, the court included Count 33 (charging Escobar and a co-defendant with telephone facilitation) as a possible predicate violation for the jury to consider, even though it was not identified as such in the indictment's CCE count. Finally, the court included Counts 8 and 9 as possible predicate violations for the jury to consider, even though those counts had been dismissed upon the motion of the government.
Accordingly, by our calculations, the jury had before it ten possible predicate violations on which it might properly base a CCE conviction: Counts 2, 3, 4, 10, 19, 20, 23, 24, 26 and 33. The jury convicted Escobar on Counts 10, 19, 20, 23, 24, and 33, but acquitted him on Counts 3, 4, and 26. Furthermore, as noted previously, see supra note 1, the jury's conviction on Count 2 (the conspiracy count) was vacated by the court on Double Jeopardy grounds.
. At trial, the district court instructed the jury concerning the CCE count in pertinent part as follows:
In order to prove the allegations of [the CCE count], ... the government must prove the following five essential elements beyond a reasonable doubt: (1) That the defendant committed a felony violation of the federal narcotics laws; (2) Such violation was part of a continuing series of related violations of the federal narcotics laws; (3) The continuing series of violations was undertaken by [Escobar] in association or concert with five or more other persons; (4) [Escobar] was an organizer of these five or more other persons or occupied a management or supervisory position with respect to these five or more other persons; (5) [Escobar] obtained substantial income or resources from the continuing series of narcotics violations.... A continuing series of violations which I also mentioned means three or more violations of the federal narcotics laws, which are in some way related to one another.
. We note that
Richardson
raised but left unresolved an arguable implication of that deci- ' sion. Specifically, the
Richardson
Court left open the question whether the particular agreed-upon violations making up the continuing series must provide the basis for satisfying section 848’s remaining elements— namely, that a defendant have acted in concert with and have supervised, organized, or managed at least five persons, and that he have derived substantial income or resources. See
id.
Furthermore, as noted previously,
see supra
note 6, Count 2 (alleging that he and his
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co-defendants conspired to import and possess cocaine with the intent to distribute, and listing 102 alleged overt acts) was also identified as a predicate violation in the indictment and the jury instructions. The jury convicted Escobar on Count 2, but the district court properly vacated both the conviction and the sentence on Double Jeopardy grounds.
See Rutledge v. United States,
. 21 U.S.C. § 843(b) provides in pertinent part:
It shall be unlawful for any person knowingly or intentionally to use any communication facility in committing or in causing or facilitating the commission of any act or acts constituting a felony under any provision of this subchapter or subchapter II of this chapter [i.e., the federal drug laws].
. As the
Dotson
Court observed, the alleged error here would be characterized "as one of ambiguity and incompleteness. This is in contrast to other types of instructional error, where, for example, a trial judge fails completely to instruct on an essential element of the crime charged, or delivers an instruction that impermissibly shifts the burden of proof to the defendant on an essential element.”
Dotson,
. There is no dispute in this case that the government's challenges were directed at
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members of a cognizable racial group and that the challenges were peremptory rather than for cause, the two additional factors that must be shown in order to establish a prima facie case of race-based use of peremptory strikes.
See Bergodere,
. Escobar also contends that the court improperly refused to grant a co-defendant’s request to "define a criteria” by which to determine whether venirepersons were African-American, and that this refusal made it impossible for him to establish a prima facie case of race-based use of peremptory strikes. We do not read the record to show, that the court refused to define such a set of criteria. Rather, viewed in context, it is clear that the court simply decided that the co-defendant’s requested "criteria” were unnecessary, and that if the identification of African-Americans became problematic later in the voir dire process it would reconsider the request. The court’s ruling on this matter was well within the bounds of its discretion. Neither Escobar nor his co-defendants renewed the request to define "criteria” by which to determine whether venirepersons were African-American.
. Escobar also contends that the government presented materially misleading testimony to the grand jury about informant Cedrés, the government’s principal witness. We considered and rejected an identical argument in an appeal brought by Escobar's co-defendant Flores-Rivera.
See United States v. Flores-Rivera,
. Federal Rule of Evidence 404(b) provides in pertinent part:
Evidence of other crimes, 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....
Fed.R.Evid. 404(b).
.Escobar acknowledges in a footnote to his brief that the district court's pre-trial order included the non-Rule 404(b) rationale. However, he contends that "during the trial the Lajas incident was always referred to and treated as 404(b) evidence, indicating that both the government and the district court abandoned any other modality for admission.” We are not constrained by the district court’s apparent reliance on the 404(b) rationale during the trial.
See United States v. Arboleda,
. The government’s recitation of overt acts in the indictment was unnecessary, as the indictment charged a drug conspiracy in violation of 21 U.S.C. § 846.
See Arboleda, 929
F.2d at 865. Although overt acts were "gratuitously set forth in the indictment,”
Aponte-Suarez,
. Escobar also raises another argument re- . lated to the Lajas incident. Specifically, the government introduced evidence that in January and March 1986, pilot Robert Godbold, a convicted drug smuggler, made two trips to Puerto Rico to discuss arrangements for the Lajas drug importation with co-defendant Santos. Godbold also testified that during one of those trips, he saw Escobar in the apartment where Godbold and Santos were meeting. Escobar argues that the government did not notify him that Godbold would testify as to the latter point, see Fed.R.Evid. 404(b)("the prosecution in a criminal case shall provide reasonable notice in advance of trial, or during trial if the court excuses pretrial notice on good cause shown, of the general nature of any such evidence it intends to introduce at trial”), and that he was unfairly surprised by that testimony. Because we conclude that the Lajas incident was not 404(b) evidence, but rather was direct evidence of the conspiracy charged, we have no occasion to decide whether Godbold’s testimony went beyond matters included in the notice required by Rule 404(b).
.The government also sought to introduce Rodriguez’s testimony that Escobar delivered heroin to Rodriguez’s husband while the husband was in prison. The court refused to allow the admission of this testimony.
. The district court reasoned:
She can testify she knows him from ’88 and they had some drug dealings together, because she is in the conspiracy, she is calling him and telling him that she is willing to finance part of the operations.... [Y]ou don’t come out of the clear blue sky and say I want to finance your drug deals; they knew each other....
. In the ordinary case, the district court should, if requested to do so by defense counsel, issue a limiting instruction to the jury
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concerning the purpose of such evidence in order to further reduce the potential for prejudice flowing from its admission.
See United States v. Vest,
. Although the argument is not developed adequately in Escobar’s brief,
see United States v. Zannino,
. The order must also specify the identity of the person, if known, whose communications are to be intercepted; a particular description of the type of communication sought to be intercepted, and a statement of the particular offense to which it relates; the identity of the agency authorized to intercept the communications, and of the person authorizing the application; and the period of time during which such interception is authorized. See 18 U.S.C. § 2518(4)(a),(c)-(e).
. Escobar also makes two related arguments asserting basically that the wiretap evidence must be suppressed because he was duped into using the 256-2600 line. Citing
United States v. London,
. As noted previously, the jury convicted Es-cobar on Count 2’s conspiracy charge, which was one of the predicate offenses identified in Count l’s CCE charge.
See United States v. Rouleau,
. Escobar also suggests that the November 21, 1989 incident cannot constitute a predicate offense for the purposes of the CCE statute because he did not supervise at least five people
during that particular incident.
However, "the supervisory relationship ... need not have existed at the same time with regard to all five persons, and the five persons need not act together.”
United States v. Lueth,
.
Pinkerton
holds that a conspirator may be held vicariously liable for a substantive crime committed by a co-conspirator if that crime is in furtherance of the conspiracy and is committed while the defendant is a member of the conspiracy.
See Pinkerton v. United States,
.
Escobar also contends that the assaults on the customs officers were not planned and were not "reasonably foreseeable” as a necessary or natural consequence of the conspiracy.
See Pinkerton,
. Escobar also contends in passing that the jury's decision to acquit him of the April 14 substantive drug counts (counts 3 and 4) was inconsistent with its finding of the existence of a conspiracy. There is no inconsistency in such circumstances.
See United States v. Cruz,
. 18 U.S.C. § 922(o)(l) provides in pertinent part:
[Subject to certain exceptions not relevant here], it shall be unlawful for any person to transfer or possess a machinegun.
. 18 U.S.C. § 922(g)(1) provides in pertinent part:
It shall be unlawful for any person ... who has been convicted in any court of, a crime punishable by imprisonment for a term exceeding one year ... to ship or transport in interstate or foreign commerce, or possess in or affecting commerce, any firearm or ammunition; or to receive any firearm or ammunition which has been shipped or transported in interstate or foreign commerce.
