Full opinion text
Opinion for the Court filed Per Curiam. PER CURIAM: In these consolidated appeals, the appellants are four individuals convicted of various drug conspiracy and distribution offenses arising out of an undercover investigation of a multikilogram drug-dealing operation in Miami and the District of Columbia. Appellants challenge their convictions and sentences, raising numerous claims, one jointly and the rest individually. In Part I of this opinion, we summarize the basic facts of the ease. In Part II, we address the challenge to the jury instruction on the conspiracy charge, an argument raised jointly by all four appellants. In Part III, we address the challenges raised individually by appellant Humberto Gaviria, in Part IV, those raised by appellant Regulo Zambrano, in Part V by appellant Zachary Williams, and in Part VI, by appellant Jose Naranjo. We affirm on all issues and uphold all of the appellants’ convictions, except that we remand appellant Gaviria’s claim of ineffective assistance of counsel to the district court for an evidentiary hearing, and we vacate the forfeiture portion of appellant Williams’s sentence. I. Background The convictions at issue arose out of a joint Federal Bureau of Investigations (FBI)-Metropolitan Police Department (MPD) investigation of appellant Jose Naranjo, a federal prison inmate who, with the help of his wife Gloria Naranjo and various other individuals, continued his cocaine business while he was incarcerated at the Federal Correctional Institute (FCI) in Petersburg, Virginia. During the course of his prison term, Naranjo was introduced to David Sanders, himself an experienced drug dealer who was visiting a friend at FCI. At that initial meeting, Nar-anjo introduced Sanders to Naranjo’s wife, Gloria, who was also in the FCI visiting room at the time. Subsequently, Naranjo arranged for his wife to supply Sanders with multi-kilogram quantities of cocaine to be resold in the District of Columbia. However, this arrangement failed when Gloria Naranjo was arrested and imprisoned on a federal drug conspiracy charge during the summer of 1992. In order to maintain his cocaine business after that, Naranjo had to find a new drug connection on the outside. Consequently, during the fall of 1992, Nar-anjo put in several telephone calls from FCI to Humberto Gaviria, a convicted drug dealer residing in Colombia, to find out whether Gaviria would be willing to supply drugs for resale in the United States. In these phone calls, which like many others in the case were conducted in code, Naranjo asked Gaviria for details about the price, availability, and quality of cocaine that Gaviria would be able to acquire in Colombia. Gaviria informed Naranjo in Spanish that “one of those ears here cost[s] around $800.00 pesos,” that “there is a whole, whole, whole bunch for everyone,” and that “it is the best.” GovEx 102292 at 12-13. Per Gaviria’s request, Naranjo confirmed this conversation with a letter written in Spanish code that, among other things, provided a New Jersey telephone number for “El Perrito,” Naranjo’s “connection” for the drugs. In a November 20, 1992 telephone call, Gaviria told Naranjo that he had found a drug supplier in Colombia (“Pachito”). Subsequently, Naranjo arranged for Gaviria to come to the United States and directed Sanders to help Gaviria in the drag-selling endeavor. However, unbeknownst to Naranjo or Gaviria, Sanders was arrested on an unrelated charge sometime between the original phone calls between Naranjo and Gaviria and the time of Gaviria’s arrival in the United States. Following his arrest, Sanders agreed to cooperate with the FBI in the investigation of Nar-anjo. After Gaviria’s illegal immigration, the Naranjo/Gaviria conspiracy planned four shipments of drags that figured in the FBI/ MPD investigation. Arrangements for the first shipment, which was “lost” before arrival in this country, occurred three weeks after Gaviria’s arrival. Sanders gave Gaviria $17,-500 as a downpayment on five kilograms of cocaine, but after the money was sent, Nar-anjo and Gaviria spent months unsuccessfully tracking the shipment through South and Central America. The drags had not entered the United States by the time the two men were arrested in November 1993. The second and third shipments of drags arose out of a surprise phone call received by Gaviria on October 27, 1993, from appellant Regulo Zambrano in Miami, where Zambra-no, a Colombia native and old acquaintance of Gaviria’s, had been residing illegally since March 1993. One month prior to this phone call, Gaviria was introduced to Detective Jesus Gonzales, an undercover officer who called himself “Carlos.” Upon receiving Zambrano’s phone call, Gaviria told Sanders and Gonzales that Zambrano could provide them with drags, and Gaviria introduced them to him over the phone. Both Gaviria and Naranjo vouched for Zambrano’s trustworthiness and ability to get drags. After several more phone calls between Gaviria and Zambrano, Naranjo instructed Sanders to get Gaviria a plane ticket to Miami, and Sanders did so. Gaviria flew to Miami on November 2,1993, spending several nights at Zambrano’s house. In a three-way phone conversation in which Gonzales, Gaviria, Zambrano, Naranjo, and Sanders participated, the group talked in code about the possibility of arranging a drug deal. The next day, Friday, November 5, 1993, after receiving a message from a man calling himself “the Panamanian” via Martha Gavi-ria, Humberto Gaviria and Zambrano went to a Burger King in Coral Gables, Florida, to receive a shipment of drags from the Panamanian. Because Zambrano had to leave the Burger King meeting early, before the Panamanian’s arrival, in order to go to work, Gaviria requested that his sister Martha pick him up in her car. After she appeared at the Burger King, Gaviria requested that she wait a little while to see if the Panamanian would arrive. When the Panamaniam did arrive, he used Martha’s car to pick up an eight-kilogram package of drugs, which Gaviria then hid in Martha’s house. Two days later, on Sunday, November 7, 1993, Gonzales and Sanders flew down to Miami. In a rented hotel room that served as a meeting place, Gaviria and Martha gave them the eight kilograms of cocaine in exchange for $8,000 in transportation costs. Upon leaving the hotel where that exchange took place, Gaviria and Martha met Zambrano at a restaurant in another location and gave him a thick stack of cash. Gaviria asked Zambrano to meet with Gonzales and Sanders to “pressure them so they would pay him part of the money” for the drugs. Further negotiations followed — and Gonzales and Gaviria ultimately agreed on November 9, 1993, that Gonzales would fly to Miami and pick up the third cocaine shipment (seven kilograms) from Zambrano or Martha, and that Sanders would at the same time deliver the money still owed on the first eight kilogram shipment to Gaviria (in D.C.). In accordance with this plan, on Wednesday, November 10,1993, Zambrano first met Gonzales at a hotel. Zambrano then drove to Martha Gaviria’s house in Gonzales’s car, spent approximately ten minutes inside, drove back to the hotel to meet Gonzales, indicated to Gonzales that the drugs were hidden behind the driver’s seat, and accepted $7,000 in transportation costs from Gonzales in exchange for the seven kilograms. At that point, uniformed officers arrested Zambrano; around the same time, back in Washington, D.C., Gaviria was arrested, and the $148,000 payment he had received from Sanders, the balance of money still owed on the first shipment of cocaine, was found on his person. The fourth and final shipment of cocaine (five kilograms) occurred on November 16, 1993, after months of arrangements and planning, involving several additional participants. The events leading to the sale began in July 1993, when appellant Zachary Williams became Naranjo’s FCI cellmate. On October 15, 1993, Williams contacted Jocelyn and David Johnson from FCI and told them he had made some friends who could help obtain drugs. On October 26, 1993, Gaviria told Gonzales that Naranjo had directed Gaviria to send a friend’s [Williams’s] money — which Johnson had obtained by selling off some of Williams’s jewelry — to Colombia for another shipment of cocaine. On October 29, 1993, Naranjo gave Gaviria two telephone numbers to contact David Johnson. When Gaviria and Gonzales flew to Miami a few days afterwards, Gaviria called Johnson from the airport, and Gonzales told Johnson that he and Gaviria were preparing to purchase some cocaine. Johnson said that he wanted to set up a meeting with Gonzales and Gaviria when they returned to Washington. On November 5, 1993, Williams and Johnson had a telephone conversation in which Williams indicated that he wanted Johnson to find out whether they could get drugs on credit. On November 9, 1993, Gavi-ria suggested that six kilograms from the next shipment of drugs be sold to Johnson. On November 12, 1993 — two days after the arrests of Gaviria and Zambrano — Gonzales met with Johnson and Johnson’s friend Ulysses Bobby Wilson at a Washington restaurant. After some negotiation, Johnson and Wilson told Gonzales that they would try to get money together and call him with an “order.” Then, on November 16,1993 — after various phone calls and meetings involving Williams, David Johnson, Jocelyn Johnson, Naranjo, Gonzales, and Wilson, during which the deal was organized — Johnson and Wilson met Gonzales on a D.C. street corner and drove to an apartment. Johnson brought $13,900, $7,000 of which had been contributed by Wilson, to purchase cocaine. They agreed that Gonzales would give Johnson five kilograms of cocaine in exchange for the downpayment, and that Johnson would be allowed one week in which to sell the cocaine and pay the remainder of the purchase price. As Wilson and Johnson, who was carrying the five kilograms of cocaine in a bag, walked out of the apartment, they were arrested by police officers. The four appellants were indicted on charges of conspiracy to distribute and possess with intent to distribute five or more kilograms of cocaine, in violation of 21 U.S.C. §§ 841(a)(1) and (b)(l)(A)(ii) (Count One), and with obtaining or using approximately $44,409 in connection with that conspiracy, in violation of 21 U.S.C. § 853 (Count Three). Appellant Gaviria was also charged with illegally entering the United States following arrest and deportation, in violation of 8 U.S.C. § 1326 (Count Four). The appellants were tried before a jury. Appellants Gaviria, Naranjo, and Zambrano claimed that they had been entrapped and challenged various aspects of the government’s evidence. Appellant Williams denied any knowledge of or involvement in the conspiracy, and argued that he was “indicted and charged in this case because of a cultural misunderstanding of what [he had said] on the tapes.” On April 28, 1995, the jury returned guilty verdicts against all four appellants on all charged counts. On July 24,1995, Naranjo and Gaviria were sentenced to life in prison without parole on Count One. Gaviria also received a concurrent sentence of 180 months on Count Four. On September 13, 1995, Williams received a sentence of 188 months of incarceration. On February 5, 1996, the court sentenced Zambrano to 188 months in prison. In addition, each appellant was ordered to forfeit $44,409 pursuant to 21 U.S.C. § 853. II.Joint Issue: The Conspiracy Instruction Each appellant contends that the district court’s instruction to the jury included a sentence that might have led the jury to believe that it could convict a defendant of conspiracy without the Government having proven all the elements of the crime. Because none of the appellants objected to the instruction before the district court, our review is for plain error. Therefore, we can reverse only if (1) the jury instruction was in error, (2) the error was plain or obvious, and (3) the error affected the defendant’s substantial rights. United States v. Olano, 507 U.S. 725, 732-34, 113 S.Ct. 1770, 1776-77, 123 L.Ed.2d 508 (1993). We conclude that the disputed sentence, read in isolation, is capable of bearing two meanings — one legally erroneous and one legally correct; however, read in context, including the rest of the instructions and the lawyers’ closing statements to the jury, it is clear that the correct understanding of the instruction was conveyed to the jury. Accordingly, the instruction as a whole is not plainly erroneous. The 1,100-word conspiracy instruction included the following sentence: It is not necessary [that] the Government prove that a particular defendant was aware of the common purpose, had knowledge that the conspiracy existed, or was aware of the conspiracy from its beginning. Tr. 4981 (4/25/95). The appellants argue that the prepositional phrase “from its beginning” modifies only the last of the three verb phrases in the sentence (“was aware of the conspiracy”). So read, the sentence would imply that the Government need not prove that a particular defendant was (ever) aware of the common purpose of the conspiracy and that the Government need not prove that a particular defendant (ever) had knowledge that the conspiracy existed. The Government concedes that such would not be a correct statement of the law. See United States v. Tarantino, 846 F.2d 1384, 1393 (D.C.Cir.1988) (Government must prove that defendant shared common goal with other conspirator); United States v. Falcone, 311 U.S. 205, 210, 61 S.Ct. 204, 206, 85 L.Ed. 128 (1940) (“Those having no knowledge of the conspiracy are not conspirators.”).' The Government contends, however, that the prepositional phrase “from its beginning” modifies all three verb phrases. So read, the sentence would state that the Government need not prove that a particular defendant was aware' of the common purpose of the conspiracy from its beginning, had knowledge that the conspiracy existed from its beginning, or was aware of the conspiracy from its beginning. The appellants concede that such would be a correct statement of the law. See United States v. Miller, 895 F.2d 1431, 1440 (D.C.Cir.1990) (Government need not show defendant was part of conspiracy from its inception); United States v. Stewart, 104 F.3d 1377, 1382 (D.C.Cir.1997) (defendant can be held liable for conspiracy even if he did not join conspiracy until final crime). A reader or listener of English is not infrequently puzzled by what a linguist calls “syntactic ambiguity.” For example, the appellants point out that if one were to say, “We discussed running with Bob” the listener would not know for sure whether the prepositional phrase “with Bob” modifies the verb “discussed” or the gerund “running.” The sentence before us is similar. Drawing upon the often abstruse work of a phalanx of philologists, the appellants argue that the jury listening to (or reading, for the jurors were given a copy of the instructions to consult during their deliberations) the instruction would be more likely to resolve the syntactic ambiguity in the disputed sentence by concluding that “in the beginning” modifies only the last and not the first two verb phrases. The appellants concede, however grudgingly, that “one can find a lurking ambiguity"’ in the sentence. Joint Brief for Appellants, at 14. It is precisely because such ambiguity stalks many an utterance, judicial and otherwise, that we review a jury instruction in its entirety, not by looking only to the “supposedly erroneous snippets.” United States v. Whoie, 925 F.2d 1481, 1485 (D.C.Cir.1991). Of particular relevance to this case, we have long recognized that one ambiguous part of an instruction may be made clear by another unambiguous part of the same instruction. United States v. Lemire, 720 F.2d 1327, 1339-41 (D.C.Cir.1983). See United States v. Eltayib, 88 F.3d 157, 170-71 (2d Cir.1996) (although particular part of instruction ambiguous with regard to need to find that defendant participated in conspiracy, instruction as a whole not plainly erroneous because another part clarifies ambiguity). Just as the ambiguity in the appellant’s example (‘We discussed running with Bob”) would disappear in context (depending upon whether the preceding sentence was, say, “What did you and Bob talk about?” or “Have you chosen a running partner yet?”), the ambiguity in the disputed sentence in the instruction disappears when one considers the entire instruction. The instruction makes it clear at least twice that in order to “find a defendant guilty of conspiracy, the Government must prove each of the following things beyond a reasonable doubt ... that a particular defendant knowingly and willfully participated in the conspiracy, with the specific intent for the conspiracy to distribute or possess with intent to distribute cocaine.”' Tr. 4979 (4/25/95); see also Tr. 4982 (4/25/95). Any doubt that the jury might have been misled by the ambiguous sentence into thinking that the Government did not have to prove that a defendant was aware of the common purpose of the conspiracy, or that the Government did not have to prove that a defendant had knowledge that the conspiracy existed, is dispelled by these commands to the contrary. The appellants claim, however, that the arguably erroneous sentence uses simple terms that a juror can readily understand whereas the various formulations in the instruction that clearly set forth the Government’s burden use arcane legal terms such as “knowingly” and “willfully.” This argument is not convincing. The instruction defines the supposed arcana in simple English: “An act is done knowingly if done voluntarily and purposely, and not because of mistake, inadvertence, or accident. An act is done willfully if done knowingly, intentionally, and deliberately.” Tr. 4980 (4/25/95). The appellants also argue that to the extent that other parts of the jury instruction make it clear that the jury must find that each defendant was aware at some time of the purpose of the conspiracy and knew at some time that the conspiracy existed, those sections of the instruction merely contradict, rather than cure, the erroneous sentence. Were the disputed sentence clearly rather than only possibly wrong, we might agree, but if a sentence can mean either A or B and another sentence in the instruction clearly says A, then one does not say that the first sentence must mean B; one says, rather, that the first sentence must therefore also mean A. In addition, the court considers the lawyers’ arguments and the evidence in deciding whether a jury instruction is plainly erroneous. Whoie, 925 F.2d at 1485; United States v. Levi 45 F.3d 458, 456 (D.C.Cir.1995). In his closing argument counsel for Zambrano enumerated for the jury what the government must show in order to prove a count of conspiracy: The Government is required to prove beyond a reasonable doubt that there was a criminal conspiracy ... with a common goal to distribute cocaine in Washington, D.C. The Government must prove beyond a reasonable doubt that Mr. Zambrano knowingly and willfully became a member of this conspiracy. Tr. 4863 (4/24/95). The prosecutor also told the jury that a defendant could be convicted of conspiracy only if the jury found “beyond a reasonable doubt that the conspiracy existed and that the defendant knowingly participated in the conspiracy with the intent to encourage, advise, or assist other conspirators.” Tr. 4768 (4/24/95). Having been told by the judge, by defense counsel, and by the prosecutor that it could not find a defendant guilty of conspiracy unless the Government proved that the defendant knew that the conspiracy existed and knew what its purpose was, the jury could not have misunderstood the disputed sentence to have said the opposite. III. Appellant Gaviria Several defendants, including appellant Gaviria, spoke little English. Concerned that they would not understand the plea negotiation process, the district court requested at . a November 1994 status conference that each outstanding plea offer be put on the record. With his lawyer and the prosecutor present, each defendant approached the bench separately. Gaviria went first. The prosecutor put on the record that under the plea offer tendered to Gaviria, the Government would not file repeat-offender or life enhancement papers if Gaviria pled guilty to a count of conspiracy to distribute cocaine, a criminal forfeiture count, and a charge of unlawful re-entry into the United States following deportation. The prosecutor added, “That plea, like all of the pleas still existing in the case, is wired to the acceptance of pleas by the codefendants,” meaning that the Government would not accept a plea from Gaviria unless all defendants pled. Tr. 26 (11/17/94). In response to a question from the district court as to what sentence Gaviria would face if he were to accept the plea, Gaviria’s attorney answered: Mr. Gaviria, with two prior felony drug convictions, would be considered under [section 4B1.1 of] the [Federal Sentencing] guidelines to be a career offender, which would automatically take him to a category VI under the criminal history category and, I believe in his case, at least an offense level 37, which separate from the amount of drugs involved, as I recall, would require a sentence that starts, I believe, at about 36 years and goes up. Tr. 27 (11/17/94). When the district court responded, “360 months to life.... That’s with the plea,” defense counsel agreed: “That is with the plea. Without the plea, he faces a mandatory sentence of life.” Id. at 27-28. Defense counsel was wrong. More than a year before the November 1994 status call, we held in United States v. Price, 990 F.2d 1367, 1370 (D.C.Cir.1993), that a defendant convicted of conspiracy could not be sentenced as a career offender because the statute under which the Guideline career offender provision was initially promulgated did not list conspiracy as a crime warranting career offender treatment. If Gaviria had accepted the Government’s plea offer, his Guideline range would therefore have been 188-262 months (fifteen to twenty-two years), assuming all other contributing factors remained the same and that he received a two- or three-point downward adjustment for acceptance of responsibility. Having been advised by his lawyer that he faced thirty years to life in prison under the plea agreement, Gavi-ria instead rejected the offer. Following Gaviria’s conviction and as required by the “three-strikes” rule of 21 U.S.C. § 841(b) (1994), the district court imposed a mandatory sentence of life imprisonment. Gaviria now argues that had counsel advised him correctly at the November 1994 status call, instead of risking life imprisonment upon conviction, he would have accepted the Government’s offer and received a fifteen-to-twenty-two-year sentence. With the misinformation his lawyer gave him, Gav-iria contends, he had little to lose by going to trial. For an ineffective-assistance claim to succeed under the familiar Strickland standard, a defendant must show two things: that his lawyer made errors “so serious that counsel was not functioning as the ‘counsel’ guaranteed the defendant by the Sixth Amendment,” Strickland v. Washington, 466 U.S. 668, 687, 104 S.Ct. 2052, 2064, 80 L.Ed.2d 674 (1984); and that counsel’s deficient performance was prejudicial, i.e., that there is a “reasonable probability that, but for counsel’s unprofessional errors, the result of the proceeding would have been different.” Id. at 694, 104 S.Ct. at 2068. Because ineffective assistance of counsel claims usually require an evidentiary hearing, we normally do not resolve them on direct appeal, instead remanding to the district court. See United States v. Fennell, 53 F.3d 1296, 1303-04 (D.C.Cir.1995); see also United States v. Morrison, 98 F.3d 619, 626 n. 7 (D.C.Cir.1996), cert. denied, - U.S.-, 117 S.Ct. 1279-80, 137 L.Ed.2d 355 (1997). This rule has two exceptions: “when the trial record alone conclusively shows that the defendant is entitled to no relief,” and when the record “conclusively shows the contrary.” Fennell, 53 F.3d at 1303-04. Because this case falls within neither exception, we will remand Gaviria’s ineffective-assistance claim for an evidentiary hearing. Gaviria satisfies Strickland’s first prong. His counsel’s representation that Gaviria would be sentenced as a career offender following a plea and that his Guideline range would be from 360 months to life was plainly incorrect. Because we issued Price a year and a half prior to the November 1994 status conference, Gaviria’s counsel should have been aware of the decision and its implications for his client. Cf. United States v. Day, 969 F.2d 39, 43 (3d Cir.1992) (“[Fjamiliarity with the structure and basic content of the Guidelines (including the definition and implications of career offender status) has become a necessity for counsel who seek to give effective representation.”). Not so clear is whether Gaviria satisfies Strickland’s prejudice requirement; that is, whether there was a “reasonable probability” that he would have entered a guilty plea had his lawyer correctly advised him of his sentence exposure. As the Government reiterated many times at the status conference, Gaviria’s plea offer was “wired” to the offers to his codefendants. For Gaviria to succeed on his ineffective-assistance claim, therefore, he must establish not only that he would have taken the plea offer if his lawyer had advised him correctly, but also either that each of his co-defendants would have accepted their respective plea offers, or that the Government would have offered Gaviria an unwired plea. We think it quite likely that Gaviria would have accepted the plea offer. After all, fifteen to twenty-two years for a man in his mid-forties is significantly less than life imprisonment, and Gaviria himself admits that the prosecution’s case against him was quite strong. Reply Brief for Appellant Gaviria, at 2. Gaviria does not claim that each of his codefendants would have accepted their offers, arguing instead that his wired plea offer was just Government “posturing,” and that the Government was clearly willing to accept individual pleas. In support of this contention, he points out that in January 1995, one day before trial began, the Government accepted Ulysses Wilson’s plea even though at the status conference the Government insisted, as it did with each of the other defendants, that Wilson’s plea offer was wired. Tr. 89 (11/17/94) (“[T]his plea is wired; that is, it would require the guilty pleas of [Wilson’s] codefendants before the government would accept Mr. Wilson’s plea.”). Gaviria also points to the prosecution’s statement that it would consider counteroffers from individual defendants. See, e.g., id. at 30 (‘We’ve always, I should say, entertained counteroffers, and [counsel for Zambrano] has made a counteroffer which we’ve rejected.”). Gaviria’s arguments have merit. Although we do not suggest that the prosecution would have followed the exact same course in dealing with Gaviria that it did with Ulysses Wilson, the fact remains that the Government accepted an unwired plea from Wilson despite its contention that Wilson’s offer, like other offers, was wired. Coupled with the Government’s consideration of counteroffers as of the status conference, this supports Gaviria’s contention that the Government would have been willing to accept an unwired plea from him had he, aware of his true exposure under the plea, begun negotiating. Not denying that it accepted counteroffers from individual defendants, the Government argues that the Wilson plea, like pleas from other co-defendants taken prior to November 1994, was “not without a price” — the Government required Wilson to meet with FBI agents and police detectives to answer questions about his transactions with “Kiki.” Brief for Appellee, at 46. If anything, however, this argument supports Gaviria because it shows that the prosecution’s initial plea offer to Wilson, containing no mention of cooperation with the FBI or local police, was not set in stone but was later modified, presumably to counterbalance the unwired nature of Wilson’s plea and to sweeten the prosecution’s end of the bargain. Claiming that the length of Gaviria’s sentence would not change even if he prevails in the district court and claims the benefit of the initial plea, offer, the Government argues that Gaviria cannot satisfy Strickland’s prejudice requirement. As the Government points out, because the Sentencing Guidelines were amended in 1994 in response to Price, a defendant with two or more prior felonies now convicted on a drug conspiracy charge is treated as a career offender. According to the Government, the current Guidelines would apply to Gaviria and his Guideline range would be thirty years to life. We disagree. The premise underlying the Government’s argument is incorrect: if Gaviria prevails on his ineffective-assistance claim, he cannot be resentenced under the current Guidelines because to do so would violate the Constitution’s Ex Post Facto Clause. U.S. Const, art. I, § 10. Long ago, the Supreme Court explained: It is settled, by decisions of this Court so well known that their citation may be dispensed with, that any statute which punishes as a crime an act previously committed, which was innocent when done; which makes more burdensome the punishment for a crime, after its commission, or which deprives one charged with crime of any defense available according to law at the time when the act was committed, is prohibited as ex post facto. Beazell v. Ohio, 269 U.S. 167, 169-70, 46 S.Ct. 68, 68-69, 70 L.Ed. 216 (1925). Accordingly, the Sentencing Guidelines state: “If the court determines that use of the Guidelines Manual in effect on the date that the defendant is sentenced would violate the ex post facto clause of the ... Constitution, the court shall use the Guidelines Manual in effect on the date that the offense of conviction was committed.” U.S.S.G. § 1B1.11(b)(l) (1995). Because applying the Current Guidelines to Gaviria would, in Beazell’s words, “make[] more burdensome the punishment for a crime, after its commission,” should Gaviria prevail on his ineffectiveness claim, he will be resenteneed under the Guidelines as they existed prior to the 1995 amendment. See United, States v. Booze, 108 F.3d 378, 381 n. 3 (D.C.Cir.1997) (resentencing occurs under version of Guidelines in effect at time of resentencing unless to do so would violate Ex Post Facto Clause); United States v. Clark, 8 F.3d 839, 844 (D.C.Cir.1993) (same). The Government contends that because Gaviria joined the conspiracy prior to Price, he should have recognized his potential exposure to the Guidelines’ career-offender provision. But Price held that a defendant convicted of conspiracy and sentenced under the Guidelines’ career-offender provision had been illegally sentenced. Price, 990 F.2d at 1370. Because the career-offender provision was initially promulgated under a statute making no reference to drug conspiracy as a predicate crime for career-offender status, the provision was not lawfully applicable to drug conspiracy defendants — before or after Price — until the Sentencing Commission remedied its error in 1995. See U.S.S.G. § 4B1.1 (1995); id. App. C, amend. 528 (1995). Cf. Rivers v. Roadway Express, Inc., 511 U.S. 298, 312-13, 114 S.Ct. 1510, 1519-20, 128 L.Ed.2d 274 (1994) (“A judicial construction of a statute is an authoritative statement of what the statute meant before as well as after the decision of the case giving rise to that construction.”); United States v. McKie, 73 F.3d 1149, 1153 (D.C.Cir.1996) (same). We also disagree with the Government that sentencing Gaviria under the old version of the Guidelines would give him an unearned “windfall.” Brief for Appellee, at 48. Gavi-ria was not, as the Government would have it, merely “ ‘deprived ... of the chance to have the ... court make an error in his favor.’ ” Lockhart v. Fretwell, 506 U.S. 364, 371, 113 S.Ct. 838, 122 L.Ed.2d 180 (1993) (quoting brief for United States as Amicus Curiae at 10). If Gaviria had been sentenced following a timely plea, he would not have been taking advantage of a court’s erroneous construction of the law. See Fretwell, 506 U.S. at 371, 113 S.Ct. at 843. Instead, he would have been sentenced according to the then-existing Guidelines. Gaviria gets no windfall; he gets instead the sentence for which he would have been eligible had he timely pled. We thus remand Gaviria’s ineffective-assistance claim to the district court for an evi-dentiary hearing on two issues: whether Gaviria would have taken the Government’s plea offer had he known of his true exposure under the Guidelines; and whether the Government would have entertained an unwired plea from Gaviria. While recognizing the inherent difficulty in reconstructing events long past and in determining what might have been had counsel given his client correct information on his sentencing exposure, we emphasize that Strickland requires reasonable probability, not certainty. Strickland, 466 U.S. at 694, 104 S.Ct. at 2068 (“A reasonable probability is a probability sufficient to undermine confidence in the outcome.”). Because we remand Gaviria’s ineffective assistance claim on these grounds, we have no need to address his separate contention that the district court had an obligation to correct counsel’s error sua sponte. IV. Appellant Zambrano All five of Regulo Zambrano’s challenges— one to his conviction and five to his sentence — rely on the fundamental premise that he did not become involved in the charged conspiracy until November 10, and that his involvement was limited to his purportedly coerced personal delivery on that date of seven kilograms of cocaine to Gonzales in exchange for a $7,000 deposit from Gonzales. Because the record evidence amply supports the conclusion — by the jury at the conviction stage, and by the district court judge at the sentencing phase — that Zambrano’s involvement predated the November 10 delivery, and the district court’s conclusion at the sentencing phase that Zambrano was dishonest in his trial testimony about the extent of his involvement in the conspiracy, all of his challenges must fail. A. Sufficiency of Evidence to Support Conspiracy Conviction Appellant Zambrano cites three reasons why there was insufficient evidence to convict him of conspiring to possess cocaine with intent to distribute pursuant to 21 U.S.C. § 846 and § 841(a)(1). First, he argues that there was insufficient evidence that he knowingly participated in the charged conspiracy at all. Second, he contends that even if he was involved in a conspiracy, it was separate from and smaller than the charged conspiracy, and was limited to a one-time distribution on November 10 in Florida. Finally, Zambrano claims that because the conspiracy in which he was allegedly involved was limited to transactions in Florida, the district court did not have subject matter jurisdiction over his trial. We conclude that none of Zambrano’s three challenges to his conviction has merit. 1. Insufficient Evidence that Zambrano Participated in Any Conspiracy Zambrano’s first challenge must fail because there is ample evidence on the record to support his conviction for conspiring to distribute cocaine. Zambrano’s conspiracy conviction should be reversed for insufficient evidence only if, “viewing [the evidence] in the light most favorable to the government, a reasonable trier of fact could not have found guilt beyond a reasonable doubt.” United States v. Lam Kwong-Wah, 924 F.2d 298, 302 (D.C.Cir.1991). At trial, the government was required to prove beyond a reasonable doubt that Zambrano purposefully “entered into an agreement with at least one other person and that the agreement had as its objective a violation of the law.” Id. at 303 (internal quotation marks omitted). In proving that an agreement to violate the law existed, “the government need only show that the conspirators agreed on the essential nature of the plan, not that they agreed on the details of their criminal scheme.” United States v. Gatling, 96 F.3d 1511, 1518 (D.C.Cir.1996). Under this standard, Zambrano’s conviction must be upheld if the government produced sufficient evidence for the jury to find beyond a reasonable doubt that Zambrano intended to and did in fact conspire with Gaviiia to distribute at least one shipment of cocaine in Miami. The government clearly met its burden here. Although Zambrano claims that the evidence is insufficient because he “did not participate in any discussions between Humberto Gaviria and Detective Gonzales about quantity or price” and “[h]e was not present when the day, time or location of the transaction was fixed,” Brief for Appellant Zambrano, at 17, these details are insignificant in light of the overwhelming direct and circumstantial evidence against Zambrano, including numerous telephone conversations, meetings, and actions. Construed in the light most favorable to the government, this evidence demonstrates that the conspiracy in which Zambrano participated encompassed both the November 7 and the November 10 transactions. In addition to delivering personally the seven kilograms of cocaine on November 10, a fact which Zambrano concedes, the record shows the following facts: a week after first speaking to Zambrano, Gaviria, a key player in the conspiracy, traveled from Colombia to Miami, moved into Zambrano’s house, and received 15 kilograms of cocaine on credit three days later from a complete stranger; then, after delivering the first shipment of eight kilograms of cocaine to undercover agents in exchange for $8,000, Gaviria was observed giving Zambrano a thick stack of cash. After the November 7 transaction had taken place, Zambrano pressured government agents for the remainder of the price of the first shipment of cocaine, stating that future deliveries were contingent upon full payment. Finally, after hearing that the balance of the payment had been received by Gaviria in Washington, Zambrano personally delivered the second shipment of cocaine to Gonzales on November 10. All of this evidence in combination is more than adequate to support the jury’s decision to convict Zambrano for conspiring to distribute or possess with intent to distribute cocaine. 2. Variance Between Evidence and Indictment Zambrano’s second argument alleging “multiple conspiracies” and a variance between the evidence and the indictment is similarly unpersuasive and certainly does not constitute plain error. In order to show that the indictment varied improperly from the evidence, appellants must demonstrate (1) that the evidence at trial established the existence of multiple conspiracies, rather than the one conspiracy alleged in the indictment, and (2) that because of the multiplicity of defendants and conspiracies, the jury was substantially likely to transfer evidence from one conspiracy to a defendant involved in another. United States v. Tarantino, 846 F.2d 1384, 1391 (D.C.Cir.1988) (as amended). Zambra-no’s argument fails because the evidence demonstrates that he did participate in the charged conspiracy. Zambrano concedes his involvement in the seven kilogram transaction that occurred on November 10, but as explained above he asserts that this was the only transaction in which he was involved or, at the very least, that he was not involved in any of the parts of the charged conspiracy that transpired in Washington, D.C. In contrast to his assertions, the government asserted, both at trial and on appeal, that all the codefendants participated in a single conspiracy with the goal of distributing large quantities of cocaine. According to the government’s theory, Naranjo and Gaviria initiated the importation of drugs from Colombia and sought customers who would buy the drugs in order to resell them. Zambrano’s role was to supply the conspiracy with large quantities of cocaine. Williams, Johnson, and Sanders — until he was arrested and became an informant — were potential buyers of the cocaine. See Brief for Appellee, at 66. To prove the existence of a single conspiracy in which Zambrano participated, the Government was not required to prove that Zam-brano knew all the other participants in that conspiracy. We have previously stated “that participants in a continuous drug distribution enterprise can be parties to a single conspiracy even if they do not all know one another, so long as each knows that his own role in the distribution of drugs and the benefits he derives from his participation depend on the activities of the others.” Childress, 58 F.3d at 709-10. To determine whether defendants who did not all know one another were nevertheless co-conspirators, this court examines “whether the defendants ‘shared a common goal,’ any ‘interdependence between the alleged participants,’ and ‘any overlap among alleged participants,’ such as the presence of core participants linked to all the defendants.” Gatling, 96 F.3d at 1520 (quoting United States v. Graham, 83 F.3d 1466, 1471 (D.C.Cir.1996)). The Government amply met its burden in this case. As already explained, the record contains overwhelming evidence indicating that Zambrano was an integral participant in both the November 7 and 10 drug transactions. Moreover, although Zambrano may not have known the specific identity of the buyers for the drugs he was supplying, he must have known that those buyers existed, and that he was connected to those buyers by Gaviria and Naranjo, the core participants in the conspiracy. Indeed, as the Government persuasively argues, the sheer quantities of drugs involved and the speed with which the first eight kilograms of cocaine were converted into cash indicated that the drugs were being sold to others for retail distribution. 3. Lack of Jurisdiction/Venue Finally, Zambrano’s third argument alleging “lack of jurisdiction” in the district court is also meritless. The Government was correct to point out that the district court’s jurisdiction in this case, premised on 18 U.S.C. § 3231, was not conditioned on the location of the criminal conduct charged. Thus, Zambrano’s “jurisdictional” claim is more properly identified as a challenge to venue. However, Zambra-no waived this challenge when he failed to raise it below. See United States v. Wilson, 26 F.3d 142, 151-52 (D.C.Cir.1994). In any event, the court did not commit plain error by allowing the case to be tried in D.C. Because overt acts in furtherance of the conspiracy did occur within the District of Columbia, venue was proper notwithstanding Zambrano’s claim to the contrary. Lam Kwong-Wah, 924 F.2d at 301 (“It is a well-established rule that ‘a conspiracy prosecution may be brought in any district in which -some overt act in furtherance of the conspiracy was committed by any of the co-conspirators.’ ”) (quoting United States v. Rosenberg, 888 F.2d 1406, 1415 (D.C.Cir.1989)). B. Sentencing Issues At Zambrano’s sentencing, the district court found that he was responsible for all 15 kilograms of cocaine that were sold in Miami on November 7 (eight kilograms) and November 10 (seven kilograms). Accordingly, his base offense level was 34. The court then added two levels for obstruction of justice because Zambrano perjured himself. The court also found that Zambrano was not entitled to a downward adjustment based on the minimal or minor nature of his role in the offense, or on acceptance of responsibility. Finally, the court concluded that he was not eligible for the safety valve provision of the Sentencing Guidelines. Zambrano’s total offense level was 36, which meant that the applicable sentencing range given his criminal history category of I was 188 to 235 months. The court ultimately gave Zambra-no a sentence at the bottom of the range— 188 months. We review the district court’s findings of fact during the sentencing phase for clear error. United States v. Broumas, 69 F.3d 1178, 1180 (D.C.Cir.1995) (citing United States v. Kim, 23 F.3d 513 (D.C.Cir.1994)). The district court’s application of the Sentencing Guidelines to the facts is entitled to “due deference.” See id. Legal questions relating to sentencing are reviewed de novo. See id. 1. Obstruction of Justice Under the Sentencing Guidelines, a defendant commits perjury and obstructs justice under U.S.S.G. § 3C1.1 if he “gives false testimony concerning a material matter with the willful intent to provide false testimony, rather than as a result of mistake or faulty memory.” United States v. Dunnigan, 507 U.S. 87, 94, 113 S.Ct. 1111, 1116, 122 L.Ed.2d 445 (1993). A defendant also obstructs justice if he “provides] materially false information to a probation officer in respect to a presentence or other investigation for the court.” U.S.S.G. § 3C1.1, cmt. n.3(h). The district court must find willful perjury by clear and convincing evidence. United States v. Montague, 40 F.3d 1251, 1254 (D.C.Cir.1994) (as amended). In the present case, the district court did find by clear and convincing evidence that Zambrano willfully provided false testimony when he testified that (1) he did not know about or engage in the cocaine conspiracy until November 10,1993; and (2) he was coerced into participating in the conspiracy on November 10 by pressure from Gonzales and his concern for the safety of Martha Gavina. The court additionally found that Zambrano had furnished the same materially false information to the U.S. Probation Office. Zambrano claims that the district court erred in three respects when it found that Zambrano obstructed justice. First, he claims that none of the testimony that the district court cited as perjurious was false. Second, he contends that, even if some of the testimony was false, none of it was material. Third, he asserts that there was no showing that any of the purported falsehoods were willful. None of these three arguments is persuasive. First, the district court did not commit clear error in finding that Zambrano testified falsely. Although Zambrano makes much of the fact that his testimony at trial (regarding the November 7 meeting with Gonzales and Sanders) was internally consistent, see Brief for Appellant Zambrano, at 1-4, he fails to account for the fact that the district court found credible testimony offered by Gonzales and Martha Gaviria — which directly contradicted Zambrano’s testimony. Moreover, the district court did not commit clear error when it found that Zambrano had lied by testifying that he did not “discuss any business” with Gonzales during their November 8, 1993, telephone call. The conversation was conducted in code, and Zambrano contends that there is therefore no basis for finding that Zambrano understood that Gonzales was talking about drugs. However, Zambrano never stated during the conversation that he did not understand what the conversation was about, and two days later, Zambrano referred back to the conversation, stating that he “understood that [Gonzales] ... had told [Zambrano] that it had been brought down, that it wasn’t putting out what it was supposed to be_” GovEx 111093-2, at 8. The district court also did not commit clear error when it found by clear and convincing evidence that Zambrano lied to the jury and the Probation Office by claiming that he was coerced into participating in the conspiracy by threats against the safety of Martha Gaviria. Any of these three findings of false testimony would serve to support the district court s finding that Zambra-no obstructed justice. Second, the district court did not err in finding that Zambrano’s false testimony was material. Under the Sentencing Guidelines, information is material when, “if believed, [it] would tend to influence or affect the issue under determination.” U.S.S.G. § 3C1.1, emt. n.5. The false testimony Zambrano gave was clearly material because it was crucial to the Government’s ability to defeat Zambrano’s entrapment defense, which asserted that Gonzales entrapped Zambrano on November 10 by pressuring him into delivering the seven kilogram shipment of cocaine. If the jury found that, contrary to his false testimony, Zambrano participated in the conspiracy prior to November 10, his entrapment claim would fail. Third, the district court did not err in concluding that Zambrano’s false statements were willful. Indeed, Zambrano does not claim that the statements resulted from “mistake or faulty memory.” Dunnigan, 507 U.S. at 94, 113 S.Ct. at 1116. He only claims that they were not false. Because the record overwhelmingly supports the court’s finding that the statements were in fact false, and because there is no evidence in the record that Zambrano was confused, mistaken or forgetful about the scope of his participation in the conspiracy, the finding of willfulness should be affirmed. 2. Minor or Minimal Participant Reduction Zambrano claims that he should have received a reduction in his base offense level because he was either a “minor” or “minimal” participant in the charged conspiracy under U.S.S.G. § 3B1.2. He argues that, in addition to the fact that he had no prior criminal record, he was not involved in “initiating the conspiracy, attempting to locate suppliers, arranging finances for Humberto Gaviria’s return to the United States, negotiation of the quantity or price of the cocaine sold to the undercover officer, or transferring the initial 8 kilograms.” Brief for Appellant Zambrano, at 7. Moreover, Zambrano claims that the district court failed to consider his blameworthiness relative to his co-conspirators as required by the Guidelines, and that he was far less culpable than Gavi-ria, Naranjo, or Williams. We are not persuaded by Zambrano’s argument that the district court erred in ruling that Zambrano’s role in the conspiracy was not “minor.” The district court found: [Zambrano’s] role here is very clear from the evidence and his conversations with the undercover agent and his spending the afternoon and evening with him essentially for the final delivery and discussions he had with the agent at that time, accepting the $7000, being entrusted to accept that money by whoever owned the drugs, and his first meeting with him, his request to get the money down, his instructions that he wouldn’t release the rest of the drugs until the first payment had been received by Mr. Gaviria in Washington, all take him out of the role of a minor or minimal player. He’s not just a courier. Hrg. Tr. 19-20 (2/5/96). These findings were supported by the record, and the district court was justified in concluding that this level of active participation in the conspiracy made Zambrano ineligible for the downward departure under section 3B1.2. Under this circuit’s precedent, even a so-called “courier” may not qualify for a downward departure as a “minor” participant because, depending on the specific circumstances involved, “a courier can play as active and culpable a part in a drug offense as another participant.” United States v. Caballero, 936 F.2d 1292, 1299 (D.C.Cir.1991). Zambrano’s argument that the district court failed to consider his culpability in relation to his co-conspirators is similarly meritless. Although in cases of joint criminal activity, a district court should examine a defendant’s culpability in relation to his co-conspirators’ culpability, “a defendant is not entitled to a reduction ... simply because he is the least culpable among several participants in a jointly undertaken criminal enterprise.” United States v. Lockhart, 37 F.3d 1451, 1455 (10th Cir.1994). Rather, a court may find that none of the co-conspirators qualify as “minor” participants because even the “least culpable” participants in the conspiracy — although they might not have played the roles of organizers or supervisors within the chain of command — nevertheless were active participants and were equally culpable vis-a-vis each other. In so concluding, “the district court need not make express findings of relative culpability so long as it is clear that the court assessed the defendant’s ‘role in-the specific criminal conduct’ and did not ‘gauge his culpability ge-nerieally.’ ” Washington, 106 F.3d at 1018 (quoting United States v. Edwards, 98 F.3d 1364, 1370 (D.C.Cir.1996)). Here, it is clear that the district court examined Zambrano’s role in relation to the conspiracy in which he participated, and that the record as a whole supports the court’s conclusion that Zambra-no played far more than a “minor” role in the conspiracy. As we have previously explained, “the district court is in the best position to assess the defendant’s relative culpability vis-a-vis other participants in the offense.” United States v. Williams, 891 F.2d 921, 926 (D.C.Cir.1989); see also United States v. Caballero, 936 F.2d 1292, 1299 (D.C.Cir.1991) (“The application of section 3B1.2 is inherently factbound and largely committed to the discretion of the trial judge.”). We conclude that the district court correctly applied the Sentencing Guidelines as they pertain to the downward adjustment for a minor or minimal role; therefore, we affirm the court’s denial of this adjustment to Zambrano. 3. Downward Departure for Acceptance of Responsibility Appellant Zambrano next asserts that the district court erred when it refused to grant him a downward departure for accepting responsibility for transferring the November 10 shipment to Gonzales in exchange for $7,000, despite the fact that he denied any involvement in the conspiracy prior to November 10 and claimed that his delivery of the seven kilograms was coerced. During the sentencing phase, the court found that — both at trial and in his presentence memorandum to the Probation Office — Zambrano “admitted only to a limited role, which he said he was forced into, in his delivery on November 10, and that certainly is not acceptance for [sic] responsibility under [U.S.S.G. § ] 3E1.1, and normally, certainly when he obstructs justice, it would be difficult to find that in any event.” Sentencing Transcript 36. Zambrano claims that, because he accepted full responsibility for his involvement in the conspiracy and the trial court erroneously found that he perjured himself, the corat also erred when it denied him the departure. We reject this argument because we have already rejected Zambrano’s claim that the district court erred in finding that he committed perjury. To receive the downward adjustment raider § 3E1.1, a defendant must “truthfully admit[ ] or not falsely deny[ ] any additional relevant conduct for which [he] is accountable under § 1B1.3 (Relevant Conduct).” U.S.S.G. § 3E1.1, cmt. n.l(a). In almost all cases, a defendant who denies guilt and goes to trial, or who receives an obstruction of justice enhancement under § 3C1.1, is not eligible for a downward adjustment for acceptance of responsibility. Id., cmt. nn.2, 4. Zambrano clearly failed to accept responsibility for his full participation in the charged conspiracy, and so he is not entitled to the departure. 4. Downward Departure Under the Safety Valve Provision Since we conclude that the district court did not err in finding that Zambrano perjured himself, we also affirm the court’s determination that Zambrano was not entitled to a downward departure under the safety valve provision of 18 U.S.C. § 3553(f) and U.S.S.G. § 5C1.2. Five criteria must be satisfied for the district court to grant an adjustment under this provision. The fifth criterion is that: (5) not later than at the time of the sentencing hearing, the defendant has truthfully provided to the Government all information and evidence the defendant has concerning the offense or offenses that were part of the same course of conduct or of a common scheme or plan, but the fact that the defendant has no relevant or useful information to provide or that the Government is already aware of the information shall not preclude a determination by the court that the defendant has complied with this requirement. 18 U.S.C. § 3553(f)(5) (1994). The fifth element of the safety valve provision requires full and candid disclosure by the defendant of all information in his possession concerning the charged offense, see, e.g., United States v. DeJesus-Gaul, 73 F.3d 395, 397 (D.C.Cir.1996), and Zambrano clearly failed to meet this requirement when he perjured himself during the trial and presentencing proceedings. Accordingly, the district court was justified in denying Zambrano a downward departure under the safety valve provision. 5. Accountability for Entire 15 Kilograms of Cocaine During sentencing, the district court found that Zambrano had lied about his involvement in the drug” transaction that took place on November 7 and that he therefore was responsible for all 15 kilograms involved in both the November 7 and November 10 transactions. In his brief, Zambrano contests the district court’s conclusion, stating: Because the record does not support a finding that appellant lied about his involvement as to the November 7th transaction, the record cannot and does not support a finding that the sale of the total 15 kilograms was reasonably foreseeable to or in furtherance of appellant’s agreement with the co-conspirators. Rather, although appellant knowingly participated in the November 10th transaction of 7 kilograms, a preponderance of the evidence in the record does not indicate his foreseeability with respect to the November 7th transaction. The fact that appellant was convicted of conspiracy does not end the analysis. Brief for Appellant Zambrano, at 14-15. Similar to Zambrano’s other sentencing challenges, this one relies on his assertion that his involvement in the conspiracy was much more limited than the district court found that it was. Zambrano’s argument fails because, as explained above, the district court did not err in concluding that he in fact participated in the November 7 drug transaction. The record indicates that, after Gavi-ria transacted the November 7 sale, he gave Zambrano a large stack of cash and requested that Zambrano pressure the undercover “buyers” to pay the remaining balance for the cocaine. Following this directive, Zam-brano met with the undercover agents, told them that he did not like to be kept waiting, and informed them that more drugs would not be forthcoming until they paid the balance on the first shipment. He also refused to make the November 10 delivery of seven additional kilograms until assured that the balance of $148,000 on the previous shipment was paid. Even if — giving Zambrano the benefit of every doubt — he was not in fact responsible for initially “supplying” the drugs, the record evidence amply supported the district court’s conclusion that he participated in the November 7 sale; at the very least, he aided and abetted the transaction, and such action is clearly covered by the “relevant conduct” definition of U.S.S.G. § lB1.3(a)(l)(A). V. Appellant Williams A. Failure to Allow Recall of Government Witness One of the primary prosecution witnesses against Williams, David Johnson, a former eo-defendant, pled guilty in September 1994 to possession with intent to distribute cocaine. A long-time Williams friend and a fellow drug dealer, Johnson testified that Williams and his cellmate Naranjo arranged two drug deals for him: to purchase heroin from “KiM,” and to buy cocaine from undercover Detective Gonzales, who in turn had purchased it from Gaviria. Johnson’s testimony against Williams included “decoding” several phone calls placed by Williams to him from the jail, since Williams, like the other defendants, spoke of drug dealing in code. Because it placed Williams in the role of intermediary and facilitator of several drug transactions, Johnson’s testimony was quite damaging to Williams. Williams’s attorney accordingly cross-examined Johnson thoroughly, establishing, among ot