Likе many others before them, Patrick Menting and Dennis Tushoski were charged with, and convicted of, conspiring to distribute cocaine in violation of 21 U.S.C. § 846. Both men now claim that their convictions are infirm because the district court did not instruct the jury properly. In addition, Menting asserts that his conviction was unsupported by the evidence, and Tushoski believes that the district court should not have enhanced his sentence for obstruction of justice. Finding no errors with the district court’s judgment, we affirm.
I
Menting and Tushoski conducted their cocaine business in the Eagle River, Wisconsin area between 1988 and 1996. Their supplier was one Stephen Pszeniczka, who for eight years made nearly weekly trips from Eagle River to Milwaukee to purchase cocaine. Pszeniczka typically returned with аpproximately one ounce of uncut cocaine.
Although the individual quantities were small, Pszeniczka was as regular as clockwork. Over time, his operation cumulatively involved a significant amount of cocaine and a dozen or so participants, including Menting and Tushoski. At trial, Pszeniczka reported that after each drugbuying trip to Milwaukee, he distributed approximately three-fourths of his one ounce to three pre-desig-nated customers. One of these customers was Tushoski, the owner of a local auto body shop.
*926 Pszeniczka explained that between 1991 and 1996 he sold Tushoski uncut cocaine in amounts ranging from one-sixteenth of an ounce to one-half of an ounce per sale. Often, these transactions occurred at Tushо-ski’s auto body shop. This was convenient for Tushoski in two important ways: first, it facilitated his purchases from Pszeniczka, because the latter would stop at the auto body shop on his way back from Milwaukee, use the shop’s paint scale to weigh out the orders, and complete the sales; and second, the two had ready customers in Tushoski’s employees, who placed thеir orders for Pszen-iczka with Tushoski. Sometimes Pszeniczka would simply pre-package the cocaine according to Tushoski’s specifications and deliver the cocaine to the shop.
After Pszeniczka made the sales of unadulterated cocaine to his three pre-determined customers, he mixed the remaining cocaine with inositol and sold it, often pre-packaged for individual sale. Between 1991 and 1994, one of his regular customers was Menting, who bought in amounts varying from a quarter of a gram to one-eighth of an ounce. Unlike Tushoski, Menting did not have a standing order with Pszeniczka. Instead, from time to time Menting would call Pszen-iczka from a bar Menting frequented and place orders for himself and other patrons. Pszeniczka would then deliver the requestеd amounts to Menting at the bar, or Menting would go to Pszeniczka’s home, where Pszen-iczka would weigh and individually wrap the cocaine to Menting’s specifications. Usually Menting paid at the time of purchase, but sometimes Pszeniczka fronted Menting drugs for payment at a later date. Menting rarely bought during the week, but he often placed between six and eight orders in the course of a weekend. Pszeniczka testified that he never directed Menting to sell to any particular individual nor did he ask Menting to collect money on his behalf; as far as Pszeniczka was concerned, once Menting purchased the drags, Pszeniczka was uninterested in what Menting did with them. Further, Pszeniczka said that while he often asked other people to accompany him to Milwaukee or to stоre his drugs, he never made such requests of Ment-ing, whom Pszeniczka did not consider particularly reliable.
These activities ultimately came to the attention of law enforcement officials, who arrested Pszeniczka, Menting, Tushoski, and a handful of others and charged them with conspiring to distribute cocaine in violation of 21 U.S.C. § 846. (Pszeniczka was also charged with a variety of other crimes that are not at issue in this case.) Most of those charged pleaded guilty and testified, including Pszeniczka. Menting and Tushoski, however, chose to go to trial and were convicted by a jury. At sentencing, the district court found that both Menting and Tushoski had perjured themselves while testifying and therefore assessed a two-point upward adjustment to their base offense levels for obstruction of justicе under U.S.S.G. § 3C1.1. Menting’s conduct earned him a sentence of 108 months in prison, while Tushoski received a sentence of 94 months. Menting appeals both his conviction and sentence, and Tushoski challenges only the conviction.
II
The common issue in this appeal concerns the adequacy of the district court’s instructions on the distinction between a conspiracy and a mere buyеr-seller arrangement. In addition, Tushoski objects to the court’s instructions concerning multiple conspiracies, membership in a conspiracy, and his theory of defense. The district court did not overlook any of these subjects in its instructions. Our task therefore is to look at the charge as a whole and determine “whether the jury was misled in any way and whether it had a proper understаnding of the issues and its duty to determine those issues.”
United States v. Boykins,
At trial, both defendants conceded thаt they were guilty of repeatedly purchasing cocaine from Pszeniczka. In accordance
*927
with well-established law, they therefore argued that the relationship they had with Pszeniczka was simply that of buyer and seller for each discrete purchase, and that the sales were not made pursuant to an agreement to distribute. See,
e.g., United States v. Lechuga,
The existence of a mere buyer-seller relationship between a defendant and a conspirator, without more, is not sufficient to establish a defendant’s guilt. The government must prove that a defendant knowingly and intentionally joined the charged conspiracy, knowing the conspiracy’s aims and intending to achieve them. 1
The defendants complain that this instruction did not give the jury sufficient guidance on how to distinguish a member of a conspiracy from a mere buyer from the conspiracy. We disagree. While on the brief side, the court’s instruction did not misstate the law, nor did it mislead the jury. See, for example,
United States v. Turner,
We take this occasion to comment again that the government could avoid many of these problems simply by charging the defendants with the substantive crime of distribution, 21 U.S.C. § 841(a)(1), instead of conspiracy. Sеe,
e.g., United States v. Thomas,
Tushoski individually also objects to the district court’s rejection of his proposed jury instructions on “Multiple Conspiracies,” “Mеmbership in the Conspiracy,” and “Theory of Defense.” This argument does not warrant extensive discussion. Once again, the district court instructed the jury on each of these three topics. Because the court’s instructions were both correct statements of
*928
the law and supported by the record, they should not be disturbed on appeal. See
Boykins,
Ill
Next, Menting argues that the evidenсe against him is insufficient to support a conspiracy conviction. Before we address the substance of his claim, we pause to discuss the government’s improper reliance on the defendants’ presentence reports (“PSR”) in its brief to this court to support its statement of facts. In reviewing a defendant’s challenge to the sufficiency of the evidence on aрpeal, we ask whether a reasonable fact finder, based upon the evidence
■presented to it,
could have found guilt beyond a reasonable doubt.
United States v. Taylor,
By citing to information not in the trial record, the government’s brief violates Federal Rule of Appellate Procedure 28, which requires that a party’s statement of relevant facts include “appropriate” record citations. Fed. R.App. P. 28(a)(4), (b). We require such record citations to relieve this court of the burden of scouring the record for support for a litigant’s claims. In deciding this appeal, we ignored — as we must — the government’s citations to the PSRs and relied only on the trial transcript. Because the government failed to cite to portions of the record suitable for our consideration, we were forced to undertake an extensive search of the record, a burden we should not have had to shoulder.
Moving on to the merits of Ment-ing’s appeal, we note once again that a sufficiency of the evidence challenge is hard to win, given the standard of appellate review. We consider the evidence in the light most favorable to the government, and we must affirm the conviction so long as any rational factfinder could have found the essential elements of the offense to have been established beyond a reasonable doubt.
Taylor,
This is not such a record. As we have already noted, to sustain a conspiracy conviction the government-had to prove an agreement to achieve a criminal objective beyond the agreement to purchase cocaine.
Lechuga,
Here, there is no doubt that a rational trier of fact could have found that the government established the essential elements of conspiracy beyond a reasonable doubt. The government presеnted evidence that for sev *929 eral years Menting regularly and frequently purchased cocaine from Pszeniczka; that Menting and Pszeniczka established a routine whereby Menting telephoned orders for his fellow bar patrons and Pszeniczka either delivered the requested drugs to the bar or had Menting pick them up at Pszeniczka’s home; that on Menting’s request, Pszeniczka prepackaged the drugs for individual consumption; that Pszeniczka knew Menting was purchasing for resale; and that Pszen-iezka occasionally sold Menting drugs on credit. All of this evidence points toward the conclusion reached by the jury, that Menting and Pszeniczka conspired together to distribute cocaine.
For its part, the defense relies on evidence that Pszeniczka did not believe Menting wаs reliable and that Menting accordingly played a relatively insignificant role in Pszeniczka’s operations. This evidence cannot rescue Menting; at the very most, it suggests that another rational jury might have seen the case more favorably to him. As
Pearson
explains, the absence of one factor — here, mutual trust — does not preclude us from affirming a jury verdict when other factors рoint to a conspiracy.
Pearson,
IY
Finally, Tushoski argues that the district court erred when it found that he perjured himself at trial and therefore deserved a two-level increase in the base offense level for obstruction of justice under Sentencing Guideline § 3C1.1. We review the district court’s factual findings with respect to the obstruction of justice enhancement for clear error.
United States v. Godinez,
The guideline аuthorizes a two-point enhancement for obstruction of justice if the sentencing court finds by a preponderance of the evidence that the defendant “willfully impeded or obstructed ... the administration of justice during the investigation, prosecution, or sentencing of the instant offense.” U.S.S.G. § 3C1.1. This enhancement applies when a defendant provides false testimony at his own trial “сoncerning a material matter with the willful intent to provide false testimony, rather than as a result of confusion, mistake, or faulty memory.”
United States v. Dunnigan,
Here, the district court independently determined that Tushoski committed perjury. It found that Tushoski had lied, noting that his testimony was directly contradicted by three witnesses the court found credible. The court concluded that Tushoski’s attempt to obstruct justice was willful in that “the testimony of defendant Tushoski was carefully orchestrated to address only evidence which he knew the jury could not disregard.” We see no clear error in these determinations, which dooms Tushoski’s challenge to the obstruction of justice enhancement.
Tushoski attempts to muddy the waters by arguing that the “two-witness rule” of the federal criminal perjury statute, 18 U.S.C. § 1621, applies here. To prove that a defendant gave false testimony in violation of 18 U.S.C. § 1621, the government faces a heightened evidentiary standard: the government must provide either the testimony of two witnesses, or the testimony of one witness and “sufficient corroborative evidence.”
United States v. Chaplin,
It is well established that the Federal Rules of Evidence do not apply at sentencing and that the sentencing court is free to consider a wide range of information, including hearsay evidence, that may have been inadmissible at trial.
United States v. Beler,
*930
For the reasons stated, we Affirm both defendants’ convictions and Tushoski’s sentence.
Notes
. Menting, for example, wanted the following instruction, which strikes us as not only “confusing” but affirmatively wrong in places as a matter of law: "Merely purchasing cocaine from a conspiracy, standing alone, can never establish a membership in the conspiracy. A sale of cocaine, by definition, requires two participants; their combination for that purpose does not show that they have agreed to do anything other than complete the transaction. Insofar as there is an agreement between the сonspirators merely on the one side to sell and on the other to buy, there is no conspiracy between them no matter what the buyer intended to do with the drugs after he bought them. The crime of conspiracy focuses on agreements. The government must prove that the accused Patrick Menting knew of the agreement alleged in the indictment and intentionally joined in it.” We note, tautologically, that it can literally never be error for a district court to refuse to give a legally incorrect instruction.
