A federal jury found Christopher Beaver guilty of participating in a price-fixing conspiracy, 15 U.S.C. § 1, and making false statements to a federal law enforcement agent who was investigating that conspiracy, 18 U.S.C. § 1001(a)(1). Beaver challenges his convictions on appeal, arguing that the government failed to prove at trial that a price-fixing conspiracy existed, that he joined the conspiracy, or that he made false statements. We affirm.
I. History
In October 2003, Gary Matney, a manager at the Indianapolis office of Prairie Material Ready-Mix Concrete, approached the Federal Bureau of Investigation to report the existence of a price-fixing conspiracy involving several of Prairie Material’s competitors. According to Matney, Prairie Material was being pressured to join the conspiracy, a claim that led the FBI to investigate the pricing activities of five ready-made concrete producers in the Indianapolis metropolitan area: (1) Shelby Materials, Inc.; (2) Builder’s Concrete & Supply Co., Inc.; (3) Irving Materials, Inc.; (4) Hughey, Inc.; *733 and (5) Ma-Ri-Al, which does business as Beaver Materials Corp. The investigation reached a turning point on May 25, 2004, when FBI agents executed search warrants on the five companies, and interviewed the companies’ corporate officers and employees regarding the existence of the conspiracy. Information recovered at that time substantiated many of Matney’s claims, and set into motion a chain of events that would mark the demise of the price-fixing scheme. Shelby Materials’s Vice-President, Richard Haehl, immediately admitted his criminal conduct and offered to help the government investigate the cartel; the government, in turn, granted Haehl amnesty conditioned on his continued cooperation and, if required, truthful testimony at trial. Shortly thereafter, the government charged Builder’s Concrete, Irving Materials, and Hughey, Inc., and their respective corporate officers, Gus “Butch” Nuckols, Price Irving, and Scott Hughey with participating in the scheme. Nuckols, Irving, and Hughey eventually admitted their roles in the conspiracy and entered into plea agreements, in which they, too, offered to help the government investigate the cartel and testify truthfully at trial if called.
Upon enlisting the cooperation of Haehl, Nuckols, Irving, and Hughey, the government sought an indictment against Beaver Materials and its corporate officers. The government’s efforts paid off in April 2006, when a federal grand jury returned a four-count indictment against Beaver Materials, Ricky Beaver — the company’s Commercial Sales Manager — and Christopher Beaver — the Operations Manager. Two of the counts were directed at Christopher. First, the indictment charged Christopher with participating in a price-fixing conspiracy in violation of § 1 of the Sherman Antitrust Act. Specifically, the indictment alleged that he met with competitors at “a horse barn owned by Gus B. Nuckols, III a/k/a Butch Nuckols, president of Builder’s Concrete and Supply Co.,” at which they agreed to increase prices, limit discounts, and implement surcharges; carried out and enforced their agreement; and attempted to conceal the conspiracy.
See
15 U.S.C. § 1. The indictment also charged Christopher with making false statements regarding his participation in the conspiracy to an FBI agent who investigated it.
See
18 U.S.C. § 1001(a)(1). Unlike their alleged cohorts, Christopher, Ricky, and Beaver Materials eschewed plea agreements and instead exercised their rights to a jury trial, at which the three were tried jointly.
1
The evidence introduced at trial, which we review in a light most favorable to the government,
see United States v. Andreas,
The government presented the testimony of Haehl, Nuckols, Irving, and Hughey, who each provided details as to the origins of the price-fixing conspiracy and Christopher Beaver’s role within the scheme. The men explained that, at the turn of the century, the ready-made-concrete market in the Indianapolis area was extremely competitive. The market was primarily occupied by eight concrete producers that often vied for the same customers by bidding on their construction projects. The companies’ bidding and pricing processes were largely uniform. At the beginning of *734 construction season in the spring of each year, the producers would send price lists to potential clients to inform them of the lowest possible rates at which they could provide concrete. The price lists usually featured five dollar amounts that went into the calculation of the quoted price. First, there was the base price — or, as it was called, the gross price — of the desired amount of a particular mix of concrete. Next, the price list provided the available discount off the gross price for promptly submitting payment; the price list then deducted this discount, which yielded the net price. But the producers’ net prices were identical more often than not, so to distinguish themselves and undercut their competition the producers would include a fourth dollar amount on the price list: an additional discount from the net pnce. The producers would then calculate and quote to potential clients the resulting discounted net price as the lowest price at which they could provide the concrete. But as the competition for customers grew over the years, the producers offered increasingly larger net-price discounts that, in turn, depressed the market value of concrete, and, consequently, reduced the producers’ overall profits.
The four men each continued that, in July 2000, Nuckols decided that it was time to address the falling market value of concrete. He accordingly organized a meeting at his horse barn in Fishers, Indiana, of corporate officers of area concrete producers so they could discuss methods of “getting the price up.” The meeting was attended by, among others, Haehl, Irving, Hughey, and Beaver Materials’s representative, Ricky Beaver. All those present discussed ways in which they could “stabilize the market,” leading someone (it is not exactly clear who) to propose a $5.50 limit on each producers’ gross-price discount for a cubic yard of concrete; the gross-price-discount limit, in turn, translated to a net-price-discount limit of $3.50 per cubic yard. Although no vote was taken on the proposal, no one in attendance objected to it, nor did anyone refuse to impose the limit; as Haehl described it, “Nobody objected, nobody disagreed, nobody walked away.” Indeed, each witness testified that he left the meeting with the firm understanding that an agreement to limit net-price discounts had been reached.
However, each of the four co-conspirators stated, the members of the concrete cartel did not always abide by their agreement. This periodic cheating contributed to the continuing downward spiral of concrete market prices, despite the cartel’s efforts. As a result, individual members of the cadre separately met with each other at various times and locations to shore up the plan. But when those meetings failed to raise the price of concrete, Nuckols and Hughey called a second meeting of the entire cartel in May 2002, this time at the Signature Inn in Fishers. Every company participating in the cartel was represented, and, again, Nuckols, Haehl, Irving, Hu-ghey, and Ricky Beaver attended. The purpose of the meeting was, as Haehl described it, “to just reaffirm” the agreement to limit their net-price discounts at $3.50. Just like at the earlier meeting at Nuck-ols’s horse barn, no one objected to imposing the limit. Moreover, those in attendance all agreed to a method of enforcing the limit: if they became aware that another cartel member was offering a net-price discount greater than $3.50, they would confront that producer about his cheating. And based, in part, on this plan, the meeting at the Signature Inn ended with Haehl, Nuckols, Irving, and Hughey each believing the attendees had reaffirmed the discount limit.
The four witnesses each continued to testify that in the days after the meeting *735 at the Signature Inn, they attempted to enforce the net-price-discount limit by contacting those producers whom they believed were cheating on the cartel agreement. In fact, each man stated that, at one time or another they either confronted someone whom they believed was cheating, or were themselves accused of cheating. Nevertheless, their efforts to police the scheme proved incapable of reversing the downward spiral of concrete prices; as Nuckols testified, in the days following the meeting “our prices just were not doing well and they were going in the gutter.” So Nuckols arranged another meeting at his horse barn in October 2003 to discuss the discount limits further. Haehl, Irving, and Hughey again attended, but this time Ricky Beaver did not; as it turned out, Ricky had not accurately conveyed the details of the agreement to the appropriate individuals at Beaver Materials. As Price and Hughey elaborated, Beaver Materials underbid Hughey, Inc., on two separate occasions after the July 2000 meeting, causing Hughey to telephone Christopher Beaver directly and ask him if Beaver Materials was cheating. Christopher, according to Hughey, denied that was the case, and stated that “he was at the discount that was established in the agreement with everyone.” But, apparently, Ricky was confused about that discount, leading him to provide Christopher with the wrong information, and, in turn, causing Beaver Materials to quote prices in dereliction of the agreement. Therefore, to avoid the potential for any further confusion, Christopher took over representing Beaver Materials.
The four co-conspirators each further testified that the October 2003 began with Hughey bemoaning the fact that no one was abiding by the agreement, and urging those who did not want to follow the agreement to leave the meeting. Hughey recounted his exhortation: “ “You know, guys, this thing is not being adhered to. And we need to decide are we going to agree on this and do what we say we’re going to or just walk on out of here.’ ” But no one walked out. Instead, Hughey’s lecture spurred a discussion among all the attendees — including Christopher Beaver — during which they again reassured one another that they each would limit their discounts to $3.50 off of the net price. The discussion did not end there, however. The group also agreed to increase the net price of each cubic yard of performance-mix concrete by $2, and by $2.50 for each cubic yard of bag-mix concrete. They further agreed to add a collective $2-per-cubic-yard surcharge for all concrete produced in the winter. Moreover, those present reasserted their commitment to police the agreement by confronting apparent cheaters.
Just like at the two earlier meetings, Haehl, Nuckols, Irving, and Hughey each stated that they understood that the attendees at the October 2003 meeting agreed to limit their net-price discounts to $3.50, in addition to adopting additional pricing restraints. No one present at the meeting — Christopher Beaver included — objected to the net-price-discount limit. Even more, Hughey testified, Christopher volunteered to contact the manager at American Concrete, another Indianapolis ready-made-concrete producer that was not represented at the meeting, “ ‘and get him the message on what we agreed on.’ ”
After each of the four co-conspirators testified, the government presented the testimony of several FBI agents who recounted the agency’s investigation into the concrete cartel. As relevant here, Special Agent Neil Freeman testified that when the FBI conducted its searches and interviews on May 25, 2004, he questioned Christopher Beaver regarding the existence of the conspiracy; different FBI *736 agents simultaneously interviewed Ricky Beaver and Allyn Beaver, Christopher’s father and company President. During their conversation, Christopher stated that he had been employed by Beaver Materials for 21 years, and that in the “last couple years” he had become more involved in the pricing of the company’s products because he would soon be replacing his father as President. When Freeman asked Christopher if he had attended any meetings at Nuckols’s horse barn, Christopher answered, “No.” Christopher also stated that he did not know of any other employee of Beaver Materials having attended such a meeting. He further told Freeman that he saw Beaver Materials’s competitors only when attending meetings of the industry trade group, the Indiana Ready-Mix Association. In all, Freeman stated, Christopher “denied being involved with any kind of discussion of price fixing,” and further disavowed ever meeting with any of the competing producers to discuss pricing and discount agreements.
The government rested its case after it presented the evidence regarding the origins of the price-fixing conspiracy, Christopher Beaver’s participation, and his statements to Special Agent Freeman. Christopher then moved for a judgment of acquittal on the basis that the government had failed to introduce “any kind of evidence that would indicate that [Christopher] joined the conspiracy.” See Fed. R.Crim.P. 29(a). After the district court denied the motion, Christopher presented the testimony of his sole witness — Chuck Mosely, who worked at Beaver Materials from 1991 until 2006 as a concrete salesman. Mosely testified that, during his time as a salesman, Christopher never told him how to price concrete. However, Mosely also stated that he knew that Christopher attended “a price fixing meeting at Butch Nuckols’s horse barn.”
Beaver Materials, on the other hand, presented the testimony of Allyn Beaver and Charles Sheeks, Beaver Materials’s corporate counsel. Allyn testified that Christopher Beaver had some influence over the company’s prices, including the authority to authorize certain discounts. Allyn also stated that he was unaware of any price-fixing agreement between Beaver Materials and its competitors, though he did know that Ricky Beaver had been communicating with some of the other area concrete producers. Moreover, Allyn testified that he knew that Christopher had attended the October 2003 meeting at Nuckols’s horse barn, that Christopher told him that those in attendance talked about prices, and that “the way that the meeting was going,” it seemed like that the attendees “must be doing this all the time.” However, Allyn did not know whether Christopher entered into any agreement with Beaver Materials’s competitors.
Sheeks then testified that the day after the FBI conducted its interviews, he met with Christopher Beaver, Ricky Beaver, and Allyn Beaver at Beaver Materials’s corporate office. There, Christopher and Ricky told Sheeks that they lied to the FBI about their presence at the meetings at Nuckols’s horse barn. In response to this news, Sheeks sent a letter to the Department of Justice on May 28, in which he stated only that “[o]ne of the employees of my client made a misstatement to one of your agents to the effect he had not attended a meeting at what has been referred to as ‘Butch’s barn.’ He did, in fact, attend the meeting.”
After the defense rested the district court submitted the case to the jury, which found Christopher Beaver guilty on both the price-fixing-conspiracy and false-statements counts. 2 Christopher then renewed *737 his motion for a judgment of acquittal, see Fed.R.Crim.P. 29(c), challenging the evidence supporting his price-fixing-conspiracy conviction, but not his conviction for making false statements. After the court denied the motion, it sentenced Christopher to 27 months’ imprisonment.
II. Analysis
Christopher Beaver raises two arguments on appeal. First, he argues that the district court erred by denying his motion for a judgment of acquittal because, he asserts, the government failed to prove at trial that a price-fixing conspiracy existed, or that he participated in the conspiracy. Christopher also challenges his false-statements conviction by asserting that the government failed to prove that the lies he told to Special Agent Freeman were material “as a matter of law.” We address these arguments in turn.
A. The Existence of, and Christopher Beaver’s Participation in, the Price-Fixing Conspiracy
To prevail on his argument that the district court erred by denying his motion for a judgment of acquittal, Christopher Beaver must show that the court incorrectly concluded that there was sufficient evidence to sustain his conviction under the Sherman Antitrust Act.
See
Fed.R.CrimJP. 29(a);
Andreas,
Christopher Beaver attempts to shoulder this burden by arguing that the government failed to prove that the concrete producers agreed to restrict their discounts on the net prices of concrete. Specifically, he contends that the evidence at trial showed that “no person voiced their assent to the supposed conspiracy.” Thus, according to Christopher, the government failed to establish that the producers entered into an agreement in the first place. 3
To prove a violation of § 1 of the Sherman Antitrust Act, the government had to introduce evidence showing that the concrete producers conspired to restrain trade,
see
15 U.S.C. § 1;
United States v. Socony-Vacuum Oil Co.,
The government introduced ample evidence at trial that showed that the concrete producers shared a “tacit understanding” that they were to limit their net-price discounts collectively. In fact, the trial record is replete with details regarding the cartel’s meetings in July 2000, May 2002, and October 2003, at which the producers discussed the net-price-discount limit, policing the limit, and other price restraints. Haehl, Nuckols, Irving, and Hughey each testified that, beginning in July 2000, the entire cartel met on at least three occasions with the known purpose of addressing the falling price of concrete. During each of those meetings, the competitors discussed the ways in which they could “stabilize the market,” leading to the proposed net-price-discount limit. And although no formal vote was taken on the discount limit, no one disagreed with the proposal or stated that he would not participate in the scheme. Indeed, when Hu-ghey gave the producers the opportunity to oppose the price-fixing arrangement and leave the conspiracy, “Nobody objected, nobody disagreed, nobody walked away.” Instead, the producers discussed additional methods of aligning their pricing practices, such as instituting general price increases and a winter surcharge. And based on these meetings and related discussions, Haehl, Nuckols, Irving, and Hu-ghey each understood that an agreement was reached.
See Andreas,
Moreover, Haehl, Nuckols, Irving, and Hughey each testified that the concrete producers’ communications were not limited to the July 2000, May 2002, or October 2003 meetings; they also enforced the discount restraint by confronting those who were cheating on the cartel. Each witness also testified that, on various occasions, they either confronted someone whom they believed was cheating or were themselves accused of cheating. Hughey likewise stated that on two separate occasions Christopher Beaver reassured him that Beaver Materials was abiding by the discount limit. In the face of this evidence, Christopher’s assertion that “no person voiced their assent to the supposed conspiracy” rings hollow. Such assent was voiced when the co-conspirators either confronted others about cheating on the cartel, or reassured others — like Christopher did — that they were abiding by the agreement.
See Beachner Constr. Co.,
Christopher Beaver asserts, however that the concrete producers’ occasional cheating on the discount limit shows that no agreement was ever reached. But this argument is illogical; certainly Christopher would agree that a breach of contract does not mean that the parties never entered into the contract in the first place. And the argument is also beside the point because § 1 of the Sherman Antitrust Act does
not
outlaw only perfect conspiracies to restrain trade. It is not uncommon for members of a price-fixing conspiracy to cheat on one another occasionally, and evidence of cheating certainly does not, by itself, prevent the government from proving a conspiracy.
See, e.g., Andreas,
Christopher Beaver continues his challenge to the sufficiency of the evidence underlying his price-fixing-conspiracy conviction by arguing that the government failed to show that he personally participated in the cartel. In Christopher’s view, the testimony of Haehl, Nuckols, Irving, and Hughey implicating him in the conspiracy was not credible because “no two competitors said anything as a whole which would corroborate the testimony of the others.” But this argument fails from the start. “We will not second-guess the jury’s credibility decisions in evaluating [Christopher’s] challenge to the sufficiency of the evidence,”
United States v. Johnson-Dix,
But the credibility of Haehl, Nuckols, Irving, and Hughey aside, their testimony sufficiently implicated Christopher Beaver in the conspiracy. Specifically, each man testified that Christopher (1) was present at the October 2003 meeting at Nuekols’s horse barn; (2) participated in discussions on how to limit the price of concrete; (3) did not object to the net-price-discount limit; (4) agreed to confront other conspir-aey members if he found them cheating on the agreement; and (5) agreed on additional pricing constraints. Moreover, Hu-ghey testified that, at the meeting, Christopher volunteered to contact the manager at American Concrete “and get him the message on what we agreed on.”
Looldng beyond the testimony of Haehl, Nuckolg) Irving> and Hughey, the uncon_ tradicted evidence regarding Christopher Beavei,g responsibilities at Beaver Materi- ^ further Msters the jury,s conclusion ^ he participated the conspiracy, Christopher admitted to Special Agent Freeman that, as Operations Manager, he was involved in the pricing of the company’s products, a role that would have al
*740
lowed the jury to infer that Christopher was able to effectuate the net-price-discount limit. This inference is further supported by Hughey’s testimony that he spoke with Christopher personally on two occasions, and that during those conversations Christopher reaffirmed Beaver Materials’s commitment to the discount limit. And the testimony of both Mosely and Allyn Beaver failed to contradict the evidence of Christopher’s involvement. Both men stated that they knew that Christopher had met with competitors at Nuck-ols’s horse barn in October 2003, and Allyn further stated that Christopher told him that pricing was discussed at that meeting. We thus cannot say that the government failed to prove that Christopher participated in the price-fixing conspiracy, or that the district court erred by denying his motion for a judgment of acquittal.
See Andreas,
B. Christopher Beaver’s False Statements
Christopher Beaver next challenges his conviction under 18 U.S.C. § 1001(a)(1) for falsely stating to Special Agent Freeman that neither he, nor Beaver Materials, participated in the price-fixing conspiracy. Specifically, Christopher argues that the government did not prove that his statements were material “as a matter of law.” As he explains, the government needed to show at trial that his statements to Freeman were material,
see
18 U.S.C. § 1001(a)(1);
United States v. Moore,
Before we weigh the merits of Christopher Beaver’s argument, however, we must take a moment to alleviate the confusion that apparently exists regarding his challenge. Specifically, Christopher mischaracterizes the issue of his false statements’ materiality as “a matter of law.” But the materiality of false statements is not a legal determination; it is, rather, a factual determination that is made by the jury only. As the U.S. Supreme Court explained in
United States v. Gaudin,
The government, in turn, contends that Christopher Beaver has “waived” any challenge to the sufficiency of the evidence supporting his false-statements conviction. As the government points out, Christopher did not challenge the evidence showing that he lied to Special Agent Freeman either when he moved for a judgment of acquittal at the close of the government’s case, or when he renewed his motion after the jury’s verdict; instead, he challenged only the evidence supporting his price-fixing-conspiracy conviction. Thus, the government asserts, Christopher intentionally relinquished the argument that insufficient evidence supported his false-statements conviction by failing to raise it specifically before the district court, and that such a “waiver” precludes our review of this argument.
The government is correct that Christopher Beaver “waived” his sufficieney-of-the-evidence argument regarding his false-statements conviction.
See United States v. Groves,
Moving (finally) to the merits of Christopher Beaver’s argument, we reject his assertion that his false statements were not capable of influencing the FBI’s investigation because his attorney, Sheeks, contacted the Department of Justice to correct the statements before the FBI could actually be influenced by them. In fact, the argument fails for several reasons. First, the record does not even support Christopher’s contention that he attempted to correct his false statements. The letter Sheeks sent to the Department of Justice did not say that Christopher made false statements to the FBI; the letter merely stated that “one of the employees” of Beaver Materials “misstated” that “he” was not at a meeting at Nuck-ols’s horse barn. This “correction” could be understood as referring to Christopher, Ricky Beaver, Allyn Beaver, or any employee at Beaver Materials that spoke with FBI agents on May 25, 2004, but not as an admission by Christopher, himself, that he misled the FBI. Instead, the letter’s vague language perpetuated Christopher’s lies by implying that someone else had misled the FBI.
Moreover, Christopher Beaver is incorrect that he can avoid a conviction under § 1001 by correcting his false statements days after he spoke them. Contrary to Christopher’s suggestions, § 1001 contains no recantation defense.
See United States v. Sebaggala,
Because § 1001 contains no recantation defense, the materiality of Christopher Beaver’s false statements must be assessed at the moment he uttered them.
See United States v. Lee,
III. Conclusion
We AffiRM Beaver’s price-fixing-conspiracy conviction under 15 U.S.C. § 1, and his false-statements conviction under 18 U.S.C. § 1001(a)(1).
Notes
. Beaver Materials was charged with one count of participating in the price-fixing conspiracy. Like Christopher Beaver, Ricky Beaver was charged with participating in the conspiracy and making false statements to the FBI. Also named in the indictment was John Blatzheim, Executive Vice-President of Builder’s Concrete. Blatzheim was likewise charged with participating in the conspiracy and making false statements to the FBI. However, he pled guilty to the price-fixing conspiracy charge pursuant to a plea agreement, in which the government, in turn, agreed to move to dismiss the false-statements charge. The district court subsequently granted the government’s motion and dismissed the false-statements charge against Blatzheim.
. The jury also found Beaver Materials and Ricky Beaver guilty on all counts.
. Although Christopher argues that the government failed to show that the concrete producers agreed to limit their net-price discounts, he abandons any challenge to the illegality of the agreement itself.
See Crestview Vill. Apartments v. U.S. Dep’t of Hous. & Urban Dev.,
. In all, the government was required to prove at trial that (1) Christopher Beaver made a statement, or had a duty to disclose the information; (2) the statement was false, or that Christopher undertook acts amounting to concealment; (3) the statement or concealed facts were material; (4) Christopher made the statement or concealed the facts knowingly and willfully; and (5) the statement or concealed information concerned a matter within the jurisdiction of a federal department or agency.
See
18 U.S.C. § 1001(a)(1);
Moore,
. Beaver also asks us to grant him "amnesty” to reward the "affirmative steps” he took "to alleviate the harm” caused by his lies. But for the same reasons we will not impute a recantation defense into § 1001,
see Sebaggala,
