Antonio Thomas, an attorney, appeals his conviction on one count of endeavoring to obstruct justice in violation of 18 U.S.C. § 1503 by testifying falsely in a federal civil proceeding with knowledge of a pending grand jury investigation. The government concedes that a new trial is warranted because the trial court failed to charge the jury that the alleged false testimony had the effect of obstructing justice. *649 Thomas contends that the government is barred from retrying him on this count because there was insufficient evidence that his allegedly false testimony had such an effect. We hold that the trial court must instruct a jury that the government must prove the alleged statements had the natural and probable effect of obstructing justice. We reverse, however, because we conclude that the evidence was insufficient to support a conviction.
FACTS
Thomas was one of the many fish caught in the broad net the government cast over a narcotics trafficking enterprise that was managed and controlled by Rolland Callahan, Jr. 1 The ninety-nine page, thirty-seven count indictment charged Callahan and sixteen other individuals with various offenses relating to the operation of the narcotics conspiracy and the concealment of its activities. Thomas, one of Callahan’s attorneys, and Richard Rose, one of Callahan’s accountants, were tried together on various counts relating to allegations that they assisted Callahan’s narcotics enterprise in concealing, investing, and laundering drug proceeds. Following a jury trial, Rose was acquitted of all twenty of the counts with which he was charged. Thomas was acquitted of seventeen of the eighteen counts with which he was charged, including various counts of racketeering, conspiracy to possess with the intent to distribute drugs, conspiracy to defraud the United States, mail fraud, and money laundering. The sole count on which Thomas was convicted, obstruction of justice in violation of 18 U.S.C. § 1503, is the subject of this appeal.
Because we are reviewing Thomas’s conviction for sufficiency of the evidence, we present the facts in the light most favorable to the government. The section of the indictment relating to the obstruction of justice count alleged that Thomas
knowing there was a Federal Grand Jury investigating ROLLAND CALLAHAN, JR., [did] corruptly endeavor to influence, obstruct, and impede the due administration of justice by willfully, knowingly, intentionally, and falsely testify [sic] under oath in the civil trial of the State of Georgia v. Six Hundred Forty Thousand, Seven Hundred and Sixty-Eight Dollars in U.S. Currency, Case No. C85-1700A, then pending in the United States District Court, Northern District of Georgia, before the Honorable Horace T. Ward, United States District Judge.
The alleged false testimony which provided the entire basis for the obstruction of justice count was the following exchange before Judge Ward:
ROBERT WILSON [Attorney for Dekalb County]: Do you know the intervenor in this case, Mr. Rolland Callahan?
THOMAS: I know Rolland Callahan, yes.
WILSON: Have you ever known him by any other name other [sic] than Rolland Callahan?
THOMAS: No, I have not.
WILSON: Have you ever known him by the name of Robert Johnson?
THOMAS: No, I have not.
WILSON: Have you ever introduced him to anyone as Robert Johnson?
THOMAS: Not that I recall.
In an effort to prove that Thomas’s testimony constituted the obstruction of justice, the government introduced evidence attacking the truthfulness and accuracy of Thomas’s assertions. The evidence revealed that Callahan had used the name of his wife’s ten year old son, Robert Johnson, in negotiating a shopping center construction contract with Weyman Bearden, a builder. Subsequently, Callahan had entered into another contract with Bearden for the construction of a new home. Callahan brought the contract he negotiated with Bearden for the home to Thomas, and informed Thomas that he wanted the home to be in the name of Robert Johnson. In a meeting at Thomas’s office where the con *650 tract was signed by Thomas as the attorney for Robert Johnson, Bearden referred to Callahan and his wife as Mr. and Mrs. Johnson. Bearden testified that, based upon his prior transaction with Callahan, he believed Callahan to be Robert Johnson. Thomas, although present when Bearden referred to Callahan as Robert Johnson, made no effort to inform Bearden of Callahan’s true identity.
The government presented no evidence, however, that Thomas introduced Callahan to Bearden as Robert Johnson or at any other time represented Callahan to be Robert Johnson. In fact, the government’s prime witness, Rolland Callahan, testified that Thomas never introduced him to anyone by any name other than “Mr. Callahan or Cal.” Additionally, Callahan testified that he had not informed Thomas that he was representing himself to Bearden as Robert Johnson. 2 Callahan’s wife, Jamie Willis Callahan, also testified for the government and stated that she had not told Thomas that she and her husband were holding themselves out as Mr. and Mrs. Robert Johnson.
The district court charged the jury that they could find Thomas guilty of the obstruction count if the government proved the following facts beyond a reasonable doubt:
First, that the federal grand jury and the federal district court were conducting proceedings [relating to Callahan]; second, that the defendant endeavored to influence, intimidate or impede such proceedings; and, third, that the defendant's acts were done knowingly and corruptly.
The court followed this instruction by stating that “it is not necessary for the government to prove that any grand juror or trial judge was in fact swayed or changed or prevented in any way from administering justice, only that the defendant corruptly attempted to do so.” Thomas’s appeal follows from his conviction on this count of obstructing justice.
DISCUSSION
The defendant was prosecuted under the omnibus clause of the obstruction of justice statute.
3
This clause subjects to criminal liability any individual who “corruptly or by threats or force, or by any threatening letter or communication, influences, obstructs, or impedes, or endeavors to influence, obstruct, or impede, the due administration of justice.” 18 U.S.C. § 1503. The omnibus clause is broad enough to encompass “any act committed corruptly, in an endeavor to impede or obstruct justice.”
Brand,
In order to convict an individual under the omnibus clause, the government must prove that he (1) corruptly or by threats, (2) endeavored, (3) to influence, obstruct, or impede the due administration of justice.
Brand,
The “endeavor” element of the offense describes any attempt or effort to obstruct justice.
See Brand,
The final element of a section 1503 violation describes the characteristics of the conduct prohibited by the statute. Under the omnibus clause, an individual is prohibited from engaging in any activity constituting an effort to influence, obstruct, or impede the due administration of justice. The action taken by the defendant does not need to directly and immediately obstruct justice to be prohibited by section 1503. The defendant’s conduct must be such, however, that its natural and probable effect would be the interference with the due administration of justice.
Fields,
*652
The requirement that the government establish that the defendant’s conduct has a probable effect of obstructing justice is particularly critical in section 1503 prosecutions premised on false testimony. We have held consistently that false testimony can provide the basis for a conviction under section 1503.
Perkins,
To show an obstruction of justice based on false testimony, the government must establish a nexus between the false statements and the obstruction of the administration of justice.
See In re Michael,
Because proof that the false testimony was of the kind having a probable effect of obstructing justice is critical in distinguishing a section 1503 offense from mere perjury, the trial court must clearly and explicitly instruct the jury of the necessity of finding this relationship between the statements and obstruction.
See Perkins,
Thomas failed to request or object to the absence of this instruction at trial. Therefore, we will not reverse his conviction on this ground unless we find that the failure to provide the jury with this instruction was plain error.
United States v. Perez-Garcia,
In reviewing a conviction for sufficiency of the evidence this court must consider the evidence in the light most favorable to the government and determine whether the jury could have found the defendant guilty beyond a reasonable doubt.
United States v. Hernandez,
After carefully reviewing the record, we are persuaded that the facts as proven by the government are insufficient to support the jury verdict. As a threshold matter, we are not even convinced that the government established that Thomas’s testimony was false.
Cf. Brand,
The weakness in the government’s case becomes strikingly evident upon reviewing the portion of Thomas’s cross examination during the trial below when the prosecutor tried to establish the basis for Thomas's false testimony by stating “You indicated in front of Judge Ward that you had never known Rolland Callahan to go by any other name?” Hád Thomas, in fact made such a statement to Judge Ward, we could find that the government presented sufficient
*654
evidence to establish that the testimony was false. The transcript of Thomas’s responses before Judge Ward, however, indicates that he was never asked such a question by the government. Thomas was asked whether he knew Callahan by any other name, not whether he knew that Callahan went by any other name. The distinction between the two questions is critical because only the second clearly asks Thomas whether he knew Callahan to have ever held himself out to
anyone
by any other name. The first question, and the one that Thomas was in fact asked, may reasonably be interpreted as asking whether Callahan had ever represented himself to
Thomas
by any other name. To infer from the vague question Thomas was asked that he falsely stated that he did not know Callahan to go by any other name “would require conjecture and innuendo, not a basis upon which this Court can rely to sustain a ... conviction.”
United States v. Hardy,
Moreover, even if we believed that a jury could reasonably find that Thomas testified falsely beyond a reasonable doubt, the government’s case still fails because no evidence was introduced that the statements had a natural and probable effect of impeding justice. The government’s proof at trial of the section 1503 violation was limited to evidence that Thomas knew that Callahan represented himself as Robert Johnson to other individuals. The prosecution did not introduce a shred of evidence from which the jury could infer that the allegedly false testimony before Judge Ward had the potential of obstructing justice. Nor did the government put forward any evidence to show that Thomas’s statements had the natural and probable tendency of impeding the grand jury’s investigation of Callahan or Judge Ward’s civil forfeiture trial relating to Callahan’s property.
See, e.g., Brand,
On appeal, the government now contends that Thomas’s allegedly false testimony had the potential of obstructing justice in three ways. First, the “false” testimony hindered the State of Georgia’s ability to prove, in the civil forfeiture trial, that Callahan’s income was derived from large scale drug dealing. As a result, the government argues, the State of Georgia did not receive a favorable ruling from Judge Ward. Second, “truthful testimony would have led to an expeditious ruling by Judge Ward who otherwise delayed a ruling for a number of months due to the paucity of evidence for the State.” Brief for Appellee at 25. Finally, the government argues that Thomas’s testimony delayed the grand jury’s return of an indictment against Callahan and his associates.
The government’s conclusory, highly speculative, and inherently implausible assertions of the statements’ tendency to obstruct justice are inadequate to sustain Thomas’s conviction.
Cf. Hardy,
*655 CONCLUSION
Because we find insufficient evidence to sustain Thomas’s conviction for obstruction of justice, his conviction is REVERSED.
Notes
. Pursuant to a negotiated agreement, Callahan pled guilty to RICO conspiracy, engaging in a continuing criminal enterprise, mail fraud, conspiracy to defraud the United States, subscribing tó a false tax return, and transporting currency in contravention of the applicable reporting requirements.
. Callahan’s testimony on this point is particularly significant.
GEORGE LAWSON [Thomas's attorney]: So, at the time you all sat down and Mr. Thomas was looking at this document for whomever, there was no formal introduction at that meeting as to who you were or who you were not, was there?
CALLAHAN: No; no. No, Mr. Bearden already — you know, had already known that I was Robert Johnson as far as he knew....
LAWSON: But Mr. Thomas did not know that you had represented yourself to Wayman [sic] Bearden as Robert Johnson, did he?
CALLAHAN: I didn’t go out and say, Antonio, I'm representing myself as Robert Johnson. I told Antonio, I said, "It's in Robert’s name.” He knew I had a son that was Robert Johnson, And I said, "It’s in Robert’s name. I want to put the house in Robert's name.”
LAWSON: My question, sir, was: Mr. Thomas had no personal knowledge that you had represented yourself to Mr. Bearden as Robert Johnson, yes or no?
CALLAHAN: It’s kind of a hard question to answer yes or no. No, from — I’m assuming he didn’t know, no, but I don't know what he knew.
LAWSON: Well, you did not hear in Mr. Thomas' presence him introduce you to Mr. Bearden—
CALLAHAN: No, he never introduced me to Mr. Bearden as Robert Johnson.
. The main body of the obstruction of justice statute specifically targets conduct that interferes with the duties of a juror or court officer. The omnibus clause is essentially a catch-all provision which generally prohibits conduct that interferes with the due administration of justice.
See United States v. Brand,
. The Eleventh Circuit, in the en banc decision
Bonner v. City of Prichard,
. Various panels of the Eleventh Circuit have grafted the requirement that the defendant’s conduct have the natural and probable effect of obstructing justice onto different elements of the § 1503 offense.
Compare Brand,
. We reject
Williams,
however, to the extent that it deemphasizes the necessity of proving that the false testimony at issue had a natural and probable effect of impeding justice. Both
Griffin
and
Perkins
explicitly require that the false testimony could have the "effect of impeding justice” to support a § 1503 conviction, and we are bound by this precedent unless overruled by the Eleventh Circuit en banc or the United States Supreme Court.
Garay v. Carnival Cruise Line,
. The Eleventh Circuit in
Stein v. Reynolds Securities, Inc.,
. We find Thomas's testimony that he did not know Callahan by any name other than Rolland Callahan consistent with evidence that he occasionally referred to Callahan as "Cal” or "Rolland.” In the context of Thomas’s cross examination, we believe that no juror could reasonably treat Thomas’s references to Callahan by his first name or an abbreviated form of his last name as inconsistent with his testimony denying knowledge of Callahan by any name other than his full name.
