JUSTICE O'CONNOR delivered the opinion of the Court.
Petitioners William Conover and Anthony Tanner were convicted of conspiring to defraud the United States in violation of 18 U.S.C. § 371, and of committing mail fraud in violation of 18 U.S.C. § 1341. The United States Court of Appeals for the Eleventh Circuit affirmed the convictions. 772 F.2d 765 (1985). Petitioners argue that the District Court erred in refusing to admit juror testimony at a postverdict hearing on juror intoxication during the trial; and that the conspiracy count of the indictment failed to charge a crime against the United States. We affirm in part and remand.
I
Conover was the procurement manager at Seminole Electric Cooperative, Inc. (Seminole), a Florida corporation owned and operated by 11 rural electric distribution cooperatives. Seminole generates and transmits electrical energy to the cooperatives.
In 1979, Seminole borrowed over $1.1 billion from the Federal Financing Bank in order to construct a coal-fired power plant near Palatka, Florida. The loan was guaranteed by the Rural Electrification Administration (REA), a credit agency of the United States Department of Agriculture that assists rural electric organizations by providing loans, guaranteeing loans from other sources, and approving other security arrangements that allow the borrower to obtain financing. REA, A Brief History of the Rural Electrification and Telephone Programs (1985). The loan agreement between Seminole and the REA provided for federal supervision of the construction project. Under the contract, the REA could supervise the construction and equipment of the electric system, and inspect, examine, and test all work and materials relating to the construction project. App. 61-62. REA Bulletins and REA memoranda required Seminole to obtain REA approval before letting out certain contracts, and required certain bidding procedures to be used depending on the type of contract. Id. at 83, 105-108.
Construction of the Palatka plant began in September, 1979. To provide access to an area where a transmission line would be run, the plans called for the construction of a 51-mile patrol road. The road required materials that would support heavy trucks and resist flooding, and in March, 1981, Conover was informed that Seminole's current construction contractor was having difficulty obtaining enough suitable fill material for the road. The contractor indicated that it had not attempted to locate alternative fill materials, and that the contract price would have to be increased substantially in order for them to complete the road. The contract was subsequently terminated.
Following the March meeting at which Conover was informed of the difficulty with the patrol road, Conover called a friend, Anthony R. Tanner. Tanner owned a limerock mine, and the two discussed the possibility of using limerock and limerock overburden as an alternative fill material. At Conover's request, a Seminole engineer examined the material at Tanner's mine and determined that it would be suitable for the road. Seminole acquired limerock overburden from Tanner on an interim basis so that road construction could continue while bids were solicited for the remainder of the project. Seminole called for bids on a contract for provision of fill materials as well as a contract for building the road. Both contracts were to be paid with loan money guaranteed by the REA, and the contract for building the road required the REA's approval. The final specifications for the two contracts, which were prepared by Conover's procurement department, were favorable to Tanner's company in several respects. Tanner was awarded both contracts on May 14, 1981. The fill material contract paid approximately $1,041,800, and the road construction contract paid approximately $548,000. App. 10.
Several problems developed after Tanner began working on the road. There was a dispute as to whether Seminole or Tanner was required to maintain access roads leading to the patrol road. Conover advised Seminole that the contract was ambiguous, and that Seminole should pay for maintenance of the access road; ultimately Seminole did pay for the access road. Later, the REA complained that the bond provided by Tanner was not from a bonding company approved by the Treasury Department. In two letters to another bonding company in July, 1981, Conover represented the construction on the patrol road to be considerably more advanced than it was at that time. It was also discovered during the course of construction that limerock, which weakens when wet, could not be used in areas subject to flooding. For those areas, Tanner's company provided and spread sand, at a higher price than the sand provided and spread by the first contractor. The patrol road was completed in October, 1981.
At the time Conover called Tanner about using limerock as a fill material for Seminole's patrol road, Tanner and Conover were friends and had engaged in several business deals together. In January, 1981, Conover had obtained a contract from Tanner to perform landscaping work and install a sprinkler system at a condominium complex owned by Tanner. In early March, 1981, Tanner paid Conover $10,035, allegedly in partial payment for the landscaping work; eventually Conover received a total of $15,000 for the work. In May, 1981, Conover purchased a condominium from Tanner, and Tanner loaned Conover $6,000 so that Conover could close on the condominium.
In June, 1981, before the patrol road was finished, representatives of one of the members of the Seminole cooperative requested that Seminole end all business relations with Tanner. Seminole initiated an internal investigation, after which Seminole suspended and later demoted Conover for violation of the company's conflict of interest policies.
Federal authorities also investigated the situation, and in June, 1983, Conover and Tanner were indicted. A 6-week trial resulted in a hung jury, and a mistrial was declared. The two were subsequently reindicted; the first count alleged conspiracy to defraud the United States in violation of 18 U.S.C. § 371, and the second through fifth counts alleged separate instances of mail fraud in violation of 18 U.S.C. § 1341. Conover was convicted on all counts; Tanner was convicted on all but count three.
The day before petitioners were scheduled to be sentenced, Tanner filed a motion, in which Conover subsequently joined, seeking continuance of the sentencing date, permission to interview jurors, an evidentiary hearing, and a new trial. According to an affidavit accompanying the motion, Tanner's attorney had received an unsolicited telephone call from one of the trial jurors, Vera Asbul. App. 246. Juror Asbul informed Tanner's attorney that several of the jurors consumed alcohol during the lunch breaks at various times throughout the trial, causing them to sleep through the afternoons. Id. at 247. The District Court continued the sentencing date, ordered the parties to file memoranda, and heard argument on the motion to interview jurors. The District Court concluded that juror testimony on intoxication was inadmissible under Federal Rule of Evidence 606(b) to impeach the jury's verdict. The District Court invited petitioners to call any nonjuror witnesses, such as courtroom personnel, in support of the motion for new trial. Tanner's counsel took the stand and testified that he had observed one of the jurors "in a sort of giggly mood" at one point during the trial, but did not bring this to anyone's attention at the time. Id. at 170.
Earlier in the hearing, the judge referred to a conversation between defense counsel and the judge during the trial on the possibility that jurors were sometimes falling asleep. During that extended exchange, the judge twice advised counsel to immediately inform the court if they observed jurors being inattentive, and suggested measures the judge would take if he were so informed:
"MR. MILBRATH [defense counsel]: But, in any event, I've noticed over a period of several days that a couple of jurors in particular have been taking long naps during the trial. " "THE COURT: Is that right. Maybe I didn't notice because I was…"
MR. MILBRATH: I imagine the Prosecutors have noticed that a time or two.
THE COURT: What's your solution?
MR. MILBRATH: Well, I just think a respectful comment from the Court that, if any of them are getting drowsy, they just ask for a break or something might be helpful.
THE COURT: Well, here's what I have done in the past -and, you have to do it very diplomatically, of course: I once said, I remember, 'I think we'll just let everybody stand up and stretch, it's getting a little sleepy in here,' I said, but that doesn't sound good in the record. I'm going to -not going to take on that responsibility. If any of you think you see that happening, ask for a bench conference and come up and tell me about it, and I'll figure out what to do about it, and I won't mention who suggested it.
MR. MILBRATH: All right.
THE COURT: But I'm not going to sit here and watch. I'm -among other things, I'm not going to see -this is off the record. (Discussion had off the record.)… [T]his is a new thing to this jury, and I don't know how interesting it is to them or not; some of them look like they're pretty interested. * * * *" And, as I say, if you don't think they are, come up and let me know and I'll figure how -either have a recess or -which is more than likely what I would do.
Tr. 12-100-12-101.
As the judge observed during the hearing, despite the above admonitions, counsel did not bring the matter to the court again. App. 147.
The judge also observed that, in the past, courtroom employees had alerted him to problems with the jury. "Nothing was brought to my attention in this case about anyone appearing to be intoxicated," the judge stated, adding, "I saw nothing that suggested they were." Id. at 172.
Following the hearing, the District Court filed an order stating that,
[o]n the basis of the admissible evidence offered, I specifically find that the motions for leave to interview jurors or for an evidentiary hearing at which jurors would be witnesses is not required or appropriate.
The District Court also denied the motion for new trial. Id. at 181-182.
While the appeal of this case was pending before the Eleventh Circuit, petitioners filed another new trial motion based on additional evidence of jury misconduct. In another affidavit, Tanner's attorney stated that he received an unsolicited visit at his residence from a second juror, Daniel Hardy. Id. at 241. Despite the fact that the District Court had denied petitioners' motion for leave to interview jurors, two days after Hardy's visit, Tanner's attorney arranged for Hardy to be interviewed by two private investigators. Id. at 242. The interview was transcribed, sworn to by the juror, and attached to the new trial motion. In the interview, Hardy stated that he "felt like… the jury was on one big party." Id. at 209. Hardy indicated that seven of the jurors drank alcohol during the noon recess. Four jurors, including Hardy, consumed between them "a pitcher to three pitchers" of beer during various recesses. Id. at 212. Of the three other jurors who were alleged to have consumed alcohol, Hardy stated that, on several occasions, he observed two jurors having one or two mixed drinks during the lunch recess, and one other juror, who was also the foreperson, having a liter of wine on each of three occasions. Id. at 213-215. Juror Hardy also stated that he and three other jurors smoked marijuana quite regularly during the trial. Id. at 216-223. Moreover, Hardy stated that, during the trial, he observed one juror ingest cocaine five times and another juror ingest cocaine two or three times. Id. at 227. One juror sold a quarter pound of marijuana to another juror during the trial, and took marijuana, cocaine, and drug paraphernalia into the courthouse. Id. at 234-235. Hardy noted that some of the jurors were falling asleep during the trial, and that one of the jurors described himself to Hardy as "flying." Id. at 229. Hardy stated that, before he visited Tanner's attorney at his residence, no one had contacted him concerning the jury's conduct, and Hardy had not been offered anything in return for his statement. Id. at 232. Hardy said that he came forward "to clear my conscience," and
[b]ecause I felt… that the people on the jury didn't have no business being on the jury. I felt… that Mr. Tanner should have a better opportunity to get somebody that would review the facts right.
Id. at 231-232.
The District Court, stating that the motions "contain supplemental allegations which differ quantitatively, but not qualitatively, from those in the April motions," id. at 256, denied petitioners' motion for a new trial.
The Court of Appeals for the Eleventh Circuit affirmed. 772 F.2d 765 (1985). We granted certiorari, 479 U.S. 929 (1986), to consider whether the District Court was required to hold an evidentiary hearing, including juror testimony, on juror alcohol and drug use during the trial, and to consider whether petitioners' actions constituted a conspiracy to defraud the United States within the meaning of 18 U.S.C. § 371.
II
Petitioners argue that the District Court erred in not ordering an additional evidentiary hearing at which jurors would testify concerning drug and alcohol use during the trial. Petitioners assert that, contrary to the holdings of the District Court and the Court of Appeals, juror testimony on ingestion of drugs or alcohol during the trial is not barred by Federal Rule of Evidence 606(b). Moreover, petitioners argue that, whether or not authorized by Rule 606(b), an evidentiary hearing including juror testimony on drug and alcohol use is compelled by their Sixth Amendment right to trial by a competent jury.
By the beginning of this century, if not earlier, the near-universal and firmly established common law rule in the United States flatly prohibited the admission of juror testimony to impeach a jury verdict. See 8 J. Wigmore, Evidence § 2352, pp. 696-697 (J. McNaughton rev. ed.1961) (common law rule, originating from 1785 opinion of Lord Mansfield, "came to receive in the United States an adherence almost unquestioned").
Exceptions to the common law rule were recognized only in situations in which an "extraneous influence," Mattox v. United States, 146 U. S. 140, 146 U. S. 149 (1892), was alleged to have affected the jury. In Mattox, this Court held admissible the testimony of jurors describing how they heard and read prejudicial information not admitted into evidence. The Court allowed juror testimony on influence by outsiders in Parker v. Gladden, 385 U. S. 363, 385 U. S. 365 (1966) (bailiff's comments on defendant), and Remmer v. United States, 347 U. S. 227, 347 U. S. 228 -230 (1954) (bribe offered to juror). See also Smith v. Phillips, 455 U. S. 209 (1982) (juror in criminal trial had submitted an application for employment at the District Attorney's office). In situations that did not fall into this exception for external influence, however, the Court adhered to the common law rule against admitting juror testimony to impeach a verdict. McDonald v. Pless, 238 U. S. 264 (1915); Hyde v. United States, 225 U. S. 347, 225 U. S. 384 (1912).
Lower courts used this external/internal distinction to identify those instances in which juror testimony impeaching a verdict would be admissible. The distinction was not based on whether the juror was literally inside or outside the jury room when the alleged irregularity took place; rather, the distinction was based on the nature of the allegation. Clearly a rigid distinction based only on whether the event took place inside or outside the jury room would have been quite unhelpful. For example, under a distinction based on location, a juror could not testify concerning a newspaper read inside the jury room. Instead, of course, this has been considered an external influence about which juror testimony is admissible. See United States v. Thomas, 463 F.2d 1061 (CA7 1972). Similarly, under a rigid locational distinction, jurors could be regularly required to testify after the verdict as to whether they heard and comprehended the judge's instructions, since the charge to the jury takes place outside the jury room. Courts wisely have treated allegations of a juror's inability to hear or comprehend at trial as an internal matter. See Government of the Virgin Islands v. Nicholas, 759 F.2d 1073 (CA3 1985); Davis v. United States, 47 F.2d 1071 (CA5 1931) (rejecting juror testimony impeaching verdict, including testimony that jurors had not heard a particular instruction of the court).
Most significant for the present case, however, is the fact that lower federal courts treated allegations of the physical or mental incompetence of a juror as "internal," rather than "external," matters. In United States v. Dioguardi, 492 F.2d 70 (CA2 1974), the defendant Dioguardi received a letter from one of the jurors soon after the trial in which the juror explained that she had "eyes and ears that… see things before [they] happen," but that her eyes "are only partly open" because "a curse was put upon them some years ago." Id. at 75. Armed with this letter and the opinions of seven psychiatrists that the letter suggested that the juror was suffering from a psychological disorder, Dioguardi sought a new trial or, in the alternative, an evidentiary hearing on the juror's competence. The District Court denied the motion, and the Court of Appeals affirmed. The Court of Appeals noted "[t]he strong policy against any post-verdict inquiry into a juror's state of mind," id. at 79, and observed:
The quickness with which jury findings will be set aside when there is proof of tampering or external influence,… parallel the reluctance of courts to inquire into jury deliberations when a verdict is valid on its face…. Such exceptions support, rather than undermine, the rationale of the rule that possible internal abnormalities in a jury will not be inquired into except 'in the gravest and most important cases.'
Id. at 79, n. 12, quoting McDonald v. Pless, supra, at 238 U. S. 269 (emphasis in original). The Court of Appeals concluded that, when faced with allegations that a juror was mentally incompetent,
courts have refused to set aside a verdict, or even to make further inquiry, unless there be proof of an adjudication of insanity or mental incompetence closely in advance… of jury service,
or proof of "a closely contemporaneous and independent post-trial adjudication of incompetency." 492 F.2d at 80. See also Sullivan v. Fogg, 613 F.2d 465, 467 (CA2 1980) (allegation of juror insanity is internal consideration); United States v. Allen, 588 F.2d 1100, 1106, n. 12 (CA5 1979) (noting "specific reluctance to probe the minds of jurors once they have deliberated their verdict"); United States v. Pellegrini, 441 F.Supp. 1367 (ED Pa.1977), aff'd, 586 F.2d 836 (CA3), cert. denied, 439 U.S. 1050 (1978) (whether juror sufficiently understood English language was not a question of "extraneous influence"). This line of federal decisions was reviewed in Government of the Virgin Islands v. Nicholas, supra, in which the Court of Appeals concluded that a juror's allegation that a hearing impairment interfered with his understanding of the evidence at trial was not a matter of "external influence." Id. at 1079.
Substantial policy considerations support the common law rule against the admission of jury testimony to impeach a verdict. As early as 1915, this Court explained the necessity of shielding jury deliberations from public scrutiny:
[L]et it once be established that verdicts solemnly made and publicly returned into court can be attacked and set aside on the testimony of those who took part in their publication, and all verdicts could be, and many would be, followed by an inquiry in the hope of discovering something which might invalidate the finding. Jurors would be harassed and beset by the defeated party in an effort to secure from them evidence of facts which might establish misconduct sufficient to set aside a verdict. If evidence thus secured could be thus used, the result would be to make what was intended to be a private deliberation the constant subject of public investigation -to the destruction of all frankness and freedom of discussion and conference.
McDonald v. Pless, 238 U.S. at 238 U. S. 267 -268. See also Mattox v. United States, 146 U. S. 140 (1892).
The Court's holdings requiring an evidentiary hearing where extrinsic influence or relationships have tainted the deliberations do not detract from, but rather harmonize with, the weighty government interest in insulating the jury's deliberative process. See Smith v. Phillips, 455 U. S. 209 (1982) (juror in criminal trial had submitted an application for employment at the District Attorney's office); Remmer v. United States, 347 U. S. 227 (1954) (juror reported attempted bribe during trial and was subjected to investigation). The Court's statement in Remmer that "[t]he integrity of jury proceedings must not be jeopardized by unauthorized invasions," id. at 347 U. S. 229, could also be applied to the inquiry petitioners seek to make into the internal processes of the jury.
There is little doubt that postverdict investigation into juror misconduct would, in some instances, lead to the invalidation of verdicts reached after irresponsible or improper juror behavior. It is not at all clear, however, that the jury system could survive such efforts to perfect it. Allegations of juror misconduct, incompetency, or inattentiveness, raised for the first time days, weeks, or months after the verdict, seriously disrupt the finality of the process. See, e.g., Government of the Virgin Islands v. Nicholas, supra, at 1081 (one year and eight months after verdict rendered, juror alleged that hearing difficulties affected his understanding of the evidence). Moreover, full and frank discussion in the jury room, jurors' willingness to return an unpopular verdict, and the community's trust in a system that relies on the decisions of laypeople would all be undermined by a barrage of postverdict scrutiny of juror conduct. See Note, Public Disclosures of Jury Deliberations, 96 Harv.L.Rev. 886, 888-892 (1983).
Federal Rule of Evidence 606(b) is grounded in the common law rule against admission of jury testimony to impeach a verdict and the exception for juror testimony relating to extraneous influences. See Government of the Virgin Islands v. Gereau, 523 F.2d 140, 149, n. 22 (CA3 175); S.Rep. No. 93-1277, p. 13 (1974) (observing that Rule 606(b) "embodied long-accepted Federal law").
Rule 606(b) states:
Upon an inquiry into the validity of a verdict or indictment, a juror may not testify as to any matter or statement occurring during the course of the jury's deliberations or to the effect of anything upon his or any other juror's mind or emotions as influencing him to assent to or dissent from the verdict or indictment or concerning his mental processes in connection therewith, except that a juror may testify on the question whether extraneous prejudicial information was improperly brought to the jury's attention or whether any outside influence was improperly brought to bear upon any juror. Nor may his affidavit or evidence of any statement by him concerning a matter about which he would be precluded from testifying be received for these purposes.
Petitioners have presented no argument that Rule 606(b) is inapplicable to the juror affidavits and the further inquiry they sought in this case, and, in fact, there appears to be virtually no support for such a proposition. See 3 D. Louisell & C. Mueller, Federal Evidence § 287, pp. 121-125 (1979) (under Rule 606(b), "proof to the following effects is excludable… :… that one or more jurors was inattentive during trial or deliberations, sleeping or thinking about other matters"); cfr. Note, Impeachment of Verdicts by Jurors -Rule of Evidence 606(b), 4 Wm.Mitchell L.Rev. 417, 430-431, and n. 88 (1978) (observing that, under Rule 606(b), "juror testimony as to… juror intoxication probably will be inadmissible"; note author suggests that "[o]ne possibility is for the courts to determine that certain acts, such as a juror becoming intoxicated outside the jury room, simply are not within the rule," but cites no authority in support of the suggestion). Rather, petitioners argue that substance abuse constitutes an improper "outside influence" about which jurors may testify under Rule 606(b). In our view, the language of the Rule cannot easily be stretched to cover this circumstance. However severe their effect and improper their use, drugs or alcohol voluntarily ingested by a juror seems no more an "outside influence" than a virus, poorly prepared food, or a lack of sleep.
In any case, whatever ambiguity might linger in the language of Rule 606(b) as applied to juror intoxication is resolved by the legislative history of the Rule. In 1972, following criticism of a proposed rule that would have allowed considerably broader use of juror testimony to impeach verdicts, the Advisory Committee drafted the present version of Rule 606(b). Compare 51 F.R.D. 315, 387 (1971) with 56 F.R.D. 183, 265 (1972); see 117 Cong.Rec. 33642, 33645 (1971) (letter from Sen. McClellan to Advisory Committee criticizing earlier proposal); id. at 33655 (letter from Department of Justice to Advisory Committee criticizing earlier proposal and arguing that "[s]trong policy considerations continue to support the rule that jurors should not be permitted to testify about what occurred during the course of their deliberations"). This Court adopted the present version of Rule 606(b) and transmitted it to Congress.
The House Judiciary Committee described the effect of the version of Rule 606(b) transmitted by the Court as follows:
As proposed by the Court, Rule 606(b) limited testimony by a juror in the course of an inquiry into the validity of a verdict or indictment. He could testify as to the influence of extraneous prejudicial information brought to the jury's attention ( e.g., a radio newscast or a newspaper account) or an outside influence which improperly had been brought to bear upon a juror ( e.g., a threat to the safety of a member of his family), but he could not testify as to other irregularities which occurred in the jury room. Under this formulation, a quotient verdict could not be attacked through the testimony of juror, nor could a juror testify to the drunken condition of a fellow juror which so disabled him that he could not participate in the jury's deliberations.
H.R.Rep. No. 93-650, pp. 9-10 (1973) (emphasis supplied). The House Judiciary Committee, persuaded that the better practice was to allow juror testimony on any "objective juror misconduct," amended the Rule so as to comport with the more expansive versions proposed by the Advisory Committee in earlier drafts, * and the House passed this amended version.
The Senate Judiciary Committee did not voice any disagreement with the House's interpretation of the Rule proposed by the Court, or the version passed by the House. Indeed, the Senate Report described the House version as "considerably broader" than the version proposed by the Court, and noted that the House version
would permit the impeachment of verdicts by inquiry into, not the mental processes of the jurors, but what happened in terms of conduct in the jury room.
S.Rep. No. 93-1277, p. 13 (1974). With this understanding of the differences between the two versions of Rule 606(b) -an understanding identical to that of the House -the Senate decided to reject the broader House version and adopt the narrower version approved by the Court. The Senate Report explained:
[The House version's] extension of the ability to impeach a verdict is felt to be unwarranted and ill-advised. The rule passed by the House embodies a suggestion by the Advisory Committee of the Judicial Conference that is considerably broader than the final version adopted by the Supreme Court, which embodied long-accepted Federal law. Although forbidding the impeachment of verdicts by inquiry into the jurors' mental processes, it deletes from the Supreme Court version the proscription against testimony 'as to any matter or statement occurring during the course of the jury's deliberations.' This deletion would have the effect of opening verdicts up to challenge on the basis of what happened during the jury's internal deliberations, for example, where a juror alleged that the jury refused to follow the trial judge's instructions or that some of the jurors did not take part in deliberations. Permitting an individual to attack a jury verdict based upon the jury's internal deliberations has long been recognized as unwise by the Supreme Court. * * * *" As it stands then, the rule would permit the harassment of former jurors by losing parties as well as the possible exploitation of disgruntled or otherwise badly motivated ex-jurors. Public policy requires a finality to litigation. And common fairness requires that absolute privacy be preserved for jurors to engage in the full and free debate necessary to the attainment of just verdicts. Jurors will not be able to function effectively if their deliberations are to be scrutinized in post-trial litigation. In the interest of protecting the jury system and the citizens who make it work, rule 606 should not permit any inquiry into the internal deliberations of the jurors.
Id. at 13-14.
The Conference Committee Report reaffirms Congress' understanding of the differences between the House and Senate versions of Rule 606(b):
[T]he House bill allows a juror to testify about objective matters occurring during the jury's deliberation, such as the misconduct of another juror or the reaching of a quotient verdict. The Senate bill does not permit juror testimony about any matter or statement occurring during the course of the jury's deliberations.
H.R.Conf.Rep. No. 93-1597, p. 8 (1974). The Conference Committee adopted, and Congress enacted, the Senate version of Rule 606(b).
Thus, the legislative history demonstrates with uncommon clarity that Congress specifically understood, considered, and rejected a version of Rule 606(b) that would have allowed jurors to testify on juror conduct during deliberations, including juror intoxication. This legislative history provides strong support for the most reasonable reading of the language of Rule 606(b) -that juror intoxication is not an "outside influence" about which jurors may testify to impeach their verdict.
Finally, even if Rule 606(b) is interpreted to retain the common law exception allowing postverdict inquiry of juror incompetence in cases of "substantial if not wholly conclusive evidence of incompetency," Dioguardi, 492 F.2d at 80, the showing made by petitioners falls far short of this standard. The affidavits and testimony presented in support of the first new trial motion suggested, at worst, that several of the jurors fell asleep at times during the afternoons. The District Court Judge appropriately considered the fact that he had "an unobstructed vie