Petitioner's testimony before a grand jury in June, 1976,
implicated one Musgrave in various drug-related offenses, and an
indictment of Musgrave followed. On September 30, 1976, petitioner
recanted his testimony in an oral statement made under oath in the
office of Musgrave's attorney. Musgrave then moved to dismiss his
indictment, alleging that it was based on perjured testimony. At an
evidentiary hearing on this motion on October 21, 1976, petitioner
adopted his September 30 statement and testified that only a small
part of his grand jury testimony was true. As a result, the charges
against Musgrave were reduced. Petitioner was subsequently indicted
for violations of 18 U.S.C. § 1623 (1976 ed., Supp. 1), which
prohibits false declarations made under oath "in any proceeding
before or ancillary to any court or grand jury." The indictment
charged that petitioner's grand jury testimony was inconsistent
with statements made "on September 30, 1976, while under oath as a
witness in a proceeding ancillary to" the Musgrave prosecution. At
trial, the Government introduced, over petitioner's objection,
pertinent parts of his grand jury testimony, his testimony at the
evidentiary hearing, and his sworn statement to Musgrave's
attorney. Petitioner was convicted, and the Court of Appeals
affirmed. Although it agreed with petitioner that the September
interview in the attorney's office was not an ancillary proceeding
under § 1623, the court concluded that the October 21 hearing was
such a proceeding. While acknowledging that the indictment
specified the September 30 interview, rather than the October 21
hearing, as the ancillary proceeding, the court construed this
discrepancy as a nonprejudicial variance between the indictment and
the proof at trial.
Held:
1. Since the indictment and jury instructions specified the
September 30 interview as the ancillary proceeding, the Court of
Appeals erred in predicating its affirmance on petitioner's October
21 testimony. To uphold a conviction on a charge that was neither
alleged in an indictment nor presented to a jury offends the most
basic notions of due process. Although the jury might well have
reached the same verdict had the prosecution built its case on
petitioner's October 21 testimony adopting
Page 442 U. S. 101
his September 30 statement, rather than on the latter statement
itself, the offense was not so defined, and appellate courts are
not free to revise the basis on which a defendant is convicted
simply because the same result would likely obtain on retrial. Pp.
442 U. S.
105-107.
2. As both the language and legislative history of Title IV of
the 1970 Organized Crime Control Act make clear, an interview in a
private attorney's office at which a sworn statement is given does
not constitute a "proceeding ancillary to a court or grand jury"
within the meaning of § 1623. Moreover, to characterize such an
interview as an ancillary proceeding would contravene the
long-established practice of resolving doubt concerning the ambit
of criminal statutes in favor of lenity. Pp.
442 U.S. 107-113.
577 F.2d 119, reversed.
MARSHALL, J., delivered the opinion of the Court, in which all
other Members joined, except POWELL, J.J who took no part in the
consideration or decision of the case.
MR. JUSTICE MARSHALL delivered the opinion of the Court.
Title IV of the Organized Crime Control Act of 1970, 18 U.S.C. §
1623 (1976 ed., Supp. 1), prohibits false declarations made under
oath "in any proceeding before or ancillary to any court or grand
jury of the United States." [
Footnote 1] This case turns
Page 442 U. S. 102
on the scope of the term ancillary proceeding in § 1623, a
phrase not defined in that provision or elsewhere in the Criminal
Code. More specifically, we must determine whether an interview in
a private attorney's office at which a sworn statement is given
constitutes a proceeding ancillary to a court or grand jury within
the meaning of the statute.
I
On June 16, 1976, petitioner Robert Dunn testified before a
federal grand jury under a grant of immunity pursuant to 18 U.S.C.
§ 6002. [
Footnote 2] The grand
jury was investigating illicit
Page 442 U. S. 103
drug activity at the Colorado State Penitentiary where
petitioner had been incarcerated. Dunn's testimony implicated a
fellow inmate, Phillip Musgrave, in various drug-related offenses.
Following petitioner's appearance, the grand jury indicted Musgrave
for conspiracy to manufacture and distribute methamphetamine.
Several months later, on September 30, 1976, Dunn arrived
without counsel in the office of Musgrave's attorney, Michael
Canges. In the presence of Canges and a notary public, petitioner
made an oral statement under oath in which he recanted his grand
jury testimony implicating Musgrave. Canges subsequently moved to
dismiss the indictment against Musgrave, alleging that it was based
on perjured testimony. In support of this motion, the attorney
submitted a transcript of Dunn's September 30 statement.
The District Court held an evidentiary hearing on Musgrave's
motion to dismiss on October 21, 1976. At that hearing, petitioner,
who was then represented by counsel, adopted the statement he had
given in Canges' office and testified that only a small part of
what he had told the grand jury was in fact true. App. 46. As a
result of petitioner's testimony, the Government reduced the
charges against Musgrave to misdemeanor possession of
methamphetamine.
See 21 U.S.C.§ 844.
Petitioner was subsequently indicted on five counts of making
false declarations in violation of 18 U.S.C. § 1623 (1976 ed.,
Supp. 1). The indictment charged that Dunn's testimony before the
grand jury was inconsistent with statements made
"on September 30, 1976, while under oath as a witness
Page 442 U. S. 104
in a proceeding ancillary to United States v. Musgrave, . . . to
the degree that one of said declarations was false. . . ."
App. 5-6. [
Footnote 3] In
response to petitioner's motion for a bill of particulars, the
Government indicated that it would rely on the "inconsistent
declarations" method of proof authorized by § 1623(c). Under that
subsection, the Government must establish the materiality and
inconsistency of declarations made in proceedings before or
ancillary to a court or grand jury, but need not prove which of the
declarations is false.
See n 1,
supra.
At trial, the Government introduced over objection pertinent
parts of Dunn's grand jury testimony, his testimony at the October
21 evidentiary hearing, and his sworn statement to Musgrave's
attorney. After the Government rested its case, petitioner renewed
his objections in a motion for acquittal. He contended that the
September 30 statement was not made in a proceeding ancillary to a
federal court or grand jury, as required by § 1623(c). In addition,
Dunn argued that use of his grand jury testimony to prove an
inconsistent declaration would contravene the Government's promise
of immunity, in violation of 18 U.S.C. § 6002 and the Fifth
Amendment. The court denied the motion and submitted the case to
the jury. Petitioner was convicted on three of the five counts of
the indictment and sentenced to concurrent 5-year terms on each
count.
The Court of Appeals for the Tenth Circuit affirmed. 577 F.2d
119 (1978). Although it agreed with petitioner that the interview
in Canges' office was not an ancillary proceeding under § 1623, the
court determined that the October 21 hearing at which petitioner
adopted his September statement was a proceeding ancillary to a
grand jury investigation. 577 F.2d at 123. Acknowledging that the
indictment specified the September 30 interview, rather than the
October 21 hearing
Page 442 U. S. 105
as the ancillary proceeding, the Court of Appeals construed this
discrepancy as a nonprejudicial variance between the indictment and
proof at trial.
Id.at 123-124. The court also upheld the
use of petitioner's immunized grand jury testimony to prove a §
1623 violation. In so ruling, the court stated that immunized
testimony generally may not be used to establish an inconsistent
declaration without a prior independent showing that the testimony
is false. But, in the court's view, petitioner's unequivocal
concession at the October hearing that he had testified falsely
before the grand jury justified the Government's reliance on that
testimony. 577 F.2d at 125-126.
We granted certiorari, 439 U.S. 1045 (1978). Because we disagree
with the Court of Appeals' ultimate disposition of the ancillary
proceeding issue, we reverse without reaching the question whether
petitioner's immunized testimony was admissible to prove a
violation of § 1623.
II
A variance arises when the evidence adduced at trial establishes
facts different from those alleged in an indictment.
Berger v.
United States, 295 U. S. 78
(1935). In the instant case, since the indictment specified the
September 30 interview, rather than the October 21 hearing, as the
ancillary proceeding, the Court of Appeals identified a variance
between the pleadings and the Government's proof at trial. However,
reasoning that petitioner's October 21 testimony was "inextricably
related" to his September 30 declaration, the court concluded that
petitioner could have anticipated that the prosecution would
introduce the October testimony. 577 F.2d at 123. The court
therefore determined that the variance was not fatal to the
Government's case.
See Kotteakos v. United States,
328 U. S. 750,
328 U. S. 757
(1946).
In our view, it is unnecessary to inquire, as did the Court of
Appeals, whether petitioner was prejudiced by a variance
Page 442 U. S. 106
between what was alleged in the indictment and what was proved
at trial. For we discern no such variance. The indictment charged
inconsistency between petitioner's statements in the September 30
interview and his grand jury testimony. That was also the theory on
which the case was tried and submitted to the jury. [
Footnote 4] Indeed, the October 21 testimony
was introduced by the Government only in rebuttal to dispel any
inference that petitioner's grand jury testimony was true.
See Tr. 82-83. But while there was no variance between the
indictment and proof at trial, there was a discrepancy between the
basis on which the jury rendered its verdict and that on which the
Court of Appeals sustained petitioner's conviction. Whereas the
jury was instructed to rest its decision on Dunn's September
statement, the Tenth Circuit predicated its affirmance on
petitioner's October testimony. The Government concedes that this
ruling was erroneous. Brief for United States 15, 35; Tr. of Oral
Arg. 25. We agree.
To uphold a conviction on a charge that was neither alleged in
an indictment nor presented to a jury at trial offends the most
basic notions of due process. Few constitutional principles are
more firmly established than a defendant's right to be heard on the
specific charges of which he is accused.
See Eaton v.
Tulsa, 415 U. S. 697,
415 U. S.
698-699 (1974) (per curiam);
Garner v.
Louisiana, 368 U. S. 157,
368 U. S.
163-164 (1961);
Cole v. Arkansas, 333 U.
S. 196,
333 U. S. 201
(1948);
De Jonge
v.
Page 442 U. S. 107
Oregon, 299 U. S. 353,
299 U. S. 362
(1937). There is, to be sure, no glaring distinction between the
Government's theory at trial and the Tenth Circuit's analysis on
appeal. The jury might well have reached the same verdict had the
prosecution built its case on petitioner's October 21 testimony
adopting his September 30 statement, rather than on the September
statement itself. But the offense was not so defined, and appellate
courts are not free to revise the basis on which a defendant is
convicted simply because the same result would likely obtain on
retrial. As we recognized in
Cole v. Arkansas, supra at
333 U. S.
201,
"[i]t is as much a violation of due process to send an accused
to prison following conviction of a charge on which he was never
tried as it would be to convict him upon a charge that was never
made."
Thus, unless the September 30 interview constituted an ancillary
proceeding, petitioner's conviction cannot stand.
III
Congress enacted § 1623 as part of the 1970 Organized Crime
Control Act, Pub.L. 91-452, 84 Stat. 922, to facilitate perjury
prosecutions and thereby enhance the reliability of testimony
before federal courts and grand juries. S.Rep. No. 91-617, pp.
58-59 (1969). Invoking this broad congressional purpose, the
Government argues for an expansive construction of the term
ancillary proceeding. Under the Government's analysis, false
swearing in an affidavit poses the same threat to the factfinding
process as false testimony in open court. Brief for United States
21. Thus, the Government contends that any statements made under
oath for submission to a court, whether given in an attorney's
office or in a local bar and grill, fall within the ambit of §
1623.
See Tr. of Oral Arg. 31. In our judgment, the term
"proceeding," which carries a somewhat more formal connotation,
suggests that Congress had a narrower end in view when enacting §
1623. And the legislative history of the Organized Crime Control
Act confirms that conclusion.
Page 442 U. S. 108
Section 1623 was a response to perceived evidentiary problems in
demonstrating perjury under the existing federal statute, 18 U.S.C.
§ 1621. [
Footnote 5] As
Congress noted, the strict common law requirements for establishing
falsity which had been engrafted onto the federal perjury statute
often made prosecution for false statements exceptionally
difficult. [
Footnote 6] By
relieving the Government of the burden of proving which of two or
more inconsistent declarations was false,
see § 1623(c),
Congress sought to afford "greater assurance that testimony
obtained in grand jury and court proceedings will aid the cause of
truth." S.Rep. No. 91-617, p. 59 (1969). But nothing in the
language or legislative history of the statute suggests that
Congress contemplated a relaxation of the Government's burden of
proof with respect to all inconsistent statements given under oath.
Had Congress intended such a result, it presumably would have
drafted § 1623 to encompass all sworn declarations irrespective of
whether they were made in proceedings
Page 442 U. S. 109
before or ancillary to a court or grand jury. Particularly since
Congress was aware that statements under oath were embraced by the
federal perjury statute without regard to where they were given,
[
Footnote 7] the choice of less
comprehensive language in § 1623 does not appear inadvertent.
That Congress intended § 1623 to sweep less broadly than the
perjury statute is also apparent from the origin of the term
ancillary proceeding. As initially introduced in Congress, the
Organized Crime Control Act contained a version of § 1623 which
encompassed only inconsistent statements made in any "trial,
hearing, or proceeding before any court or grand jury." [
Footnote 8] When asked to comment on
the proposed statute, the Department of Justice noted that the
scope of the inconsistent declarations provision was "not as
inclusive" as the perjury statute.
See Hearings on S. 30
et al. before the Subcommittee on Criminal Laws and
Procedures of the Senate Committee on the Judiciary, 91st Cong.,
1st Sess., 372 (1969) (hereinafter S. 30 Hearings). Significantly,
the Justice Department did not suggest that the provision be made
coextensive with the perjury statute. However, in subsequent Senate
Subcommittee hearings, Assistant Attorney General Wilson indicated,
without elaboration, that the Department advocated "including
[under § 1623] other testimony, preliminary testimony and other
statements, in the perjury field."
Id. at 389.
In response to that general suggestion, Senator McClellan,
Page 442 U. S. 110
on behalf of the Subcommittee, sent a letter to the Assistant
Attorney General clarifying its purpose:
"You also read Title IV not to cover 'pre-trial depositions,
affidavits and certifications.' This was not our intent in drafting
the bill. We had hoped that it would be applicable, for example, to
situations such as [the] kind of pre-trial depositions that the
enforcement of S. 1861 would present. If we included in the statute
the phrase 'proceedings before or ancillary to any court or grand
jury,' do you feel that this intent would be adequately
expressed?"
Id. at 409. [
Footnote
9] The Government attaches great significance to the
qualification, "for example," in Senator McClellan's letter.
Because pretrial depositions were mentioned as illustrative, the
Government interprets the term ancillary proceeding to subsume
affidavits and certifications as well. But that is not the
inference the Department of Justice originally drew from the
Senator's letter. Responding to the proposed modification of §
1623, Assistant Attorney General Wilson did not advert to
affidavits or certifications, but stated only that
"[i]nclusion of the phrase 'proceedings before or ancillary to
any court or grand jury' in the false statement provision would, in
our opinion, adequately bring within the coverage of the provision
pre-trial depositions such as that contained in S. 1861."
S. 30 Hearings 411. In our view, the Justice Department's
contemporaneous, rather than its current, interpretation offers the
more plausible reading of the Subcommittee's intent. Its attention
having been drawn to the issue, had the Subcommittee wished to
bring all affidavits and certifications within the statutory
Page 442 U. S. 111
prohibition, Senator McClellan presumably would have so
stated.
Finally, to construe the term ancillary proceeding in § 1623 as
excluding statements given in less formal contexts than depositions
would comport with Congress' use of the phrase in a related
provision of the Organized Crime Control Act. Title II of the Act,
18 U.S.C. § 6002, authorizes extension of immunity to any witness
who claims his privilege against self-incrimination "in a
proceeding . . . ancillary to" a court, grand jury, or agency of
the United States, or before Congress or one of its committees.
See n 2,
supra. Although neither the House nor Senate Report
defines the precise scope of § 6002, they both specify pretrial
depositions as the sole example of what would constitute an
ancillary proceeding under that provision. H.R.Rep. No. 91-1549, p.
42 (1970); S.Rep. No. 91-617, p. 145 (1969).
Thus, both the language and history of the Act support the Court
of Appeals' conclusion that petitioner's September 30 interview
"lack[ed] the degree of formality" required by § 1623. 577 F.2d at
123. [
Footnote 10] For the
Government does not, and could not seriously, maintain that the
interview in Canges' office constituted a deposition.
See
Tr. of Oral Arg.
Page 442 U. S. 112
25. Musgrave's counsel made no attempt to comply with the
procedural safeguards for depositions set forth in Fed.Rule
Crim.Proc. 15 and 18 U.S.C. § 3503. A court order authorizing the
deposition was never obtained. [
Footnote 11] Nor did petitioner receive formal notice of
the proceeding or of his right to have counsel present. [
Footnote 12] Indeed, petitioner did
not even certify the transcript of the interview as accurate.
[
Footnote 13]
To characterize such an interview as an ancillary proceeding
would not only take liberties with the language and legislative
history of § 1623, it would also contravene this Court's
long-established practice of resolving questions concerning the
ambit of a criminal statute in favor of lenity.
Huddleston v.
United States, 415 U. S. 814,
415 U. S. 831
(1974);
Rewis v. United States, 401 U.
S. 808,
401 U. S. 812
(1971);
Bell v. United States, 349 U. S.
81,
349 U. S. 83
(1955). This practice reflects not merely a convenient maxim of
statutory construction. Rather, it is rooted in fundamental
principles of due process which mandate that no individual be
forced to speculate, at peril of indictment, whether his conduct is
prohibited.
Grayned v. City of Rockford, 408 U.
S. 104,
408 U. S. 108
(1972);
United States v. Harriss, 347 U.
S. 612,
347 U. S. 617
(1954);
Lanzetta v. New Jersey, 306 U.
S. 451,
306 U. S. 453
(1939);
McBoyle v. United States, 283 U. S.
25,
283 U. S. 27
(1931). Thus, to ensure that a legislature speaks with special
clarity when marking the boundaries of criminal conduct, courts
must decline to impose punishment for actions
Page 442 U. S. 113
that are not "
plainly and unmistakably'" proscribed.
United States v. Gradwell, 243 U.
S. 476, 243 U. S. 485
(1917).
We cannot conclude here that Congress in fact intended or
clearly expressed an intent that § 1623 should encompass statements
made in contexts less formal than a deposition. Accordingly, we
hold that petitioner's September 30 declarations were not given in
a proceeding ancillary to a court or grand jury within the meaning
of the statute. [
Footnote
14]
The judgment of the Court of Appeals is
Reversed.
MR. JUSTICE POWELL took no part in the consideration or decision
of this case.
[
Footnote 1]
In pertinent part, 18 U.S.C. § 1623 (1976 ed., Supp. 1)
provides:
"(a) Whoever under oath (or in any declaration, certificate,
verification, or statement under penalty of perjury as permitted
under section 1746 of title 28, United States Code) in any
proceeding before or ancillary to any court or grand jury of the
United States knowingly makes any false material declaration or
makes or uses any other information, including any book, paper,
document, record, recording, or other material, knowing the same to
contain any false material declaration, shall be fined not more
than $10,000 or imprisoned not more than five years, or both."
"
* * * *"
"(c) An indictment or information for violation of this section
alleging that, in any proceedings before or ancillary to any court
or grand jury of the United States, the defendant under oath has
knowingly made two or more declarations, which are inconsistent to
the degree that one of them is necessarily false, need not specify
which declaration is false if -- "
"(1) each declaration was material to the point in question,
and"
"(2) each declaration was made within the period of the statute
of limitations for the offense charged under this section."
"In any prosecution under this section, the falsity of a
declaration set forth in the indictment or information shall be
established sufficient for conviction by proof that the defendant
while under oath made irreconcilably contradictory declarations
material to the point in question in any proceeding before or
ancillary to any court or grand jury. It shall be a defense to an
indictment or information made pursuant to the first sentence of
this subsection that the defendant at the time he made each
declaration believed the declaration was true."
[
Footnote 2]
Under 18 U.S.C. § 6002:
"Whenever a witness refuses, on the basis of his privilege
against self-incrimination, to testify or provide other information
in a proceeding before or ancillary to -- "
"(1) a court or grand jury of the United States,"
"(2) an agency of the United States, or"
"(3) either House of Congress, a joint committee of the two
Houses, or a committee or a subcommittee of either House,"
and the person presiding over the proceeding communicates to the
witness an order issued under this part, the witness may not refuse
to comply with the order on the basis of his privilege against
self-incrimination; but no testimony or other information compelled
under the order (or any information directly or indirectly derived
from such testimony or other information) may be used against the
witness in any criminal case, except a prosecution for perjury,
giving a false statement, or otherwise failing to comply with the
order.
[
Footnote 3]
Each count alleged that a specific representation in the
September 30 statement was inconsistent with a corresponding
portion of petitioner's grand jury testimony.
See App.
3-11.
[
Footnote 4]
The District Court instructed the jury that in order to convict
petitioner, it had to determine beyond a reasonable doubt that
petitioner "while under oath, made irreconcilably contradictory
declarations . . . in any proceeding before or ancillary to a court
or grand jury." Tr. 179. The court did not define the term
ancillary proceeding, but admonished the jury to render its verdict
on the charges alleged in the indictment, which specified June 16,
1976, and September 30, 1976, as the proceedings at which
inconsistent statements were given.
Id. at 175-176; App.
3-11. Moreover, both the Assistant United States Attorney and
defense counsel focused their summations on the September 30
statement.
See Tr. 151, 167.
[
Footnote 5]
Title 18 U.S.C. § 1621 provides:
"Whoever --"
"(1) having taken an oath before a competent tribunal, officer,
or person, in any case in which a law of the United States
authorizes an oath to be administered, that he will testify,
declare, depose, or certify truly, or that any written testimony,
declaration, deposition, or certificate by him subscribed, is true,
willfully and contrary to such oath states or subscribes any
material matter which he does not believe to be true; or"
"(2) in any declaration, certificate, verification, or statement
under penalty of perjury as permitted under section 1746 of title
28, United States Code, willfully subscribes as true any material
matter which he does not believe to be true;"
"is guilty of perjury and shall, except as otherwise expressly
provided by law, be fined not more than $2,000 or imprisoned not
more than five years, or both. This section is applicable whether
the statement or subscription is made within or without the United
States."
[
Footnote 6]
In particular, Congress focused on the two-witness rule, under
which "the uncorroborated oath of one witness is not enough to
establish the falsity of the testimony of the accused."
Hammer
v. United States, 271 U. S. 620,
271 U. S. 626
(1926);
accord, Weiler v. United States, 323 U.
S. 606,
323 U. S.
608-610 (1945).
See S.Rep. No. 91-617, pp.
57-59 (1969).
[
Footnote 7]
See id. at 110-111; n. 5,
supra.
[
Footnote 8]
In its entirety, the original version of § 1623(a) provided:
"Whoever, having taken an oath in any trial, hearing, or
proceeding before any court or grand jury, in which a law of the
United States authorizes the oath, knowingly falsifies fact, or
makes any false, fictitious, or fraudulent statement or
representation, or makes or uses any false writing or document
knowing the same to contain any false, fictitious, or fraudulent
statement or entry, shall be fined not more than $10,000 or
imprisoned not more than five years, or both."
S. 30, 91st Cong., 1st Sess., § 401 (1969).
[
Footnote 9]
The provision of S. 1861 to which the Senator adverted involved
use of depositions in racketeering investigations. It is currently
codified as 18 U.S.C. § 1968.
[
Footnote 10]
In arguing that petitioner's September 30 interview was an
ancillary proceeding, the Government relies on
United States v.
Stassi, 583 F.2d 122 (CA3 1978), and
United States v.
Krogh, 366 F.
Supp. 1255, 1256 (DC 1973). The defendant in
Stassi
was convicted under § 1623 of making statements in a Fed.Rule
Crim.Proc. 11 guilty plea hearing that were irreconcilable with his
declarations in an affidavit supporting a motion to vacate
sentence. Without adverting to any legislative history, the Court
of Appeals affirmed on the theory that a false affidavit "offends
the administration of criminal justice as much as [other] false
material declaration[s]." 583 F.2d at 127. Insofar as
Stassi's analysis is inconsistent with our decision here,
we decline to follow it. And
Krogh affords no support for
the Government's position in this case, since the court there held
only that a sworn deposition taken in the office of an Assistant
United States Attorney General was a proceeding ancillary to a
grand jury investigation.
[
Footnote 11]
Title 18 U.S.C. § 3503(a) provides:
"Whenever due to exceptional circumstances it is in the interest
of justice that the testimony of a prospective witness of a party
be taken and preserved, the court at any time after the filing of
an indictment or information may upon motion of such party and
notice to the parties order that the testimony of such witness be
taken by deposition. . . ."
The language of Fed.Rule Crim.Proc. 15(a) is substantially the
same.
[
Footnote 12]
See 18 U.S.C. §§ 3503(b),(c); Fed.Rule Crim.Proc.
15(b).
[
Footnote 13]
See App. 46; 18 U.S.C. § 3503(d); Fed.Rule Crim Proc.
15(d).
[
Footnote 14]
The Government points out that, if this Court reverses
petitioner's conviction on the ground that the September 30
statement was not given in an ancillary proceeding, petitioner will
be subject to reindictment for making declarations in the October
21 hearing inconsistent with his testimony in the June 16 grand
jury proceeding. Thus, the Government urges us to reach the second
question decided by the Court of Appeals concerning the use of
petitioner's immunized testimony to prove a violation of § 1623.
Brief for United States 36-37. We decline to render an advisory
opinion based on the Government's suppositions not only that
petitioner will be reindicted but also that he will be convicted
after a trial at which the immunized testimony is introduced.