185 F.3d 1064 (9th Cir. 1999)
UNITED STATES OF AMERICA, Plaintiff-Appellant,v.JOHN A. HICKEY; MAMIE TANG, Defendants-Appellees.
No. 98-10305
UNITED STATES COURT OF APPEALS FOR THE NINTH CIRCUIT
Argued and Submitted June 15, 1999Decided August 9, 1999

David W. Shapiro, Assistant United States Attorney, San Francisco, California, for the plaintiff-appellant.
David J. Cohen, Law Office of David J. Cohen, San Francisco, California, and William Weiner, San Francisco, California, for the defendants-appellees.
Appeal from the United States District Court for the Northern District of California  Maxine M. Chesney, District Judge, Presiding. D.C. No. CR-97-00128-MMC.
Before: Mary M. Schroeder, Betty B. Fletcher and Robert Boochever, Circuit Judges.
OPINION
SCHROEDER, Circuit Judge:


1
The principal issue is whether we have jurisdiction over an  interlocutory criminal appeal by the United States. The government seeks to appeal the district court's order refusing to  unseal the criminal defendants' financial affidavits, which the  defendants were required to file in support of their request for  court-appointed counsel. We hold that we lack jurisdiction  because the appeal does not fall within the statutory rule that  only final judgments are appealable, 28 U.S.C. S 1291, within  the limited exceptions for interlocutory criminal appeals by  the government, 18 U.S.C. S 3731, or within the collateral  order exception to the finality rule, Cohen v. Beneficial Indus.  Loan Corp., 337 U.S. 541, 546-47 (1949). We dismiss the  appeal and deny the government's alternative application for  mandamus relief.


2
In July of 1997, a grand jury indicted the criminal defendants and appellees, John Hickey and Mamie Tang, for securities, mail, and wire fraud. The indictment alleged, among  other things, that the defendants misappropriated millions of  dollars of investor funds, which the defendants obtained by  selling limited partnership interests. During the course of the  investigation leading to the indictment, the defendants had  applied for, and received, court-appointed counsel. See United States v. Hickey, 997 F. Supp. 1206, 1207 (N.D. Cal. 1998).  In addition to appointing counsel, the court had also ordered  the defendants' financial affidavits sealed. Id.


3
After the indictment, the government moved to unseal the  financial affidavits and to show cause why the defendants  should not be compelled to retain private counsel. Id. The  magistrate judge to whom the motions had been referred  denied the motion to unseal the financial affidavits and  granted the government's motion for an order to show cause.  Id. at 1208-09. The magistrate judge subsequently held an in  camera hearing to evaluate whether the defendants met the  financial requirements for court-appointed counsel and ruled  that both defendants qualified for appointed counsel. In denying the motion to unseal, the magistrate judge found that the  financial information contained within the defendants' affidavits directly related to the financial fraud charges against  them. Id. at 1208-09. This congruence between the character  of the information contained in the affidavits and the charges  levied against the defendants led the magistrate judge to conclude that the "[d]efendants are faced with substantial and real  hazards of incrimination should the Court unseal the financial  affidavits." Id. The district court upheld the magistrate judge's  ruling.


4
In its attempt to appeal to this court, the government  contends that it seeks review of the sealing order in part  because it wishes to vindicate the public's right of access to  documents filed with the court, see Seattle Times Co. v.  United States Dist. Court (W.D. Wash.), 845 F.2d 1513, 1515  (9th Cir. 1988). The government, however, lacks third-party  standing to assert this right on behalf of the public in this case. The government is the prosecutor, not a third party  whose sole interest in the litigation is access to documents.  Moreover, the government has not shown that members of the  public face any impediments in asserting their right of access  to these documents. See Singleton v. Wulff, 428 U.S. 106,  115-16 (1976); (four Justices concurring); Powers v. Ohio,  499 U.S. 400, 414-15 (1991) (discussing obstacles faced by  discriminated-against jury venirepersons in protecting their  own rights); United States v. De Gross, 960 F.2d 1433, 1437  (9th Cir. 1992) (en banc) (same); see also United States v.  Carrigan, 804 F.2d 599, 601 n.1 (10th Cir. 1986) (government cannot claim third party standing unless the third party  faces an impediment to asserting her own rights).


5
The government does put forward other interests that it has  standing to assert. It acknowledges that it wishes to unseal the  affidavits at least in part to gain discovery of material that  may be used in its case in chief, and for impeachment purposes should the defendants testify. It further contends that it  wishes to examine the affidavits to investigate the possibility  of independently prosecuting the defendants for perjury.


6
Ordinarily, we may review a district court order only  upon the final decision in the underlying litigation. See 28  U.S.C. S 1291; Coopers & Lybrand v. Livesay, 437 U.S. 463,  467 (1978); United States v. Dior, 671 F.2d 351, 354 (9th Cir.  1982). The government, of course, cannot appeal from a judgment of acquittal because a defendant may not twice be put  in jeopardy. See U.S. Const. amend. V; Monge v. California,  524 U.S. 721, 118 S. Ct. 2246, 2250 (1998). A statute provides the government an appeal as of right from certain interlocutory orders including, for example, an order granting a motion to suppress. See 18 U.S.C. S 3731. Section 3731  clearly does not apply here, and the government does not contend that it does. See Dior, 671 F.2d at 356 (discussing the  "limited circumstances" in which S 3731 applies).


7
The government asserts that this court has jurisdiction  over this appeal under the collateral order doctrine, a narrow  non-statutory exception to S 1291's final judgment rule. See  Midland Asphalt Corp. v. United States, 489 U.S. 794, 798-99  (1989) (citing Cohen, 337 U.S. at 546). To fall within the  parameters of the exception, an order must "(1) conclusively  determine the disputed question, (2) resolve an important  issue completely separate from the merits of the action, and  (3) [be] effectively unreviewable on appeal from a final  judgment." See United States v. Hitchcock, 992 F.2d 236, 238  (9th Cir. 1993) (per curiam). We apply this exception strictly  in criminal cases because of S 1291's strong policy against  piecemeal litigation and the disfavor for government appeals  in the criminal context. See Midland Asphalt Corp., 489 U.S.  at 799; Carroll v. United States, 354 U.S. 394, 400-05 (1957);  Hitchcock, 992 F.2d at 238; Dior, 671 F.2d at 354-56. The  government thus frequently cannot obtain review of alleged  district court errors in a criminal case, a consequence that  inevitably flows from the rationales underlying the final judgment rule and the limited nature of the collateral order exception. Carroll, 354 U.S. at 406.


8
The district court's order in this case does not qualify  as an appealable collateral order. First, the order does not conclusively determine that the affidavits must remain sealed forever, permanently foreclosing a government investigation into  possible perjury. Once the defendants have been tried on the indicted offenses, or even after the defendants have concluded  their testimony in this case, the Fifth Amendment concern  will be greatly diminished. At these junctures, the government's chance of prevailing in a renewed motion to unseal the  affidavits will be considerably stronger.


9
The order does resolve conclusively the question of  whether the government can use the affidavits to provide possible evidence in this proceeding, as opposed to future unrelated proceedings. This issue, however, and the collateral  question of possible self-incrimination barred by the Fifth  Amendment, implicate the merits of the current prosecution.  Thus, this appeal also fails the second requirement for interlocutory review, because the underlying sealing order is not  completely separate from the merits of the case. See  Cunningham v. Hamilton County, _______ U.S._______, 119 S. Ct. 1915,  1920 (1999) (appellate review of a sanctions order would not  be completely separate from merits of underlying case);  Coopers & Lybrand, 437 U.S. at 469 (class action determinations intertwined with factual and legal issues of underlying  action). An order that maintains documents under seal is tantamount to a garden variety evidentiary ruling that is classically interlocutory and not appealable. See Carroll, 354 U.S.  at 404-05; Church of Scientology v. United States, 591 F.2d  533, 536 (9th Cir. 1979).


10
Finally, the order does not fulfill the third requirement  of the collateral order doctrine. This third requirement is only  satisfied where "the order at issue involves an asserted right  the legal and practical value of which would be destroyed if  it were not vindicated before trial." Midland Asphalt, 489  U.S. at 799 (internal quotations and citation omitted). The magistrate judge sealed the financial affidavits because the  defendants' financial condition directly concerned the present  charges against them, thus implicating the Fifth Amendment  should the affidavits be unsealed. Once the defendants are  tried on these charges, the risk of self-incrimination will have  dissipated because the government may not retry the defendants on the same charges. See Abney v. United States, 431  U.S. 651, 660-61 (1977) (discussing the Double Jeopardy  Clause). Thus, the government's asserted right to investigate  possible perjury in the affidavit will not be irretrievably lost  if not asserted before trial. In sum, the collateral order doctrine does not permit us to review the sealing order.


11
In the alternative, the government asks us to consider its  appeal as an application for a writ of mandamus. In order to  succeed on this application, the government must satisfy the  Bauman factors. These are:


12
(1) The party seeking the writ has no other adequate means, such as a direct appeal, to attain  the relief that he or she desires.


13
(2) The petitioner will be damaged or prejudiced in  a way not correctable on appeal.


14
(3) The district court's order is clearly erroneous as  a matter of law.


15
(4) The district court's order is an oft-repeated  error, or manifests a persistent disregard of the  federal rules.


16
(5) The district court's order raises new and important problems, or issues of law of first impression.


17
Allen v. Old Nat'l Bank of Wash., 896 F.2d 416, 419-20 (9th  Cir. 1990) (citing Bauman v. United States Dist. Court, 557  F.2d 650, 654-55 (9th Cir. 1977)). Writs of mandamus ought  not be used to rectify "erroneous interlocutory orders that are  within a district court's prescribed jurisdiction. " See Dior, 671  F.2d at 357. Nor should writs be issued to thwart the congressional policy against piecemeal appeals, which is particularly  strong in the criminal area. Id.


18
For reasons similar to those we have discussed in rejecting an interlocutory appeal, we must deny the application for  a writ of mandamus. The government is not foreclosed from  seeking release of the information once the risk of its use  against defendants in this prosecution has passed. To the  extent the district court sought to protect the defendants' Fifth  Amendment rights, its decision did not constitute clear error,  oft-repeated error, or any disregard for the rules because our  decisions have not yet decided the amount of protection  required for financial affidavits. See Hitchcock , 992 F.2d at  239.


19
In Hitchcock, where the defendant appealed a district  court order refusing to seal a financial affidavit, this court  found that the Bauman factors pointed away from granting a  writ of mandamus. Id. Although we recognized that this circuit has not yet decided how much protection financial affidavits merit, we said that the issue is not "so important to  administration of the courts or to other litigants " to militate in favor of a writ. Id. The Bauman factors weigh against extraordinary relief in this case as well.


20
The appeal is DISMISSED; the alternative mandamus petition DENIED.

