GURFEIN, Circuit Judge:
This appeal raises questions concerning delay in bringing a defendant to trial in the federal court after dismissal of state charges arising out of the same transaction. There is no problem of double jeopardy, United States v. Lanza, 260 U.S. 377, 43 S.Ct. 141, 67 L.Ed. 314 (1922); Abbate v. United States, 359 U.S. 187, 79 S.Ct. 666, 3 L.Ed.2d 729 (1959), and there would be no doubt that the federal indictment was properly brought if the question of delay were not involved.
The District Court for the Eastern District of New York (Hon. Jack B. Weinstein, Judge) dismissed an indictment against Mrs. Lai Ming Tanu for drug offenses on July 11, 1978. The conspiracy to distribute heroin charged in the indictment allegedly occurred from May 29 to May 30, 1974— more than four years earlier, but within the period of the statute of limitations. The substantive counts charged that the defendant possessed the heroin with intent to distribute on May 30, 1974. The charges thus arose from a single transaction over a two-day period, and the first trial in the federal District Court began more than four years after the state arrest.
After two mistrials, the District Court dismissed the indictment “pursuant to the Sixth Amendment, the Eighth Amendment, the inherent power of th[e] court to control its own procedures under Article III of the Constitution and the policy of the United States as reflected in Rule 50(b), in the Speedy Trial Act, and in the various plans adopted pursuant to the authority of those provisions.”1 The court added that the dismissal was not “for failure of proof” nor “for reasons of double jeopardy”2 and suggested that the Government'should appeal “to determine whether [the court] has any residual powers in this area.” The United States appeals, pursuant to 18 U.S.C. § 3731. It contends that the District Court erred in dismissing the indictment. To understand the questions of law raised by the Government,' it is necessary to review in some detail the proceedings, both state and federal, that led to the order of dismissal.
The defendant Lai Ming Tanu was arrested by New York City Police (accompa[84]*84nied by federal agents) on May 30,1974, for allegedly participating in the sale of heroin to undercover police officers with two others, Yeo Chin Nee and Lee Swee Lye. The undercover police officers were part of a joint federal-state Task Force; federal agents of the Drug Enforcement Administration (DEA) participated with New York City Police in the arrests. United States Government money was used to purchase the heroin, and the heroin was taken into custody by the DEA, not the City Police.
The federal government, at that point, had all the evidence it needed for a successful prosecution. The joint task force decided, however, to prosecute the three defendants in the state court, which imposes heavier statutory sentences.3 Accordingly, on the next day, May 31, 1974, Mrs. Tanu and the others were arraigned on state charges in the New York County Criminal Court. On June 21, 1974, they were indicted by a New York County Grand Jury on three felony counts: criminal sale of a controlled substance (about two pounds of heroin) in the first degree and criminal possession of a controlled substance in the first and third degrees. Lee Swee Lye and Yeo Chin Nee, who actually made the sale, entered pleas of guilty on February 3, 1976, in the Supreme Court, New York County, and were sentenced to imprisonment in March 1976.
After Mrs. Tanu appeared on sixty-four occasions in the state Supreme Court, where she continually requested a speedy trial, that court, in September 1976, dismissed the by-then 27 month old indictment against Mrs. Tanu (with prejudice), on the ground that the defendant had been denied her right to a speedy trial under the Sixth Amendment and under New York Criminal Procedure Law § 30.20 (McKinney 1971 & 1978 Supp). The state Special Narcotic Prosecutor elected not to appeal.
The DEA agent who was acting as liaison on the case, John Gartland, knew of the state's decision not to press the matter further but took no action at the time. Nothing was done by the United States to charge Mrs. Tanu from September 1976 to May 15, 1978 when the instant federal indictment was filed — about twenty months later.
The renewed federal interest in Tanu came about through an accident. The Government’s brief recites the following chronology of events. In February 1977, Special Agent Robert Allen of the DEA— who was not a Task Force member — received an inquiry from Singapore concerning the status of the arrest involving Lee Swee Lye. Allen did not attend to the matter until April 1977. When he finally received the Lee Swee Lye file, he noticed that Mrs. Tanu had not been convicted in the- state prosecution. Shortly thereafter, Margaret and Ernest Rossi, who had been arrested for the sale of heroin, told DEA agents that their source of supply was one “Anna Chu” — which was believed to be another name for Lai Ming Tanu. The United States Attorney’s Office negotiated with the Rossis in an effort to get them to testify against Tanu, but their efforts failed, and in October 1977, the Rossis elected to stand trial. Agent Allen then referred the matter of Tanu to the United States Attorney’s Office, which opened a file on her in November 1977. On December 20,1977, the United States Attorney requested approval to prosecute from the Department of Justice, apparently because the Department guidelines require permission from the Attorney General for a federal prosecution after a state prosecution for the same offense. See Petite v. United States, 361 U.S. 529, 80 S.Ct. 450, 4 L.Ed.2d 490 (1960). The United States Attorney received approval to prosecute in early February 1978.4
[85]*85Three months later, on May 15,1978, Mrs. Tanu was indicted by the federal grand jury for the same transaction that was the subject of the state indictment. The federal indictment also included a charge of possession of heroin found at the Pan American Motor Inn (see below), on which the county grand jury had refused to indict, together with a charge of conspiracy covering possession on May 30, 1974, the same date as alleged in the state indictment. By now, the act of possession which constituted the gravamen of both the state and federal charges (as is not uncommon in narcotics cases) had occurred four years earlier, and the state prosecution had already been dismissed twenty months before on Sixth Amendment grounds.
Judge Weinstein held initially that there was neither a Sixth Amendment nor a speedy trial ground for dismissing the federal indictment, despite the surface anomaly that the state court had already dismissed its indictment on speedy trial grounds. He accordingly ordered the case to trial, denying the Government’s motion to postpone the trial because of the defendant’s obviously pregnant condition, which the prosecution feared might elicit sympathy from the jury.
The first trial began on June 30, 1978. The Government’s case indicated that at 7:00 P.M. on May 30, 1974, two police officers, acting in an undercover capacity, paid $52,000 in pre-marked official Government funds to Yeo Chin Nee and Lee Swee Lye in Room 26 of the Queens Motel. The defendant Tanu was sitting at the time in a telephone booth located in the lobby near Room 26. She was holding the receiver to her ear but did not appear to be talking. Lee Swee Lye left Room 26 carrying the money paid by the police officers, whereupon Tanu hung up the phone, left the booth, and accompanied Lee Swee Lye upstairs to Room 55. While waiting for Lee Swee Lye and Tanu to emerge, Detective Wright and Agent Gartland heard talking in Chinese and the sound of money being counted. When the door was opened, Tanu and Lee Swee Lye were arrested. In Mrs. Tanu’s handbag, the officers found $37,000 of the pre-marked money, a key and a payment receipt in the name of “Tanu” for Room 504, Pan American Motor Inn, Queens (which was less than a mile from the Queens Motel), and keys to Tanu’s safe deposit box at the China Safe Deposit Box Company. Pursuant to a search warrant obtained from a state judge, Room 504 of the Pan American Motor Inn was searched early the next morning. A cosmetic case found in that room contained 652 grams of heroin wrapped in a Chinese language newspaper. On June 19, 1974, a consent search of the safe deposit box turned up $10,600 in cash.
Lee Swee Lye, though attempts were made by the Government to sway him to the contrary, testified for the defense. He swore that Tanu was his “girlfriend” on May 30, 1974 and that she had no knowledge of the sale of heroin to the police; that he had asked her to join him at the Queens Motel only for companionship; and that he had asked her to carry the money found in her pocketbook, telling her he had won it on a horse race. He also swore that the heroin found in Room 504 of the Pan American Motor Inn was his, and that Tanu did not know that the package contained heroin.
With the issue of guilt or innocence thus clearly posed, the prosecution, in rebuttal, called Margaret Rossi (who by now had been convicted in her own case). She testified that when she was a heroin addict between 1970 and 1972 she purchased heroin more than twenty times from the defendant, whom she knew as “Anna Chu.” To counter this damaging testimony, the defendant called her husband, Jack Tanu, who testified that he met the defendant in Hong Kong in 1969 and married her there in 1972; that the defendant then lived with her father in Hong Kong; and that the father died in October 1975. Mr. Tanu further testified that the defendant had never been in the United States before May 1973, and her immigration papers and passport showed that she apparently first entered the United States on that date.
[86]*86The first trial resulted in a mistrial, based upon the jury’s inability to agree on a verdict, on July 5, 1978. The court refused to dismiss the indictment and the second trial began the next day, July 6, 1978. This time the defendant did not offer any evidence. Again the jury was unable to reach a verdict, and on the defendant’s motion a second mistrial was declared. The judge then dismissed the indictment for the reasons noted above.
Opposing the dismissal, the Government moved for an adjournment until after the defendant had given birth to her baby, and represented that if there should be a jury deadlock on the third trial there would be no further prosecution. The court noted that the defendant was not due to have her child until November, that at least another four months would go by before any possible retrial, and that it “is cruel to place a pregnant woman under that burden facing another trial. ... I really think that some sensibilities and some humanity is not beyond the realm of consideration.” The judge dismissed the indictment.
I
In United States v. Weinstein, 452 F.2d 704 (2d Cir. 1971), cert, denied, 406 U.S. 917, 92 S.Ct. 1766, 32 L.Ed.2d 116 (1972), we held that while a district court may grant a new trial after conviction, pursuant to Fed.R.Crim.P. 33, “in the interest of justice,” it does not have power to dismiss an indictment that is legally sufficient under the test of Rule 29, simply because it deems the dismissal to be in the interests of justice.5 In a scholarly opinion, Judge Friendly noted the absence of any such affirmative authority to dismiss either in the Federal Rules or at common law here or in England.6
Under the separation of powers, the executive branch, rather than the judiciary, retains the power to dismiss prosecutions on [87]*87other than strict grounds of insufficiency in law. In his last opinion, the late Judge Murrah wrote: “The Executive remains the absolute judge of whether a prosecution should be initiated and the first and presumptively the best judge of whether a pending prosecution should be terminated.” United States v. Cowan, 524 F.2d 504, 513 (5th Cir. 1975), cert. denied, 425 U.S. 971, 96 S.Ct. 2168, 48 L.Ed.2d 795 (1976).
The emphasis in recent years on the speedy trial provision of the Sixth Amendment, see Barker v. Wingo, 407 U.S. 514, 92 S.Ct. 2182, 33 L.Ed.2d 101 (1972), on the concomitant Rule 48(b), on the interim Speedy Trial Plans and, now, on the Speedy Trial Act, has added a new dimension. Regardless of the defendant’s guilt or innocence, courts are permitted to exercise the power of dismissal against the wishes of the prosecutor when there is a failure to prosecute that is unjustified either because of the literal application of the statute or because of a showing of prejudice to the accused or an intentional delay by the prosecution to effect such prejudice.
The District Court, accordingly, treated this case properly as going beyond United States v. Weinstein, supra, in that it implicated considerations of the denial of speedy trial, with which our decision in that case was not concerned. We turn to those considerations.
II
The first question is whether appellee, a defendant in the federal court, can be considered as “accused” before she has been subjected to a federal arrest, or whether she is merely in a pre-prosecution period even though she was subjected to the state arrest with the acquiescence of the federal government.
In United States v. Marion, 404 U.S. 307, 92 S.Ct. 455, 30 L.Ed.2d 468 (1971), the Court held that a pre-prosecution delay is not a constitutional ground for dismissing an indictment under the Sixth Amendment. The Court noted, however, “that the Due Process Clause of the Fifth Amendment [as distinct from the Sixth Amendment Speedy Trial Clause] would require dismissal of the indictment if it were shown at trial that the pre-indictment delay in this case caused substantial prejudice to appellees’ rights to a fair trial and that the delay was an intentional device to gain tactical advantage over the accused.” Id. at 324, 92 S.Ct. at 465 (emphasis added; footnote omitted).
This application of a Due Process claim was diluted somewhat in United States v. Lovasco, 431 U.S. 783, 97 S.Ct. 2044, 52 L.Ed.2d 752 (1977). After stating “that the Due Process Clause has a limited role to play in protecting against oppressive delay,” id. at 789, 97 S.Ct. at 2048, the Court announced that proof of prejudice was necessary, and that even when such actual prejudice is shown, the inquiry must also consider the reasons for the delay as well as the prejudice to the accused. Id. at 790, 97 S.Ct. 2044.
Putting aside for the moment the alternative “Due Process” ground, these eases make it clear that pre-indictment delay is not, as a general matter, a violation of the Sixth Amendment.
Neither Marion nor Lovasco, however, concerned the situation where a defendant had been arrested for a state crime and was later indicted for substantially the same offense by a federal grand jury. The Supreme Court has not yet ruled on whether, for Sixth Amendment purposes, the defendant in such circumstances could ever be treated as an “accused” during the period before his federal arrest or indictment.
We have been confronted with such a situation in this Circuit, however. United States v. Mejias, 552 F.2d 435 (2d Cir.), cert, denied, 434 U.S. 847, 98 S.Ct. 154, 54 L.Ed.2d 115 (1977). We were faced with three claims in Mejias under: (1) the Southern District Interim Plan pursuant to the Speedy Trial Act of 1974; (2) the Sixth Amendment and Rule 48(b) (Fed.R.Crim.P.) coterminous therewith, id. at 442; and (3) the Due Process Clause of the Fifth Amendment, id. at 443.
Our decision in Mejias disposed of each of the three claims on separate grounds, as we [88]*88shall see. In Mejias, the relevant facts were close to the facts at bar. There, too, there was a joint federal-state investigation of illegal narcotics activity. There, too, the arrest and indictment were by the state with the agreement of the federal government. And there, as here, defendants asserted that their federal statutory and constitutional speedy trial rights attached on the dates of their respective arrests by the New York authorities.
We disagreed with respect to the Interim Speedy Trial Plan “[f]or reasons of policy and precedent.” 552 F.2d at 441. Judge Lumbard noted that such a holding would tend “to force immediate federal indictments and trials of state arrestees in joint jurisdiction cases” thereby further crowding the federal court calendar in contravention of the purpose of the local district plan. Id. at 442. We, therefore, rejected the date of the state arrest as being the “arrest” meant in the Interim Plan for Speedy Trials.7
We recognize that despite the similarities between the two cases, the facts here do differ from those in Mejias in important respects. Here the contraband evidence was taken by the federal government at the time of arrest. In the Mejias case, the federal government could not proceed until it obtained the contraband evidence from the state, an event which did not occur until one year after the state arrests, and only five months before the federal indictment. 552 F.2d at 440-41. In Mejias, the Government actually conducted a fresh investigation, procured new evidence and added some conspirators. The resulting federal indictment was thus broader in scope than the state indictment. Here, on the other hand, the basis for the federal indictment was possession of narcotics on the same day as charged in the state indictment, by the single remaining unconvicted defendant in the state proceeding. The prosecution in practical effect, though not technically, was the same prosecution-. Finally, in Mejias, the federal government picked up rather promptly after the state had simply lost a round in the suppression hearing. Id. at 440-41. In this case, federal authorities did not decide to prosecute for a year and a half after there was an actual dismissal of the state indictment for failure to afford appellee her Sixth Amendment (through the Fourteenth Amendment) right to a speedy trial. Despite these factual distinctions, however, we are bound to say that in the light of Mejias a defendant does not become an “accused” for Speedy Trial Act purposes until he is under federal arrest. Mejias is a binding precedent, and we independently agree with its holding so far as the Speedy Trial Act claim is concerned.
Turning to the Sixth Amendment claim in Mejias, supra, we accepted as our premise the balancing considerations of Barker v. Wingo, supra, particularly, (i) the length of the delay, (ii) the reason for the delay-, (iii) prejudice to the defendant, and (iv) the defendant’s assertion of his rights. After disposing of the claim based on the Interim Plan, we recognized, with regard to the constitutional claim under the Sixth Amendment, that there were “[different considerations.” 552 F.2d at 442. Applying the balancing test of Barker v. Wingo, supra, we found it unnecessary to decide, however, whether the dates of the state arrests were crucial for Sixth Amendment purposes, for we held that even if those dates were taken to be the starting dates, there was still no constitutional speedy trial violation on the facts. Id. at 442-43.
The question remains open, therefore, whether there are circumstances under which the Sixth Amendment speedy trial provision, as interpreted in Barker v. Win-go, may be applied continuously to successive state and federal prosecutions for the same transaction. See United States v. Cabral, 475 F.2d 715 (1st Cir. 1973).
One of the troublesome aspects of our federal system is its duality and the occasional overlapping of state and federal prosecutions. It is settled, of course, that successive state and federal prosecutions do [89]*89not amount to double jeopardy. United States v. Lanza, supra; Abbate v. United States, supra. But some sensitivity exists lest separate prosecutorial powers be asserted to the prejudice of the accused. See United States v. Cabral, supra. For instance, the Supreme Court rejects the “silver platter” doctrine which formerly held admissible in federal prosecutions evidence that had been seized in violation of Fourth Amendment standards by state police. See Elkins v. United States, 364 U.S. 206, 80 S.Ct. 1437, 4 L.Ed.2d 1669 (1960). In the self-incrimination context as well, the Court has departed from rigid adherence to the dual sovereignty conception of King of the Two Sicilies v. Willcox, 61 Eng.Rep. 116 (1851). See Murphy v. Waterfront Commission, 378 U.S. 52, 84 S.Ct. 1594, 12 L.Ed.2d 678 (1964). We recognize that the dual nature of our judicial system can sometimes lead to injustice. In fact, the Supreme Court is quick to acquiesce in decisions by the Department of Justice to undo federal prosecutions when state prosecutions for substantially the same offense have preceded. Petite v. United States, supra; see Rinaldi v. United States, 434 U.S. 22, 98 S.Ct. 81, 54 L.Ed.2d 207 (1977) (and cases cited id. at 25 n.8, 98 S.Ct. 81).
Since the question is not foreclosed, we leave open whether the Sixth Amendment speedy trial provision may ever be invoked when a federal defendant who has already been prosecuted in the state court shows prejudice. We do not reach that question on this appeal, however, because the District Court found that, in fact, there was no such prejudice. We agree with that finding.
Applying the tests of Barker v. Wingo, supra, we note that the only arguably improper delay attributable to the federal government is the period of twenty months between the dismissal of the state indictment and the filing of the federal indictment. During those twenty months, there was no trial prejudice from the loss of evidence. See infra p. 89. Nor was the appellee subject to any of the restrictions, dehors the trial itself, which sometimes can give rise to prejudice. During those twenty months appellee was not in prison, nor was she under the restrictions of bail. The finality that appeared to accompany the state dismissal made those twenty months a period of ostensible relaxation from peril. There was no burden cast upon her simply because she was a person formerly accused and now discharged. Cf. United States v. Hillegas, supra (considering statutory speedy trial right only).
Ill
Nor, if we turn to the Due Process Clause of the Fifth Amendment, can we conscientiously find that there was substantial prejudice to Mrs. Tanu’s right to a fair trial, or that the delay by the federal government was an “intentional device to gain tactical advantage over the accused.” Marion, supra, 404 U.S., at 324, 92 S.Ct. at 465. We are not at liberty to broaden these grounds, considering the “limited role” of the due process clause in this area. Lovasco, supra 431 U.S. at 789, 97 S.Ct. at 2048.
The only possible prejudice at trial to appellee Tanu would have resulted during this period either from the death of her father, or from the intentional act of the prosecution in waiting for the Rossis to become witnesses. The District Judge, as we have seen, made no finding of prejudice for good reason. The father died in October 1975, and the state prosecution was pending until the dismissal in September 1976. Before that dismissal, the federal abstention was clearly proper. See Mejias, supra, at 443. Any delay by the federal government after the death of the father could not have prejudiced the appellee. Nor was there any proof that the post-dismissal delay was intentional on the part of the Government. There was, it is true, an extraordinary lack of liaison between state and federal prosecutors, which should be corrected, but there was nothing sinister about the breakdown in communications.
It may be suggested, of course, that waiting for the Rossis to cooperate was an unjustified delay. But the Rossis told the federal agents about appellee before her [90]*90federal indictment. In Lovasco, supra, Mr. Justice Marshall laid down a general rule that the Government, before indictment, can wait to get more evidence in order to preclude unwarranted prosecutions and to make more certain a verdict of guilty. The trial court could not have found, without abusing its discretion, that the delay was an “intentional device to gain tactical advantage over the accused.” Marion, supra, 404 U.S. at 324, 92 S.Ct. at 465.
IV
We can, therefore, find no escape from the conclusion that the District Court had no basis for dismissing the indictment on due process grounds, any more than on Sixth Amendment grounds, since prejudice, in the sense of a loss of evidence, was not shown.
Without evaluating guilt, there is, to be sure, room for the compassionate impulse in these circumstances. For here we find a concatenation of events that borders on the bizarre. Mrs. Tanu’s ordeal in being unable to get a speedy trial in the state court, the inertia of the federal government, the two mistrials, her pregnancy and progressive physical deterioration in the presence of the trial judge, all these call for some sympathetic consideration. We think, however, that the power to give effect to such considerations lies with the Department of Justice, and not with the trial court. -
We acknowledge with respect the sensibilities of the learned District Judge. In our system of imperfect justice there is, at times, a temptation to do what we think is more perfect justice. In an ordered system of criminal law we cannot, however, without statutory or rule-making authority, turn over to the judge the prerogatives and duties of the prosecutor. Judge Weinstein was aware that his power to dismiss was in doubt and he conscientiously urged the Government to appeal. •
Appellee may be viewed, indeed, as a unique object of sympathy or simply as another person accused of a serious crime. The United States Attorney says that the Government will drop the prosecution if there is a third mistrial. Perhaps the Department of Justice will reconsider and decide to drop the prosecution after these two mistrials and such long delay, taking into consideration the necessary further delay attendant upon the birth of the child. We simply hold that this decision is in the hands of the prosecutor, not of the trial judge.
The order for dismissal is reversed and the indictment is reinstated.