Opinion for the Court by Circuit Judge ROGERS.
Deonte Marshall was indicted for unlawful possession of a firearm, in violation of 18 U.S.C. § 922(g). Despite his repeated requests for a speedy trial, this straightforward one-count single defendant case languished in the district court for fourteen months — 436 days — before trial finally began. In delaying the trial the district court relied on a government filing, styled as a “motion” to admit evidence of other crimes pursuant to Federal Rule of Evidence 404(b), as a placeholder that would suspend operation of the Speedy Trial Act’s 70-day time limit, see 18 U.S.C. § 3161(c)(1). 1 This despite the district court’s acknowledged practice of not resolving such Rule 404(b) “motions” until immediately prior to trial or during the trial itself.
Although Marshall’s court appointed counsel filed a motion to dismiss the indictment for violation of the Speedy Trial Act, and a supplement, counsel did not challenge the district court’s exclusion of the time following the Rule 404(b) filing, which allowed the district court to conclude Marshall’s Speedy Trial Act rights were not violated. In failing to do so, counsel overlooked: (1) precedent of this court holding that a closely analogous evidentiary filing does not toll the Speedy Trial Act clock; (2) the prosecutor’s expression of concern during a hearing that the Rule 404(b) filing did not toll the Speedy Trial Act clock; and (3) Marshall’s own repeated pleas to the district court and his counsel to scrutinize the record for a Speedy Trial Act violation. Under the circumstances, the performance of his pretrial counsel was constitutionally deficient. In view of the violation of Marshall’s Sixth Amendment right to the effective assistance of counsel when counsel failed to challenge whether a Rule 404(b) filing tolls the 70-day period under the Speedy Trial Act, the court vacated the judgment of conviction and ordered a remand, with opinion to follow. See Order, May 13, 2011. This is that opinion.
I.
The grand jury returned its indictment on July 22, 2008 based on a weapon seized from a locked room during the execution of a search warrant of the house where Marshall lived with his mother. Marshall was arraigned on July 30, 2008, entering a plea of not guilty. 2 At the first status confer *290 ence, held August 19, 2008, the prosecutor expressed his view that “we do need to set a trial date today unless motions are going to be filed pretty soon.” Tr. Aug. 19, 2008, at 3. The district court responded that its practice was not to set trial dates “until later in the process,” id. at 4, and directed the prosecutor to “get your motions in the sooner the better,” id. at 5. The district court reiterated the message at the next status conference, held September 9, 2008, again declining to set a trial date and stating that the Speedy Trial Act clock would be tolled once motions were filed, and the court was “expecting at least one in the next day.” Tr. Sept. 9, 2008, at 10-11.
Two days later, on September 11, 2008, the fifty-first day after indictment (and the forty-seventh day on the Speedy Trial Act clock), the government filed a pleading styled as the “United States’ Motion to Admit Other Crimes Evidence Pursuant to Federal Rule of Evidence 404(b).” In this filing the government indicated that it intended to use evidence of the circumstances surrounding Marshall’s prior conviction for the same crime — unlawful possession of a firearm — as evidence that his possession of the seized weapon was knowing and intentional, not due to accident or mistake. At a status conference held on October 23, 2008 — the ninety-third day following indictment (the eighty-ninth day on the Speedy Trial Act clock) — defense counsel told the district court that he had not yet filed a motion to suppress the seized evidence and Marshall’s statement (unrelated to the prosecutor’s Rule 404(b) filing) because of an unexpected delay in obtaining a needed transcript. But, defense counsel continued, he thought that the delay “was not endangering [Marshall’s] Speedy Trial rights because the government had already filed a 404(b) motion.” Tr. Oct. 23, 2008, at 4. The district court responded: “It had. So the statute is tolled for now anyway.” Id.
The prosecutor, however, was not so sure, advising the district court that “there is perhaps some dispute in the case law about whether or not that type of motion” — referring to the Rule 404(b) filing— “is sufficient to ... toll the Speedy Trial [Act] clock.” Id. at 6. “[I]n an abundance of caution,” the prosecutor asked the district court to “make findings that the time has been spent ... in the interest of justice and for the sake of the defendant in this case[,] that the time would have been tolled anyway [even absent the Rule 404(b) filing].” Id. at 7. The district court refused, advising the prosecutor that “it is this Court’s practice and has been for seven years that a 404 motion is sufficient for the purpose [of tolling the clock].” Id.
The prosecutor’s concerns were well founded. In
United States v. Harris,
Then, three weeks before Marshall was indicted on July 22, this court applied
Harris’s
holding in
United States v. Van Smith,
Marshall, while perhaps unfamiliar with this development in the case law, was insistent that his speedy trial rights were being violated. At the end of the October 23, 2008 hearing, Marshall expressed his frustration with the delay in the proceedings, and suggested a willingness to proceed with trial immediately, repeatedly mentioning his “hundred days,” id. at 11, 12, presumably referring to the sum amount of non-excludable time allowed under the Speedy Trial Act between arrest and the start of trial. See 18 U.S.C. § 3161(b), (c)(1). At a December 2, 2008 status conference, Marshall asserted that his “Sixth Amendment [speedy trial right] has been violated and [his statutory] 70 days has been violated,” and further that he was willing to drop all of his motions if it meant he could go to trial that day. Tr. Dec. 2, 2008, at 10. On March 23, 2009, Marshall again expressed the view that his *292 right to a speedy trial had already been violated, and he implored the district court to “take a look at that [issue] really.” Tr. Mar. 23, 2009, at 19. Seemingly frustrated in part by the continued delays in the proceedings, Marshall asked for and received new appointed counsel on May 11, 2009; new appointed counsel entered his appearance on May 29, 2009. During a June 1, 2009 hearing, Marshall stated in court that the “Speedy Trial Act [has been] violated since last March” and he again asked the district court to examine the issue. Tr. June 1, 2009, at 12.
Despite these clear warning flags, Marshall’s counsel — both counsel who entered an appearance on August 4, 2008 and substitute counsel who took over on May 29, 2009 — did not challenge the district court’s ruling that a Rule 404(b) filing tolls the Speedy Trial Act clock. Nor did counsel raise the issue after the prosecutor referred to the Rule 404(b) filing as a “notice” — rather than a motion — during a hearing, nor when the district court indicated its practice was to rule on Rule 404(b) issues “either just prior to the trial or at the trial.” Tr. Mar. 23, 2009, at 5, 7. Indeed, counsel agreed with the district court’s exclusion of the time following the Rule 404(b) filing on at least three occasions: at the October 23, 2008 hearing, in a March 23, 2009 motion to dismiss under the Speedy Trial Act, and a June 24, 2009 supplement to the motion to dismiss. In the supplement counsel cited Van Smith for the proposition that the time following the government’s Rule 609 filing should not be excluded, but inexplicably (in view of both the majority and dissenting opinions) proceeded to argue that the speedy trial clock was tolled for forty days following the government’s Rule 404(b) filing. Then, through counsel, Marshall opposed the Rule 404(b) filing on June 3, 2009, and the district court heard argument on July 10, 2009, and took the matter under advisement. The record does not reflect that the Rule 404(b) issue was ruled on prior to trial. Neither does it reflect that the district court ruled on the speedy trial motion except to state, at a pretrial hearing, that it agreed with the prosecutor’s position and did not think the motion to dismiss was “going anywhere.” Tr. July 10, 2009, at 43.
In the end, the trial did not begin until October 1, 2009, 436 days after Marshall was indicted and the Speedy Trial Act clock began to run. 3 Although much of the time was properly excluded on account of pretrial motions and in the interest of justice, there is no dispute that but for the district court’s exclusion of time pursuant to the Rule 404(b) filing, the Speedy Trial Act’s seventy-day time limit was violated. The government appendix filed in this court and the district court docket reflect no other tolling events from August 4 to December 1, 2008 (when Marshall filed his motion to suppress evidence and the clock was tolled), which is more than 70 days after Marshall’s indictment. After a three-day trial, the jury found Marshall guilty of the lone firearm possession count and the district court sentenced him to eight years’ imprisonment and 36 months’ supervised release. Through new appointed appellate counsel, Marshall maintains, among other arguments, that his pretrial counsel were unconstitutionally ineffective *293 in failing to challenge the Rule 404(b) time exclusion for Speedy Trial Act purposes. We agree.
II.
The Sixth Amendment entitles a criminal defendant to the assistance of “reasonably effective” counsel.
Strickland v. Washington,
On the first prong, counsel is ineffective if counsel’s acts or omissions fall “outside the wide range of professionally competent assistance” based on “[pjrevailing norms of practice” and the “facts of the particular case, viewed as of the time of counsel’s conduct.”
Strickland,
The second prong of the
Strickland
analysis, prejudice, requires a decision on the merits of the Speedy Trial Act issue, because there is no possibility of a different outcome in the proceeding if the exclusion of the Rule 404(b) filing time was correct.
Harris
and
Van Smith
compel the conclusion that a Rule 404(b) filing is a notice rather than a motion that tolls the Speedy Trial Act clock. This follows from the well settled rule acknowledged by the
en banc
court that the procedure for admitting Rule 404(b) evidence is identical to the notice-and-objection procedure for Rule 609 material: “The government must identify which of the matters listed ... it
*294
is intending to prove.... If the defense objects, the court must then satisfy itself that the evidence is relevant to that matter.”
Crowder,
On appeal, the government brief makes no meaningful effort to distinguish a Rule 609 filing from a Rule 404(b) filing, instead suggesting that
Harris
and
Van Smith
were wrongly decided and citing cases from other circuits that purportedly contradict our precedent. In fact, the Ninth and Eleventh Circuit cases cited by the government,
United States v. Gorman,
At oral argument, government counsel suggested that even if there is no distinction to be made in the generic case, here the prosecutor sought a pretrial ruling on the matter, going as far as to attach a proposed order to the Rule 404(b) filing. Be that as it may, the prosecutor also referred to the filing as a “notice,” Tr. Mar. 23, 2009, at 5, did not object when the district court declared its intention to reserve judgment on the Rule 404(b) issue until during or immediately before trial, and did not argue that Marshall had conceded the Rule 404(b) “motion” when his counsel waited over eight months to file an opposition,
see
D.D.C. Local Crim. R. 47(b). In any event, the controlling question is neither the degree of diligence with which counsel sought disposition of the filing, nor the “labels applied by the parties to their filings,”
Van Smith,
The government’s other argument concerning prejudice is equally unpersuasive.
*295
It contends that the district court would not have granted a motion to dismiss even if Marshall had properly raised the issue because it was firmly convinced that a Rule 404(b) filing tolled the Speedy Trial Act clock. Putting aside the dubious premise that the district court would have erred had the issue been properly put before it, raising the issue would at least have preserved it for appeal, and thus Marshall would have secured dismissal of the indictment, later if not sooner. At oral argument government counsel also maintained that any dismissal of the indictment would have been without prejudice under the Speedy Trial Act, 18 U.S.C. § 3162(a)(2), and that dismissal of the indictment without prejudice is an insufficient showing of
Strickland
prejudice. Because the government raised this argument for the first time at oral argument, we decline to consider it.
See Ark Las Vegas Rest. Corp. v. NLRB,
In vacating the judgment of conviction by order of May 13, 2011, the court remanded the case for the district court to determine whether the dismissal should be with or without prejudice.
See
18 U.S.C. § 3162(a)(2);
United States v. Sanders,
As a result, this court has no occasion to reach two of Marshall’s three other contentions. His Speedy Trial Act claim— subject to plain error review because the Rule 404(b) issue was not raised in the district court — would result in the same relief granted here for ineffective assistance of counsel, and thus there is no need to decide whether the error was plain. And his claim of jury coercion by the district court as a result of
ex parte
and other interactions with one juror who “decided his fate,” Appellant’s Br. 31, would result only in a new trial, and thus it, too, need not be decided. Regarding Mar
*296
shall’s contention that his Sixth Amendment right to a speedy trial was also violated and that the government did not overcome the presumption of prejudice for delays of longer than one year, factual findings are required pursuant to
Barker v. Wingo,
Accordingly, we vacated the judgment of conviction because Marshall was denied his right under the Sixth Amendment to the effective assistance of pretrial counsel, and remanded the case for the district court to determine whether dismissal for violation of the Speedy Trial Act shall be with or without prejudice to his re-prosecution. See Order, May 13, 2011. If the district court determines that the dismissal of the indictment should be without prejudice, then it must make findings in order to determine, in the first instance, whether Marshall’s right to a speedy trial under the Sixth Amendment was violated.
Notes
. The Speedy Trial Act provides that:
In any case in which a plea of not guilty is entered, the trial of a defendant ... shall commence within seventy days from [the later of (1) ] the filing date ... of the information or indictment, or ... [ (2) ] the date the defendant has appeared before a judicial officer of the court in which such charge is pending....
18 U.S.C. § 3161(c)(1) (2006). The Act provides that seven “periods of delay shall be excluded in computing ... the time within which the trial ... must commence.” Id. § 3161(h). Relevant here, one such period is “delay resulting from any pretrial motion from the filing of the motion through the conclusion of the hearing on, or other prompt disposition of, such motion.” Id. § 3161(h)(1)(D).
. The next day, July 31, 2008, his appointed counsel filed a motion to withdraw, which motion was granted four days later, on August 4, 2008, at which time his new appointed *290 counsel entered an appearance. The withdrawal motion tolled the Speedy Trial Act clock for four days. See Fed. R.Crim. P. 45(a)(1)(A).
. Marshall had already appeared in court on a parallel criminal complaint that was dismissed prior to his indictment. Hence, Marshall maintains, and the government does not dispute, that the Speedy Trial Act’s 70-day period began to run on the date of his indictment, July 22, 2008, and not on the date of his subsequent arraignment. See 18 U.S.C. § 3161(c)(1). The eight day difference has no effect on the violation of the Speedy Trial Act 70-day timeline.
. We note that the Supreme Court recently held that filing a pretrial motion tolls the Speedy Trial Act clock "irrespective of whether it actually causes, or is expected to cause, delay in starting a trial."
United States v. Tinklenberg,
- U.S. -,
. We need not reach Marshall’s alternative claim of Strickland prejudice resulting from the delay preventing his trial from occurring before a change in law rendered admissible a videotaped post-arrest statement that previously would have been inadmissible in the government’s case-in-chief.
