Date: Apr 9, 2026

Tenth Circuit: Sua Sponte Rule 4(b) Dismissal of Untimely Criminal Appeal and Mootness/Nonfinality of Castro Recharacterization Notices

Introduction

In United States v. Jacobo (10th Cir. Apr. 7, 2026), defendant-appellant Luis Alfredo Jacobo sought appellate review of two post-remand rulings in his federal drug prosecution: (1) the district court’s denial of his request for appointment of counsel to pursue a resentencing hearing after partial reversal on direct appeal; and (2) the district court’s handling of his Rule 33 motion for a new trial, including an order advising it intended to recharacterize the filing as a motion under 28 U.S.C. § 2255.

The Tenth Circuit dismissed the appeal in full—holding the counsel-related appeal was untimely under Federal Rule of Appellate Procedure 4(b) (and enforceable sua sponte), and holding the recharacterization-related appeal was moot (and independently nonfinal and outside the court’s statutory appellate jurisdiction). The panel also denied Jacobo’s request for appellate counsel under 18 U.S.C. § 3006A.

Summary of the Opinion

Untimely appeal (appointment of counsel): Jacobo’s notice of appeal was filed beyond the 14-day deadline in FED. R. APP. P. 4(b)(1)(A), even applying the prison mailbox rule (FED. R. APP. P. 4(c)). Although Rule 4(b) is a non-jurisdictional claim-processing rule and the government did not invoke it, the Tenth Circuit enforced the time bar sua sponte because doing so served the rule’s purposes.
Mootness (recharacterization of Rule 33 motion): Jacobo appealed the order denying reconsideration of the district court’s notice of intent to recharacterize his Rule 33 motion as a § 2255 motion. After he filed his notice of appeal, the district court deemed the motion withdrawn. Because the challenged motion was no longer operative—and Jacobo did not appeal the withdrawal order—the appellate court could grant no effectual relief, rendering the dispute moot.
Independent jurisdictional barrier (nonfinal order): Even absent mootness, the “intent-to-recharacterize” order was not a “final decision” appealable under 28 U.S.C. § 1291 and did not fall within 28 U.S.C. § 1292(a)(1) (injunction-related interlocutory jurisdiction).
No appellate counsel under § 3006A: The court denied appointment of appellate counsel because the dismissed appeals did not involve “ancillary matters appropriate to the proceedings” within the meaning of 18 U.S.C. § 3006A(c), relying on circuit authority distinguishing habeas-type collateral proceedings.

Analysis

Precedents Cited

1) Procedural posture and mandate-limited remand

United States v. Jacobo, No. 23-5114, 2025 WL 481607 (10th Cir. Feb. 13, 2025): The prior direct appeal framed the remand. The earlier panel affirmed the CCE and communication-facility convictions but reversed the drug-conspiracy convictions and instructed the district court to vacate only those conspiracy convictions and sentences. The 2026 panel treated that mandate as dispositive of the district court’s authority on remand.
United States v. Walker, 918 F.3d 1134 (10th Cir. 2019): Quoted for the mandate rule principle that the district court has “no power or authority to deviate from the mandate.” This precedent underwrote the conclusion that, once the conspiracy convictions were dismissed and the related life sentence vacated, the district court lacked authority to conduct a broader resentencing on the remaining concurrent life sentence for the CCE conviction.

2) Timeliness of criminal appeal and sua sponte enforcement

United States v. Mitchell, 518 F.3d 740 (10th Cir. 2008): Central to the timeliness analysis. Mitchell holds that Rule 4(b) is a non-jurisdictional, “inflexible claim-processing rule” ordinarily invoked by the government—but also recognizes that courts may enforce it sua sponte when doing so advances systemic interests such as reducing uncertainty and conserving judicial resources.
Bowles v. Russell, 551 U.S. 205 (2007): Cited within the Mitchell discussion to distinguish jurisdictional appeal deadlines (typically civil) from non-jurisdictional claim-processing rules (as criminal Rule 4(b) is treated in this circuit’s framework).
United States v. Oliver, 878 F.3d 120 (4th Cir. 2017) and United States v. Gaytan-Garza, 652 F.3d 680 (6th Cir. 2011): Cited to show other circuits likewise recognize circumstances where courts may raise Rule 4(b) timeliness issues sua sponte.

3) Standard of review and pro se construction

United States v. Christy, 739 F.3d 534 (10th Cir. 2014): Provided the abuse-of-discretion standard for reviewing denials of reconsideration.
Garrett v. Selby Connor Maddux & Janer, 425 F.3d 836 (10th Cir. 2005): Cited for liberal construction of pro se filings, though the panel emphasized that leniency does not overcome jurisdictional or mandatory procedural barriers.

4) Mootness as a jurisdictional limit

McClendon v. City of Albuquerque, 100 F.3d 863 (10th Cir. 1996): Used for two propositions: mootness is jurisdictional, and appellate courts may raise it sua sponte.
In re Lang, 414 F.3d 1191 (10th Cir. 2005) and Steel Co. v. Citizens for a Better Env't, 523 U.S. 83 (1998): Cited to reinforce that jurisdiction is the “first and fundamental question” in every appeal.
In re Overland Park Fin. Corp., 236 F.3d 1246 (10th Cir. 2001) and Church of Scientology v. United States, 506 U.S. 9 (1992): Supplied the operative mootness test—whether a court can grant “any effectual relief whatever.”

5) Finality, interlocutory jurisdiction, and nonfinal procedural orders

Graham v. Hartford Life & Accident Ins. Co., 501 F.3d 1153 (10th Cir. 2007) and Rekstad v. First Bank Sys., 238 F.3d 1259 (10th Cir. 2001): Cited for the definition of a “final decision” under 28 U.S.C. § 1291 as one that ends the litigation on the merits.
Hayes Fam. Tr. v. State Farm Fire & Cas. Co., 845 F.3d 997 (10th Cir. 2017): Cited for the proposition that orders merely “setting the stage” for further proceedings are not final orders. The panel analogized the “intent-to-recharacterize” notice to such nonfinal, preparatory orders.

6) Recharacterization safeguards and collateral review channeling

Castro v. United States, 540 U.S. 375 (2003): The district court’s notice tracked Castro by warning Jacobo before recharacterizing his filing as a first § 2255 motion and offering him the option to withdraw or amend to include all claims. The Tenth Circuit’s discussion shows Castro functions as a procedural protection for defendants while channeling collateral attacks into § 2255.

7) Statutory counsel limits in collateral matters

United States v. Howell, 573 F. App'x 795 (10th Cir. 2014): Cited for the proposition that habeas petitions do not implicate the guarantee of counsel under 18 U.S.C. § 3006A in the same way as the direct criminal proceeding, supporting denial of appellate counsel in this dismissed, post-judgment context.

Legal Reasoning

1) The mandate rule foreclosed the resentencing premise

A critical driver of the panel’s approach is the mismatch between Jacobo’s requested relief (a “resentencing hearing”) and the remand’s limited scope. The earlier decision ordered vacatur of the drug-conspiracy convictions and sentences only. Under United States v. Walker, the district court could not expand proceedings beyond what the mandate permitted. With an independent, unaltered concurrent life sentence remaining on the CCE count, the district court concluded there was no resentencing to conduct, and therefore no basis to appoint counsel for a hearing it lacked authority to hold.

2) Rule 4(b) timeliness: non-jurisdictional but enforceable sua sponte

The panel treated Jacobo’s late notice of appeal as fatal under FED. R. APP. P. 4(b), notwithstanding the government’s silence. Relying on United States v. Mitchell, the court explained that while Rule 4(b) is not jurisdictional, it remains an “inflexible” claim-processing rule. The court then invoked the Mitchell carve-out permitting sua sponte enforcement where broader institutional values are implicated—particularly reducing uncertainty and avoiding waste of judicial resources caused by undue delay.

Notably, the panel also underscored the practical point that Jacobo’s motion sought counsel for a resentencing that was never authorized to occur. That contextual consideration strengthened the case for sua sponte enforcement: the appeal was both untimely and aimed at relief the courts could not grant within the mandate’s constraints.

3) Mootness: no live controversy after withdrawal of the underlying motion

Jacobo attempted to appeal the district court’s handling of his Rule 33 filing and its intent to recharacterize it as a § 2255 motion. But after his appeal was filed, the district court deemed the motion withdrawn based on Jacobo’s objections to recharacterization. Because Jacobo did not appeal the withdrawal order, the Tenth Circuit concluded it could not grant effectual relief as to how a nonexistent motion should be characterized. Under McClendon v. City of Albuquerque and the “effectual relief” standard articulated through In re Overland Park Fin. Corp. and Church of Scientology v. United States, the appeal was moot and therefore beyond Article III jurisdiction.

4) Independent barrier: the recharacterization notice was nonfinal and not an injunction order

The panel added a jurisdictional backstop: even if the issue were not moot, the “intent-to-recharacterize” order was not a final decision under 28 U.S.C. § 1291 because it did not resolve the merits of the Rule 33 motion; it merely set a procedural course. Under Hayes Fam. Tr. v. State Farm Fire & Cas. Co., such stage-setting orders are not final. Nor did 28 U.S.C. § 1292(a)(1) apply because the order did not concern an injunction, rejecting Jacobo’s “practical effect of refusing an injunction” theory as inapposite to a motion-characterization dispute.

5) Counsel on appeal under 18 U.S.C. § 3006A

Because the appellate court dismissed the appeal for untimeliness and lack of jurisdiction, and because the appealed matters were post-judgment efforts outside the direct-appeal merits, the panel held they were not “ancillary matters appropriate to the proceedings” within 18 U.S.C. § 3006A(c). Citing United States v. Howell, the court denied appellate counsel and directed Jacobo to § 2255 as the proper channel for challenging the remaining convictions—subject to § 2255(f)’s one-year limitation.

Impact

Reinforcement of mandate-limited remands: The decision signals that, in the Tenth Circuit, defendants should not assume that vacatur of some counts triggers a de novo resentencing on remaining counts. Where the mandate is narrow, district courts may lack authority to revisit undisturbed sentences—making post-remand “resentencing” motions (and related counsel requests) structurally defective.
Rule 4(b) compliance remains essential even without government objection: By enforcing Rule 4(b) sua sponte, the panel underscores that appellants cannot rely on forfeiture by the government. This is especially salient for incarcerated, pro se litigants where small timing errors can foreclose appellate review.
Practical guidance on Rule 33 vs. § 2255: The court treated Jacobo’s “new trial” arguments (legal invalidity, instructional error, and insufficiency theories) as quintessential collateral-attack claims ordinarily belonging in § 2255, not Rule 33. The discussion—tethered to Castro—highlights the judiciary’s gatekeeping role in preventing mis-captioned filings from circumventing habeas rules, while also protecting defendants from inadvertently burning their “first” § 2255 motion.
Appellate jurisdiction over recharacterization notices is narrow: Parties should expect that an “intent-to-recharacterize” order will be treated as nonfinal and typically unappealable immediately; if the underlying motion is withdrawn or superseded, any appeal will likely become moot.
Limited reach as precedent: The opinion is designated “not binding precedent” (except for law of the case, res judicata, and collateral estoppel), but it may be cited for persuasive value under FED. R. APP. P. 32.1 and 10th Cir. R. 32.1—meaning its reasoning may still shape district court and litigant behavior in similar post-remand procedural disputes.

Complex Concepts Simplified

Mandate rule: When an appellate court sends a case back (“remands”) with specific instructions, the district court must follow those instructions and generally cannot expand the proceedings beyond them. Here, the remand was limited to vacating the drug-conspiracy convictions and sentences; it did not authorize resentencing on the CCE count.
Claim-processing rule vs. jurisdictional rule: A jurisdictional rule limits the court’s power and cannot be waived. A claim-processing rule is mandatory but may be forfeited if not raised—though, as this case illustrates under Mitchell, courts sometimes enforce claim-processing rules on their own to protect systemic interests.
Prison mailbox rule: A prisoner’s filing is treated as filed when delivered to prison officials for mailing, not when received by the court. Even with that benefit, Jacobo’s notice of appeal was late.
Mootness: Federal courts decide live disputes. If something happens that makes it impossible to grant meaningful relief—like the withdrawal of the motion being fought over—the case becomes moot and must be dismissed for lack of jurisdiction.
Final decision (28 U.S.C. § 1291): Most appeals require a final decision—one that ends the litigation on the merits. A notice that the court intends to recharacterize a motion does not decide the merits and is generally not final.
Castro warning (recharacterization): If a court plans to treat a defendant’s filing as a first § 2255 motion, it must warn the defendant and allow withdrawal or amendment—because the first § 2255 motion carries important limits on later petitions.
Rule 33 motion vs. § 2255 motion: Rule 33 governs motions for a new trial (often based on newly discovered evidence). Section 2255 is the typical vehicle for claiming a federal conviction or sentence is unlawful (for example, due to legal or constitutional error). Jacobo’s arguments were treated as the latter in substance.

Conclusion

United States v. Jacobo is a procedural roadmap decision: it emphasizes that (1) remand instructions strictly constrain district court authority under the mandate rule; (2) criminal appeal deadlines under Rule 4(b) can be enforced sua sponte where systemic interests warrant, even if the government does not object; and (3) appellate jurisdiction evaporates when a challenged motion is withdrawn (mootness) or when an appealed order is merely preparatory and nonfinal. For defendants seeking post-remand relief, the opinion underscores the importance of choosing the correct procedural vehicle—most legal invalidity claims belong in § 2255—and meeting strict appellate timing requirements.