Failure to Object to a Magistrate Judge’s Suppression Recommendation Forfeits Appellate Review; “Government-Agent” Conspiracy Instruction Required Only Where Risk of Agent-Only Agreement Is Substantial

I. Introduction

In United States v. William Glover (4th Cir. Aug. 6, 2026) (unpublished), the Fourth Circuit affirmed William Kevin Glover’s jury convictions for a fentanyl-and-methamphetamine trafficking conspiracy and related substantive drug offenses, as well as maintaining a drug-involved premises. The district court imposed an aggregate 327-month sentence (driven by a 327-month term on Count Nine, with concurrent 240-month terms on other counts).

Appellate counsel filed an Anders v. California brief identifying potential issues but asserting no meritorious grounds for appeal. The panel addressed: (1) a suppression ruling referred to a magistrate judge; (2) self-representation; (3) the absence of a jury instruction that a defendant cannot conspire with a Government agent; (4) denial of a Rule 33 new-trial motion based on a prospective juror’s comment during voir dire; and (5) sentence reasonableness.

II. Summary of the Opinion

  • Suppression: The court held Glover forfeited appellate review because he did not file timely, specific objections to the magistrate judge’s recommendation after being warned of the consequences.
  • Self-representation: The court found no error in the district court’s denial (citing United States v. Frazier-El).
  • Jury instruction (government-agent conspiracy): No abuse of discretion in declining to give the “government-agent instruction,” because there was little risk the conspiracy conviction rested solely on controlled-buy evidence involving agents; substantial evidence showed agreements with multiple non-agent coconspirators.
  • New trial (voir dire comment): No abuse of discretion in denying a Rule 33 motion where a prospective juror stated she had a young relative die from a heroin/fentanyl overdose, the court immediately dismissed her, defense counsel did not request further inquiry, and there was no showing of actual prejudice.
  • Sentence: The within-Guidelines sentence was procedurally and substantively reasonable.
  • Anders practice: The panel emphasized the need for adequate Anders briefing, citing the dual screening function described in Penson v. Ohio.

III. Analysis

A. Precedents Cited (and How They Shaped the Result)

1. Waiver/forfeiture of appellate review for failure to object to a magistrate judge’s recommendation

  • United States v. Henderson, 136 F.4th 527 (4th Cir. 2025): Provided the baseline suppression-review framework (legal issues de novo; factual findings for clear error, viewing evidence favorably to the Government). The panel, however, did not reach that merits review because it found forfeiture.
  • Wright v. Collins, 766 F.2d 841 (4th Cir. 1985) and Thomas v. Arn, 474 U.S. 140 (1985): Established that timely, specific objections are required to preserve appellate review when parties are warned of noncompliance consequences.
  • United States v. Midgette, 478 F.3d 616 (4th Cir. 2007): Supplied the specificity requirement—objections must “reasonably” alert the district court to the true ground. Applied here, total non-objection meant the suppression issue was not preserved at all.

Doctrinal takeaway: The decision reinforces that appellate review of suppression issues can be lost on procedure alone: when a magistrate judge issues a recommendation under 28 U.S.C. § 636(b)(1), the failure to file timely, specific objections—after a clear warning—will forfeit review in the Fourth Circuit.

2. Requested jury instructions and the “government-agent instruction” in conspiracy cases

  • United States v. Savage, 885 F.3d 212 (4th Cir. 2018): Set the abuse-of-discretion standard for both whether to give an instruction and its content.
  • United States v. Lewis, 53 F.3d 29 (4th Cir. 1995): The key comparator. Lewis found reversible error where the “bulk” of the evidence involved an agent and the remaining evidence of a non-agent agreement was “conflicting,” creating a “strong possibility” the jury convicted based on an impermissible agent-only “agreement.”
  • United States v. Bartko, 728 F.3d 327 (4th Cir. 2013): Added that even if an instruction is wrongly refused, the defendant must show prejudice on the record as a whole.
  • United States v. Green, 599 F.3d 360 (4th Cir. 2010): Cited for the substantive notion that conspiracy liability requires proof of knowing, voluntary participation—supporting the panel’s view that the evidence showed agreements with “numerous individuals,” not merely controlled-buy interactions with agents.
  • United States v. Henderson, 136 F.4th 527 (4th Cir. 2025): Quoted for the “heavy burden” faced by instruction challengers, emphasizing district court discretion in framing the charge.

How precedent drove the outcome: The panel treated Lewis as the limiting case: the government-agent instruction becomes critical when the evidentiary profile could realistically cause jurors to treat agent interactions as the conspiracy itself. Here, the court found that profile absent—substantial non-agent conspiracy evidence and an instruction framing Count One as a conspiracy among Glover and named coconspirators—so no abuse of discretion and no prejudice.

3. New trial standards and voir dire prejudice

  • Fed. R. Crim. P. 33(a): Provides the “interest of justice” authority to vacate a judgment and grant a new trial.
  • Hicks v. Ferreyra, 64 F.4th 156 (4th Cir. 2023): Supplied the narrow grounds for granting a new trial (verdict against clear weight, based on false evidence, or miscarriage of justice) and the “exceptional circumstances” posture for reversal when a new trial is denied.
  • United States v. Dillard, 891 F.3d 151 (4th Cir. 2018): Defined abuse of discretion (arbitrary/irrational action, failure to consider recognized factors, reliance on erroneous premises, or legal error).
  • United States v. LaRouche, 896 F.2d 815 (4th Cir. 1990): Emphasized preservation during voir dire—“a specific objection or request” is required. The panel used this to underscore that defense counsel, despite an invitation to raise concerns, requested no additional inquiry and raised no objection.
  • United States v. Powell, 850 F.3d 145 (4th Cir. 2017): Restated the presumption of juror impartiality; jurors need not be “totally ignorant” of the issues; the inquiry is whether they can set aside impressions and decide on the evidence.
  • United States v. Tegzes, 715 F.2d 505 (11th Cir. 1983): Used as persuasive authority rejecting the notion that a juror’s awareness of drug harms alone creates disqualifying prejudice.
  • United States v. Hines, 943 F.2d 348 (4th Cir. 1991): Supported reliance on curative/limiting instructions reminding jurors to decide solely on evidence and law.

How precedent drove the outcome: The panel combined (i) the high bar for Rule 33 relief (Hicks v. Ferreyra), (ii) the absence of a preserved voir dire complaint (United States v. LaRouche), (iii) the presumption of impartiality and the modest threshold for juror exposure to charged topics (United States v. Powell), and (iv) curative instructions (United States v. Hines) to conclude there was no “interest of justice” basis for a new trial.

4. Appellate sentencing review and within-Guidelines deference

  • United States v. McCoy, 804 F.3d 349 (4th Cir. 2015) and Gall v. United States, 552 U.S. 38 (2007): Framed “reasonableness” review under a deferential abuse-of-discretion standard.
  • United States v. Lynn, 592 F.3d 572 (4th Cir. 2010): Provided plain-error review for unpreserved, non-structural sentencing errors and reiterated procedural requirements (calculation, consideration, explanation).
  • United States v. Provance, 944 F.3d 213 (4th Cir. 2019): Required sequencing—procedural reasonableness first, then substantive reasonableness.
  • United States v. Nance, 957 F.3d 204 (4th Cir. 2020): Supplied the “totality of the circumstances” lens for substantive reasonableness.
  • United States v. Gillespie, 27 F.4th 934 (4th Cir. 2022) and United States v. Bennett, 986 F.3d 389 (4th Cir. 2021): Established the presumption of reasonableness for within- (or below-) Guidelines sentences and the requirement to rebut it with § 3553(a)-based unreasonableness.

How precedent drove the outcome: The panel identified no procedural error and, given the within-Guidelines nature of the sentence, applied the presumption of substantive reasonableness (United States v. Gillespie)—which Glover did not overcome.

5. The Anders framework and counsel’s obligations

  • Anders v. California, 386 U.S. 738 (1967): The governing procedure when counsel believes an appeal is frivolous but must still identify potential issues and assist the court’s independent review.
  • Penson v. Ohio, 488 U.S. 75 (1988): Cited for the “dual purposes” of an Anders brief—confirming counsel’s adequate review and enabling the court to evaluate potential appellate merit.

Practice point: The court’s admonition signals that even where affirmance is likely, Anders briefs must meaningfully engage both the record and the governing law, not merely list issues.

B. Legal Reasoning

  1. Procedural default as dispositive: The suppression issue turned entirely on preservation. By applying Wright v. Collins, Thomas v. Arn, and United States v. Midgette, the panel treated the failure to object as a forfeiture of the right to appellate review, avoiding a merits determination.
  2. Instructional error requires both entitlement and prejudice: The court accepted the general correctness of the “government-agent instruction” concept but treated it as fact-dependent under United States v. Lewis. Because the conspiracy proof extended beyond controlled buys, and because the court’s charge framed the conspiracy as involving Glover and his coconspirators, the panel found no meaningful risk of an agent-only conspiracy conviction and thus no reversible error.
  3. Voir dire remarks: immediate remedial action and lack of prejudice: The district court’s prompt dismissal of the prospective juror limited exposure; the remark did not opine on guilt or show knowledge of the case; defense counsel sought no additional voir dire; and standard “decide on the evidence” instructions were treated as curative.
  4. Sentencing: deferential review plus Guidelines presumption: Absent procedural error, and with a within-Guidelines sentence, the panel applied the presumption of reasonableness and affirmed.

C. Impact

  • Preservation doctrine remains outcome-determinative: The opinion underscores that suppression litigation can be won or lost on post-hearing procedure—failure to object to a magistrate judge’s recommendation may end the issue on appeal regardless of underlying Fourth Amendment arguments.
  • Government-agent conspiracy instruction is not automatic: The panel’s contrast with United States v. Lewis suggests trial courts have latitude to omit the instruction when the evidentiary record clearly shows non-agent conspiratorial agreements and the overall charge anchors the conspiracy to identified coconspirators.
  • Voir dire prejudice claims face a high bar without contemporaneous requests: The decision highlights the strategic importance of making a record—requesting additional questioning or curative steps during voir dire—before later seeking Rule 33 relief.
  • Anders quality control: The court’s express reminder may influence future counsel behavior in the circuit, signaling scrutiny of Anders submissions even in unpublished, routine affirmances.
  • Limitations: The decision is unpublished and “not binding precedent,” but it remains informative regarding how the Fourth Circuit applies preservation rules, instructional prejudice analysis, and Rule 33 discretion in practice.

IV. Complex Concepts Simplified

Anders brief
A filing by appointed counsel stating that, after reviewing the record, counsel sees no non-frivolous appellate issues—while still identifying potential issues so the court can conduct its own review.
Objections to a magistrate judge’s recommendation (28 U.S.C. § 636(b)(1))
When a magistrate judge recommends how to rule, parties must file timely, specific objections. If they do not—after being warned—appellate courts commonly treat the issues as forfeited.
“Government-agent” conspiracy instruction
A jury instruction explaining that a defendant cannot be convicted of conspiracy based only on an “agreement” with a Government agent or informant who is acting for the Government, because conspiracy requires an agreement between two or more genuine criminal participants.
Rule 33 “interest of justice” new trial
A post-verdict remedy used sparingly; denial is reviewed deferentially and reversed only in exceptional circumstances.
Procedural vs. substantive reasonableness (sentencing)
Procedural reasonableness concerns the process (Guidelines calculation, § 3553(a) consideration, explanation). Substantive reasonableness concerns whether the length of the sentence is reasonable in light of the statutory factors and the case’s circumstances.
Within-Guidelines presumption
If the sentence falls within the properly calculated advisory Guidelines range, appellate courts generally presume it is reasonable; the defendant must show it is unreasonable under § 3553(a).

V. Conclusion

United States v. William Glover affirms serious drug-trafficking convictions and a lengthy within-Guidelines sentence while delivering several practical lessons: (1) failure to file specific objections to a magistrate judge’s suppression recommendation forfeits appellate review; (2) a “government-agent” conspiracy instruction is chiefly required where the evidentiary mix creates a substantial risk the jury might convict based on agent-only interactions, as in United States v. Lewis; (3) isolated voir dire remarks about drug harms, promptly addressed by dismissal and accompanied by standard impartiality instructions, ordinarily will not justify a new trial absent a concrete showing of prejudice; and (4) Anders briefing must be substantively useful to the court, even when counsel believes the appeal lacks merit.