United States v. Ernest Dyer, 54 F.4th 155

Victim (girlfriend) reported to local and federal agents that Ernest Dyer assaulted her with a handgun, trafficked women, and sold drugs from the Queen Street residence.
Detective Baker obtained a warrant to search Dyer’s home for firearms, illegal drugs, and cell phones; officers executed that warrant, found a firearm and a box on a shelf in Dyer’s son’s bedroom containing green pills, drug packing material, and an ID (the “Box”).
ATF obtained a second warrant after a trafficking victim interview; that search recovered bath salts in a pill bottle, scales with cocaine residue, and drug packaging from the garage and residence.
A grand jury charged Dyer with felon-in-possession (18 U.S.C. § 922(g)); a superseding indictment added § 924(c) and drug counts. Dyer moved to suppress evidence from both searches.
The District Court: partially granted suppression (excluded some drug evidence from the first search) but held the Box admissible under the plain-view doctrine and denied suppression of second-search evidence.
Dyer pleaded guilty conditionally (reserving the right to appeal the suppression ruling). On appeal he challenged only the Box seizure; the Third Circuit affirmed, finding any error harmless under Rule 11.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Validity of seizure under plain view/protective sweep	Dyer: record lacks specifics (appearance, location on shelf, whether box was opened or manipulated) so plain-view/protective-sweep justification fails	Government: officers had warrant to search for firearms and cell phones; the Box could conceal a phone and was thus in an area searchable under the warrant	District Court’s protective-sweep finding unsupported on record; but appellate court found the Box could plausibly be searched because it could conceal items covered by the warrant — appellate decision ultimately rests on harmlessness rather than definitively resolving plain-view theory
Materiality of the Box to plea withdrawal under Rule 11(a)(2)	Dyer: if Box wrongly admitted, he “prevailed” and may withdraw conditional plea	Government: apply harmless-error test (Lustig approach); if Box was immaterial to plea decision, denial of suppression is harmless and plea stands	Box was immaterial to the felon-in-possession charge and to Dyer’s decision to plead; any error was harmless beyond a reasonable doubt, so Dyer may not withdraw his plea

Horton v. California, 496 U.S. 128 (U.S. 1990) (plain-view doctrine principles)
United States v. Menon, 24 F.3d 550 (3d Cir. 1994) (elements for plain-view seizure)
United States v. Ross, 456 U.S. 798 (U.S. 1982) (containers in vehicle searches; scope of search for items described in warrant)
Maryland v. Buie, 494 U.S. 325 (U.S. 1990) (scope of protective sweep incident to arrest)
United States v. Lustig, 830 F.3d 1075 (9th Cir. 2016) (applying harmless-error analysis to Rule 11(a)(2) suppression challenges)
United States v. Benard, 680 F.3d 1206 (10th Cir. 2012) (discussing challenges of assessing harmlessness in plea context)
United States v. Leake, 95 F.3d 409 (6th Cir. 1996) (conditional plea withdrawal where suppressed evidence would have been material)
United States v. Dominguez Benitez, 542 U.S. 74 (U.S. 2004) (harmless-error standard in guilty-plea proceedings)