83 F.4th 1
1st Cir.2023Background
- On June 5, 2018 agents executed a warrant at Pérez‑Greaux's Arecibo home and found ~3 kg cocaine in a safe, packaging materials and shipping-related items, and a .9mm Glock (wrapped in bags) with magazines and loose ammunition on a closet shelf in an adjacent bedroom.
- A firearms expert testified the Glock had been altered with an external automatic sear and functioned as a machinegun (confirmed by test‑firing). Agents also recovered firearm periodicals, an extended/30‑round magazine, cash, and multiple cellphones with images suggesting drug‑shipment activity.
- Pérez‑Greaux gave inconsistent statements about the gun's origin (initially saying he was holding it for a supplier "Alex," later saying he did not know it was fully automatic).
- Indicted for (inter alia) possession with intent to distribute (21 U.S.C. § 841) and two § 924(c) counts: possession of a firearm in furtherance of drug trafficking and possession of a machinegun in furtherance of drug trafficking (the latter carries a 30‑year mandatory minimum).
- At trial the district court refused to instruct the jury that the government must prove the defendant knew the weapon had machinegun characteristics; the jury convicted on all counts. On appeal the First Circuit affirmed the § 924(c) conviction for possession of a firearm in furtherance of drug trafficking, but held the jury should have been instructed on knowledge of machinegun characteristics, vacated the machinegun § 924(c) conviction, and remanded that count for a new trial.
Issues
| Issue | Plaintiff's Argument (Government) | Defendant's Argument (Pérez‑Greaux) | Held |
|---|---|---|---|
| Whether § 924(c)(1)(B)(ii) requires proof the defendant knew the firearm had machinegun characteristics | §924(c) text is silent on mens rea for that characteristic; prior circuit precedent and statutory structure permit treating it without a separate knowledge element | Presumption of scienter applies; for a 30‑year enhancement Congress must have required knowledge of the weapon's characteristics | The court held the government must prove beyond a reasonable doubt that defendant knew the firearm had machinegun characteristics; instructional error required vacatur and retrial on that count |
| Whether evidence was sufficient that the firearm was possessed "in furtherance of" drug trafficking (§ 924(c)(1)(A)) | Objectively sufficient: gun found in same residence as drugs, easily reachable, magazines/ammo present, defendant led agents to the gun, and statements tying him to trafficking and to receipt of the gun with drugs | Mere proximity is insufficient; gun was wrapped/packed and in separate room, so no nexus to trafficking | Affirmed: considering proximity, accessibility, surrounding circumstances, and defendant's statements, a rational jury could find the firearm was possessed in furtherance of drug trafficking |
| Whether evidence was sufficient that defendant knew the firearm was a machinegun (mens rea for vacated count) | Circumstantial proof sufficed: visible alterations per expert, extended magazine/30‑round mag, defendant handled/possessed the gun and read firearm periodicals, and statements suggesting he received the gun from a close associate | Government produced no direct lay evidence that a non‑expert would have known the gun was automatic; insufficient proof of knowledge | Denial of acquittal affirmed: cumulative circumstantial evidence could permit a rational jury to find knowledge beyond a reasonable doubt |
| Whether other trial errors (evidentiary rulings, prosecutorial remarks, denial of Franks hearing) warrant a new trial | Rulings were within district court discretion; challenged remarks were reasonable inferences; Franks showing was inadequate | Rulings and remarks prejudiced trial; affidavit contained a falsehood warranting a Franks hearing | Court rejected these claims (no abuse of discretion or plain error) and found defendant failed to make the substantial preliminary showing needed for a Franks hearing; cumulative‑error claim not persuasive given disposition |
Key Cases Cited
- Morissette v. United States, 342 U.S. 246 (1952) (mens rea is presumption in criminal law; omission of intent should not be read as eliminating scienter)
- Staples v. United States, 511 U.S. 600 (1994) (presumption of scienter applies to firearm‑machinegun statutes; knowledge of automatic capability required for harsh penalties)
- United States v. O'Brien, 560 U.S. 218 (2010) (machinegun character is an element of § 924(c) offense; did not decide whether knowledge of characteristics is required)
- Dean v. United States, 556 U.S. 568 (2009) (distinguishes elements from sentencing factors for mens rea analysis)
- Rehaif v. United States, 139 S. Ct. 2191 (2019) (presumption in favor of scienter applies even where statutory text is silent)
- Flores‑Figueroa v. United States, 556 U.S. 646 (2009) (requires proof of knowledge regarding identification element despite presence of predicate offense)
- United States v. Torres‑Pérez, 22 F.4th 28 (1st Cir. 2021) (circumstantial evidence and visible alteration can support knowledge that a Glock was altered to fire automatically)
- United States v. Nieves‑Castaño, 480 F.3d 597 (1st Cir. 2007) (reversal where evidence insufficient to prove defendant knew rifle had machinegun characteristics)
- United States v. Laureano‑Pérez, 797 F.3d 45 (1st Cir. 2015) (assumed shared mens rea requirement for § 924(c) machinegun provision and § 922(o); sufficiency of knowledge evidence upheld)
- Burwell v. United States, 690 F.3d 500 (D.C. Cir. 2012) (en banc) (post‑O'Brien circuit decision holding no separate mens rea requirement; discussed in opinion but distinguished by First Circuit)