United States v. Benjamin-Hernandez, 49 F.4th 580

Background

Appellants Edilio Benjamin-Hernandez and Johanni Balbuena-Hernandez were indicted (2015) and detained pretrial for roughly 33 months; superseding indictments added co‑defendants in 2016.
The defendants filed extensive pretrial motions (over 40); they moved to dismiss for Speedy Trial Act and Sixth Amendment violations, which the district court denied.
The joint four‑day trial produced convictions for conspiracy to possess with intent to distribute ≥5 kg cocaine and aiding and abetting importation of ≥5 kg cocaine; Benjamin also convicted of improper noncitizen entry and Balbuena of unlawful reentry (unchallenged on appeal).
Key government evidence: defendants found near an abandoned yawl in Vega Baja (wet, sandy, agitated), a statement to a DEA agent referencing "the stuff," testimony from a cooperating co‑conspirator about drug transfers, telephone recordings, and agent overview testimony.
On appeal the defendants challenged: (1) denial of dismissal under the Speedy Trial Act, (2) Sixth Amendment speedy‑trial violation, (3) sufficiency of the evidence, and (4) two evidentiary rulings (telephone‑recording authentication and agent opinion/overview testimony). The First Circuit affirmed.

Issues

Issue	Plaintiff's Argument (United States)	Defendant's Argument	Held
Speedy Trial Act dismissal	Tolling permitted because second superseding indictment added later co‑defendants; clock did not run from defendants' 2015 appearances	Clock began at defendants' Nov 23, 2015 appearances; many days were not excludable and dismissal required	Affirmed denial: review limited to timeframe raised below; second superseding indictment tolled the clock until triggering events in Feb 2017; many appellate challenges waived for failure to preserve/plain‑error showing
Sixth Amendment speedy‑trial claim	Delay attributable to case complexity, many pretrial motions, Hurricane Maria, and counsel unavailability; no government bad faith	~33‑month pretrial detention was presumptively prejudicial, impaired defense, caused anxiety and hardship	Affirmed denial: delay was concerning but government reasons weighed against violation; defendants failed to show particularized prejudice or bad faith
Sufficiency of the evidence	Circumstantial and testimonial evidence (presence, statement referencing "the stuff," cooperating witness testimony) suffice to prove knowledge, agreement, and aiding importation	Mere presence; no evidence of planning, knowing possession, or participation	Balbuena: conviction supported (evidence sufficient). Benjamin: sufficiency challenge waived for lack of developed argument
Evidentiary rulings (recordings/authentication; agent overview/opinion)	Recordings were properly admitted/authenticated and agent testimony permissible; any marginal error harmless given trial record	Recordings unauthenticated; agent offered improper opinion/overview testimony bolstering cooperating witness	Benjamin waived authentication claim by failing to preserve/plain‑error argument; any error in overview testimony was harmless given overwhelming evidence; convictions stand

Key Cases Cited

United States v. Gates, 709 F.3d 58 (1st Cir. 2013) (explains STA exclusions and review)
United States v. Casas, 425 F.3d 23 (1st Cir. 2005) (co‑defendant joinder tolls STA clock until last defendant's triggering event)
Henderson v. United States, 476 U.S. 321 (1986) (interpretation of §3161(h) tolling by joinder)
United States v. Lara, 970 F.3d 68 (1st Cir. 2020) (framework for Sixth Amendment speedy‑trial analysis)
Doggett v. United States, 505 U.S. 647 (1992) (presumptively prejudicial delay requires extreme lengths for automatic relief)
RaShad v. Walsh, 300 F.3d 27 (1st Cir. 2002) (presumption of prejudice not automatic; defendant must show specific impairment)
United States v. Maldonado‑Peña, 4 F.4th 1 (1st Cir. 2021) (careful balancing where extended pretrial detention occurred)
United States v. Meises, 645 F.3d 5 (1st Cir. 2011) (single witness testimony can suffice for conviction)