United States v. Leonard Bernard, 927 F.3d 799

Early morning traffic stop: Officer Willis stopped Leonard Bernard for erratic driving on I-40; Willis asked for license/registration and requested a pat-down; Bernard consented and sat uncuffed in the patrol vehicle.
While checking for warrants, Willis chatted with Bernard (~5–7 minutes); Bernard gave explanations about travel and motorcycle repairs that Willis found suspicious.
After returning documents and issuing a warning, Willis asked to ask more questions; Bernard agreed, denied drugs twice, then consented in writing to a vehicle search and disclosed a rifle in the car.
Officers found a loaded handgun, an unloaded rifle, and mason jars containing about three pounds of marijuana on the roof cargo rack; Bernard was arrested; officers did not read Miranda warnings.
During transport, Willis told Bernard there "may be some people up there that might want to talk to him" and suggested he "help himself out;" Bernard then made incriminating statements about growing and selling the marijuana.
District court denied Bernard’s suppression motion (consent to search valid; stop and detention lawful; post-arrest transport remark not interrogation). Fourth Circuit affirmed: stop and consent upheld; transport remark was interrogation requiring Miranda but error was harmless because physical evidence was overwhelming.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Lawfulness of traffic stop (Fourth Amendment)	Stop lacked basis; no traffic infraction	Willis observed erratic driving, giving probable cause	Stop lawful; officer credibility supported observation of erratic driving
Length and scope of detention	Stop was unreasonably prolonged; defendant coerced to stay	Duration was reasonable to check warrants; further questioning followed consent	Detention length reasonable; continued encounter based on consent
Validity/scope of consent to search vehicle cargo	Consent did not cover cargo on top of Jeep	Bernard gave verbal and signed written consent and disclosed weapon on top	Consent valid and included top cargo; search lawful
Whether transport remark was interrogation triggering Miranda (Fifth Amendment)	Willis’s remark functionally elicited incriminating statements; Miranda required	Government: remark was not coercive interrogation; friendly rapport negated coercive effect	Remark was the functional equivalent of interrogation; Miranda required, but failure to warn was harmless error given overwhelming physical evidence

Miranda v. Arizona, 384 U.S. 436 (1966) (requirement to advise custodial suspects of rights before interrogation)
Rhode Island v. Innis, 446 U.S. 291 (1980) (Miranda covers express questioning and its functional equivalent — words or actions reasonably likely to elicit incriminating response)
Whren v. United States, 517 U.S. 806 (1996) (traffic stop is a seizure; officer’s subjective intentions generally irrelevant if probable cause exists)
Terry v. Ohio, 392 U.S. 1 (1968) (permitting brief investigatory stops based on reasonable suspicion)
Arizona v. Johnson, 555 U.S. 323 (2009) (officer may detain vehicle occupants during lawful traffic stop for investigatory purposes)