United States v. Christopher Montalvo Flores, 81 F.4th 339

Police executed an arrest warrant at a New Jersey hotel for Christopher Montalvo‑Flores; officers recovered car keys on his person and found a locked rental car outside the hotel.
The rental vehicle was registered to Enterprise; the renter was Montalvo‑Flores’s girlfriend, Jennifer Pisciotta.
Officers told an Enterprise manager that the person operating the vehicle was arrested and unlicensed; Enterprise consented to a search of the car.
The search yielded 304 grams of cocaine and $35 in the console; Montalvo‑Flores was charged with possession with intent to distribute.
At the suppression hearing Detective Holmes testified (largely recounting other officers’ observations) that Pisciotta handed the car/keys to Montalvo‑Flores and that he possessed/operated the car; the District Court found he was only shown to possess keys and denied suppression.
The Third Circuit majority (Ambro) held the District Court clearly erred in finding no possession/control and concluded Montalvo‑Flores had a reasonable expectation of privacy; the case was vacated and remanded. Judge Hardiman dissented, arguing the District Court’s credibility findings were not clearly erroneous and Montalvo‑Flores failed his burden to prove permission to use the car.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Standing: Did Montalvo‑Flores have a reasonable expectation of privacy in the girlfriend’s rental car?	He had keys, was observed given the car by Pisciotta, and possessed/operated it with her permission (invoking Byrd).	He was not the lessee/owner, not listed on the rental agreement, and the District Court found only key possession (no observed control).	Majority: unrebutted testimony shows possession/control with lessee’s permission → reasonable expectation of privacy; suppression denial vacated and remanded.
Effect of lacking a driver’s license on expectation of privacy	Lack of license does not negate a reasonable expectation when defendant lawfully possessed/controlled a parked car.	District Court suggested being unlicensed would defeat standing.	Majority: rejects the driver’s‑license rule as dispositive here; declines to resolve the broader circuit split.
Validity of the warrantless search (Enterprise consent)	If Montalvo‑Flores has standing, the Government must justify the warrantless search.	Government contends Enterprise (registered renter) gave consent to search.	Not decided by the Third Circuit; remanded for the District Court to address whether the search was lawful.

Byrd v. United States, 138 S. Ct. 1518 (2018) (lawful possession/control of a rental car can support a reasonable expectation of privacy even if not listed on rental agreement)
Rakas v. Illinois, 439 U.S. 128 (1978) (standing requires a legitimate expectation of privacy in the invaded place)
Katz v. United States, 389 U.S. 347 (1967) (subjective and objective prongs of the Fourth Amendment expectation‑of‑privacy test)
United States v. Matlock, 415 U.S. 164 (1974) (consent and admissibility of hearsay at suppression hearings)
United States v. Baker, 221 F.3d 438 (3d Cir. 2000) (ownership not required; inquiry focuses on strength of defendant’s interest and control)
United States v. Cortez‑Dutrieville, 743 F.3d 881 (3d Cir. 2014) (standing is a fact‑bound inquiry requiring proof of both subjective and objectively reasonable expectation)