Rodriguez v. United States
Citation and Court
575 U.S. 348 (2015) — Supreme Court of the United States
Facts
A police officer stopped Rodriguez for briefly driving on a highway shoulder. After completing all tasks related to the traffic stop — writing a warning ticket, returning documents — the officer extended the stop by seven to eight minutes to await a drug-sniffing dog. The dog alerted and methamphetamine was found.
Issue
Whether police may extend an otherwise completed traffic stop, absent reasonable suspicion, to conduct a dog sniff.
Holding
No; the Constitution requires that a traffic stop end once its mission is complete. Extending the stop even briefly to conduct a dog sniff without reasonable suspicion violates the Fourth Amendment.
Rule / Doctrine
A traffic stop is a seizure limited in scope and duration to the purpose that justified it. Officers may not extend a completed stop — even momentarily — for investigation unrelated to the original purpose unless they develop independent reasonable suspicion. Authority for a seizure terminates when its justification has run its course. Illinois v. Caballes (dog sniff during a lawful stop is not a search) does not authorize prolonging the stop to conduct that sniff.
Significance
Reinforced that the duration of a lawful seizure is strictly cabined to its justifying purpose. Any extension — even a de minimis one — must be independently supported. Practically limits officers’ ability to use traffic stops as a pretext for drug investigations.