The Supreme Court holds that absent reasonable suspicion, police extension of a traffic stop in order to conduct a dog sniff is unconstitutional . . . (Taken from the syllabus prepared by the Reporter of Decisions) DENNYS RODRIGUEZ v. UNITED STATES, No. 13–9972 Argued January 21, 2015 Decided April 21, 2015 GINSBURG, J., delivered the opinion of the Court, in which ROBERTS, C. J., and SCALIA, BREYER, SOTOMAYOR, and KAGAN, JJ., joined. KENNEDY, J., filed a dissenting opinion. THOMAS, J., filed a dissenting opinion, in which ALITO, J., joined, and in which KENNEDY, J., joined as to all but Part III. ALITO, J., filed a dissenting opinion. Officer Struble, a K–9 officer, stopped petitioner Rodriguez for driving on a highway shoulder, a violation of Nebraska law. After Struble attended to everything relating to the stop, including, inter alia, checking the driver’s licenses of Rodriguez and his passenger and issuing a warning for the traffic offense, he asked Rodriguez for permission to walk his dog around the vehicle. When Rodriguez refused, Struble detained him until a second officer arrived. Struble then retrieved his dog, who alerted to the presence of drugs in the vehicle. The ensuing search revealed methamphetamine. Seven or eight minutes elapsed from the time Struble issued the written warning until the dog alerted. Rodriguez was indicted on federal drug charges. He moved to suppress the evidence seized from the vehicle on the ground, among others, that Struble had prolonged the traffic stop without reasonable suspicion in order to conduct the dog sniff. The Magistrate Judge recommended denial of the motion. He found no reasonable suspicion supporting detention once Struble issued the written warning. Under Eighth Circuit precedent, however, he concluded that prolonging the stop by “seven to eight minutes” for the dog sniff was only a de minimis intrusion on Rodriguez’s Fourth Amendment rights and was for that reason permissible. The District Court then denied the motion to suppress. Rodriguez entered a conditional guilty plea and was sentenced to five years in prison. The Eighth Circuit affirmed. Noting that the seven or eight minute delay was an acceptable “de minimis intrusion on Rodriguez’s personal liberty,” the court declined to reach the question whether Struble had reasonable suspicion to continue Rodriguez’s detention after issuing the written warning. Held: Absent reasonable suspicion, police extension of a traffic stop in order to conduct a dog sniff violates the Constitution’s shield against unreasonable seizures. 1. A routine traffic stop is more like a brief stop under Terry v. Ohio, 392 U. S. 1, than an arrest, see, e.g., Arizona v. Johnson, 555 U. S. 323, 330. Its tolerable duration is determined by the seizure’s “mission,” which is to address the traffic violation that warranted the stop, Illinois v. Caballes, 543 U. S. 405, 407 and attend to related safety concerns. Authority for the seizure ends when tasks tied to the traffic infraction are—or reasonably should have been—completed. The Fourth Amendment may tolerate certain unrelated investigations that do not lengthen the roadside detention, Johnson, 555 U. S., at 327–328 (questioning); Caballes, 543 U. S., at 406, 408 (dog sniff), but a traffic stop “become[s] unlawful if it is prolonged beyond the time reasonably required to complete th[e] mission” of issuing a warning ticket, id., at 407. Beyond determining whether to issue a traffic ticket, an officer’s mission during a traffic stop typically includes checking the driver’s license, determining whether there are outstanding warrants against the driver, and inspecting the automobile’s registration and proof of insurance. These checks serve the same objective as enforcement of the traffic code: ensuring that vehicles on the road are operated safely and responsibly. See Delaware v. Prouse, 440 U. S. 648, 658–659. Lacking the same close connection to roadway safety as the ordinary inquiries, a dog sniff is not fairly characterized as part of the officer’s traffic mission. In concluding that the de minimis intrusion here could be offset by the Government’s interest in stopping the flow of illegal drugs, the Eighth Circuit relied on Pennsylvania v. Mimms, 434 U. S. 106. The Court reasoned in Mimms that the government’s “legitimate and weighty” interest in officer safety outweighed the “de minimis” additional intrusion of requiring a driver, lawfully stopped, to exit a vehicle, id., at 110–111. The officer-safety interest recognized in Mimms, however, stemmed from the danger to the officer associated with the traffic stop itself. On-scene investigation into other crimes, in contrast, detours from the officer’s traffic-control mission and therefore gains no support from Mimms. The Government’s argument that an officer who completes all traffic-related tasks expeditiously should earn extra time to pursue an unrelated criminal investigation is unpersuasive, for a traffic stop “prolonged beyond” the time in fact needed for the officer to complete his traffic-based inquiries is “unlawful,” Caballes, 543 U. S., at 407. The critical question is not whether the dog sniff occurs before or after the officer issues a ticket, but whether conducting the sniff adds time to the stop. Pp. 5–8. 2. The determination adopted by the District Court that detention for the dog sniff was not independently supported by individualized suspicion was not reviewed by the Eighth Circuit. That question therefore remains open for consideration on remand. P. 9. 741 F. 3d 905, vacated and remanded.