Indian from Pine Ridge would be subject to a Nebraska protection order. Sergeant Ten Fingers therefore 'called James Dag-gett, the sheriff of Shannon County, South Dakota, to advise him that he might be holding a. non-Indian. At the .time, the sheriff was at home in Hermosa, South Dakota, approximately eighty miles from the Pine Ridge Reservation. Sheriff Dag-gett asked Sergeant Ten Fingers to hold Mr. Terry overnight until he could pick him up the next morning. It was not unusual for Sheriff Daggett to- ask the tribal police to hold a suspect for up to eight hours because, at the time, he had only one patrol car and a single part-time deputy.
When Mr. Terry arrived at the Pine Ridge tribal jail, Bureau of Indian Affairs Special Agent Fred Bennett, without giving a Miranda warning, asked .him if he had been previously convicted of domestic violence. (Agent Bennett had already reviewed a printout that listed the defendant’s prior charges but omitted the dispositions for some of them.) Mr. Terry responded affirmatively and stated that the domestic violence conviction was in 1999. Although Mr. Terry seemed eager to talk, Agent Bennett refused to continue the conversation because the defendant appeared intoxicated. The following day, Agent Bennett interviewed Mr. Terry at the Pine Ridge tribal jail. Mr. Terry was informed of and chose to waive his Miranda rights and spoke with Agent Bennett about the previous night’s events. Sheriff Daggett took custody of Mr. Terry later that day.
II.
When reviewing a' denial of a motion to suppress, we examine the factual findings underlying the district court’s conclusion for clear error and review de novo the ultimate question of whether the fourth amendment has been violated. United States v. White, 356 F.3d 865, 868 (8th Cir.2004). The fourth amendment protects “[t]he right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures.” U.S. Const, amend. IV. “The touchstone of the Fourth Amendment is reasonableness.” Florida v. Jimeno, 500 U.S. 248, 250, 111 S.Ct. 1801, 114 L.Ed.2d 297 (1991).
-Mr. Terry contends first that the tribal officers were not reasonable in believing that they had authority to seize him in the manner that they did. Mr. Terry correctly asserts that he is not subject to the criminal jurisdiction of the Oglala Tribe because he is not an Indian. See Oliphant v. Suquamish Indian Tribe, 435 U.S. 191, 195, 212, 98 S.Ct. 1011, 55 L.Ed.2d 209 (1978). But tribal police officers do not lack authority to detain non-Indians whose conduct disturbs the public order on their reservation.
The Supreme Court has recognized that tribal law enforcement authorities possess “traditional and undisputed power to exclude persons whom they deem to be undesirable from tribal lands,” and therefore have “the power to restrain those who disturb public order on the reservation, and if necessary to eject them.” Duro v. Reina, 495 U.S. 676, 696-97, 110 S.Ct. 2053, 109 L.Ed.2d 693 (1990). “Where jurisdiction to try and punish an offender rests outside the tribe, tribal officers may exercise their power to detain the offender and transport him to the proper authorities.” Id. at 697, 110 S.Ct. 2053; see also Strate v. A-1 Contractors, 520 U.S. 438, 456 n. 11, 117 S.Ct. 1404, 137 L.Ed.2d 661 (1997). Because the power of tribal authorities to exclude non-Indian law violators from the reservation would be meaningless if tribal police were not empowered to investigate such violations, tribal police