The following excerpt is from United States v. Lincoln, 494 F.2d 833 (9th Cir. 1974):
We have held that a temporary detention of a vehicle may be made by border agents beyond the scope of a border search, when based on a "founded suspicion", which may be less than probable cause. United States v. Bugarin-Casas, 484 F.2d 853 (9th Cir. 1973); United States v. Barron, 472 F.2d 1215 (9th Cir. 1972); United States v. Roberts, 470 F.2d 858 (9th Cir. 1972).
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