449 U.S. 411 449 U.S. 411 101 S.Ct. 690 66 L.Ed.2d 621 UNITED STATES, Petitioner,v.Jesus E. CORTEZ and Pedro Hernandez-Loera. No. 79-404. Argued Dec. 1, 1980. Decided Jan. 21, 1981. Syllabus Based on their discovery of sets of distinctive human footprints in the desert, Border Patrol officers deduced that on a number of occasions groups […]