Federal law allows certain federal agents to conduct search and seizures within 100 miles (160 km) of the border into the interior of the United States.[5] The Supreme Court has clearly and repeatedly confirmed that the border search exception applies within 100 miles (160 km) of the border of the United States
https://en.m.wikipedia.org/wiki/Border_search_exception
Federal law allows certain federal agents to conduct search and seizures within 100 miles (160 km) of the border into the interior of the United States.[5] The Supreme Court has clearly and repeatedly confirmed that the border search exception applies within 100 miles (160 km) of the border of the United States