Human Smuggler Drives Truck Loaded with Migrants into Rio Grande Human Smuggler Drives Truck Loaded with Migrants into Rio Grande A smuggler drove his pickup truck loaded with migrants into the Rio Grande following a pursuit in South Texas. Rio Grande Valley Sector Border Patrol agents apprehended five migrants as they swam to the U.S. riverbank from the sinking truck. The driver fled to Mexico. McAllen Station Border Patrol agents received information about suspected illegal activity near Mission, Texas, on Friday afternoon, according to information provided by Rio Grande Valley Sector Border Patrol officials. As the agents approached they observed multiple suspected illegal immigrants attempting to load into two vehicles.