Around 7 p.m., a 2012 Hyundai Sonata driven by U.S. citizen Thomas Firmin, 19, approached the checkpoint located between Westmorland and Salton City.
A canine detection team alerted to the vehicle, and it was referred to secondary inspection where agents found a 38-year-old Mexican national hidden in the truck.
The man showed signs of heat-related injuries, and agents immediately contacted emergency medical technicians who transported the man to Pioneer’s Memorial Hospital.
The man was later released and transported for processing.
Firmin was taken into custody.