Brandon Martinez, 16, was one of nearly 40 undocumented immigrants found on a blistering summer day inside an unventilated trailer parked at a San Antonio Wal-Mart. Ten died, and Brandon barely survived.
Federal officials who interviewed some of the survivors say that the human cargo was assembled and loaded into the truck in the border city of Laredo.
Some had paid smugglers to take them across the Rio Grande in rafts. One immigrant said there were as many as 200 people in the back of the truck.