SAN ANTONIO (AP) - The tractor-trailer was pitch-black inside, crammed with maybe 90 immigrants or more, and already hot when it left the Texas border town of Laredo for the 150-mile trip north to San Antonio.
It wasn't long before the passengers, sweating profusely in the rising oven-like heat, started crying and pleading for water. Children whimpered. People took turns breathing through a single hole in the wall. They pounded on the sides of the truck and yelled to try to get the driver's attention. Then they began passing out.
By the time the driver stopped at a Walmart in San Antonio on Saturday night and opened the door, as many as eight passengers were dead and two more would soon die in an immigrant-smuggling attempt gone tragically awry.
The details of the journey were recounted Monday by a survivor who spoke to the Associated Press and in a federal criminal complaint against the driver, James Matthew Bradley, who could face the death penalty over the 10 lives lost.
"After an hour I heard people crying and asking for water. I, too, was sweating and people were despairing. That's when I lost consciousness," 27-year-old Adan Lalravega told the AP from his hospital bed.
Bradley, 60, of Clearwater, Florida, appeared in federal court on charges of illegally transporting immigrants for financial gain, resulting in death. He was ordered held for another hearing on Thursday.
He did not enter a plea or say anything about what happened. But in court papers, he told authorities he didn't realize anyone was inside his 18-wheeler until he parked and got out to relieve himself.
In addition to the dead, nearly 20 others rescued from the rig were hospitalized in dire condition, many suffering from extreme dehydration and heatstroke.
A number of those aboard were from Mexico and Guatemala. Many of the immigrants had hired smugglers who brought them across the U.S. border, hid them in safe houses and then put them aboard the tractor-trailer for the ride northward, according to accounts given to investigators.
"Even though they have the driver in custody, I can guarantee you there's going to be many more people we're looking for to prosecute," said Thomas Homan, acting director of U.S. Immigration and Customs Enforcement.
Bradley told investigators the trailer had been sold, and he was transporting it for his boss from Iowa to Brownsville, Texas. After hearing banging and shaking, he opened the door and was "surprised when he was run over by 'Spanish' people and knocked to the ground," according to the criminal complaint.
He said he did not call 911, even though he knew at least one passenger was dead.
Bradley told authorities he knew the trailer refrigeration system didn't work and the four ventilation holes were probably clogged.
The truck was registered to Pyle Transportation Inc. of Schaller, Iowa. President Brian Pyle said he had sold the truck to someone in Mexico and Bradley was supposed to deliver it to a pick-up point in Brownsville.
"I'm absolutely sorry it happened. I really am. It's shocking. I'm sorry my name was on it," Pyle said, referring to the truck. He said he had no idea why Bradley took the roundabout route he described to investigators.
Bradley told authorities he had stopped in Laredo - which would have been out of his way if he were traveling directly to Brownsville - to get the truck washed and detailed before heading back 150 miles north to San Antonio. From there, he would have had to drive 275 miles south again to get to Brownsville.
One passenger described a perilous journey that began in Mexico, telling investigators he and others crossed into the U.S. by raft, paying smugglers about $700, an amount that also bought protection offered by the Zeta drug cartel.
They then walked until the next day and rode in a pickup truck to Laredo, where they were put aboard the tractor-trailer to be taken to San Antonio, according to the complaint. The passenger said he was supposed to pay the smugglers $5,500 once he got there.
Another passenger told authorities he was in a group of 24 people who had been in a "stash house" in Laredo for 11 days before being taken to the tractor-trailer.