Authorities have detained the guy accused of driving the car found in Texas with dozens of victims.
In San Antonio, police caught Homero Zamorano dressed as a migrant in a thicket alongside a truck and detained him.
The catastrophe claimed the lives of 53 individuals, many of them suffering from heatstroke and dehydration.
After being locked in a vehicle in sweltering conditions for hours without any water.
US history’s worst human trafficking tragedy has taken place here.
When authorities identified Mr. Zamorano, the accused driver from Texas.
He “tried to pass himself off as one of the survivors,” according to a senior Mexican immigration official.

Christian Martinez, a second suspect, was taken into custody on suspicion of conspiring with the first.
A check of Mr. Zamorano’s phone turned up his whereabouts, according to federal prosecutors.
The two individuals may face a maximum term of life in prison, or perhaps the death penalty.
If convicted, according to the US Justice Department.
There were two other arrests for firearms offenses tied to the truck’s registered address.
On Monday evening, emergency personnel found 46 dead corpses inside and around an abandoned truck that had its doors ripped open on a lonely road near San Antonio.
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It was only when a neighboring worker heard pleas for aid that rescuers discovered the vehicle, which had no survivors.
Only around a dozen of those recovered inside the truck seemed to be breathing, according to official radio broadcasts from the site.
After many people hospitalized died, the death toll climbed to 53.
Local Texans gathered on Wednesday to pay their respects at a monument erected at the scene of the tragedy, around 250 kilometers (160 miles) north of the US-Mexico border.
Veronica Vazquez told the AFP news agency, “All of this tears my heart since I have relatives who have gone through the same thing.”
Roberto Alvarez, another local who came to the United States illegally as a laborer, brought flowers and candles to honor the deaths.
To paraphrase him, “You put yourself in their shoes because you too went through it.”
Earlier, authorities said that the vehicle was devoid of water and air conditioning.
This may explain why people left bottles of water at the scene.
More than half of those killed, 27, were Mexican nationals. El Salvador and Honduras.
Each lost two persons, while Mexico reported the deaths of another 14 people.
On Wednesday also, Guatemalan authorities confirmed that two 13- and 14-year-old boys were among the victims of the disaster.
The cousins Pascual Melvin Guachiac and Juan Wilmer Tulul reportedly deserted their family two weeks ago to avoid poverty.
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