Prosecutors said they have 13 material witnesses, and they are in federal custody.
Bradley was charged Monday with transporting immigrants who were in the US illegally, resulting in 10 deaths - a charge that carries the possibility of the death penalty.
Ten immigrants who were on the trailer found Sunday in a Walmart parking lot have died.
Homeland Security is also looking into whether or not the the Zetas drug cartel was involved. "You have to look at potential targets and potential related locations, both north and south", he said. The complaint goes on to say Bradley opened the door of the trailer and was "run over by "Spanish" people and knocked to the ground".
Thirteen people who rode in the trailer remained hospitalized Tuesday in San Antonio, said ICE spokesman Greg Palmore. He declined to say how many were critical or in life-threatening condition.
Accounts from three separate survivors indicate groups of immigrants were loaded into the trailer, and one unnamed undocumented migrant guessed there were up to 200 people in the trailer.
Umnia Bank dévoile la liste de ses services
Les modèles de conventions de compte et des contrats Murabaha ont été ratifiés papar le Comité Charia de la Finance Participative. "Umnia Bank vient d'annoncer le démarrage effectif de son activité et ce à travers les régions du Royaume".
He expects authorities to hold them at one of the immigrant detention facilities in the San Antonio area. He said the trailer was already full of people, but it was so dark he couldn't tell how many. Bradley had diabetes that he hadn't properly treated, she said, and had to have a series of amputations, most recently the removal of his leg this spring.
Jacob Monty, an immigration lawyer in Houston, said the help survivors give to authorities could "lead to permanent residency".
Bradley, the driver of the truck found in San Antonio, remained jailed Tuesday.
We've also learned Bradley's commercial drivers license issued in Florida has been revoked since April.
He has also been cited repeatedly over the years for violating federal motor carrier safety regulations in Iowa dating back to 1995. At least two of the tickets were for logging more hours than allowed. He was going to leave Pyle Transportation, the Iowa-based trucking company he worked for, this month after getting a prosthetic. He told the news organization he had sold the trailer used in the smuggling operation to someone in Mexico and hired a former company driver, Bradley, as an independent contractor to take the trailer to a drop-off point Brownsville, Texas.
Of the 34 Mexicans, 31 are men, one is a woman and the two others are identified as minors.
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