Eight immigrants were found dead inside the closed trailer just after midnight Saturday. More than two dozen others, the only ones left of the estimated 100 who started the trip, were taken to area hospitals, many in serious to critical condition due to the heat.

An initial report that two more people had died was the result of hospital error, according to Homeland Security, who asserted that a ninth person died Sunday afternoon.

The U.S. Attorney's Office stated on Monday morning that a 10th person died following the incident.
All the victims so far are adult males, officials said.

The driver of the vehicle, 60-year-old James M. Bradley Jr. of Florida, was booked into a federal jail in San Antonio on Sunday morning for his alleged role in what U.S. Attorney Richard Durbin called "an alien smuggling venture gone horribly wrong."