"We've seen this many, many times, in not only this county but other counties along the border".
The driver is now in custody with Homeland Security Investigations, a division of the Department of Homeland Security, according to the Texas Department of Public Safety.
He added: "This is a flawless example of why our borders need to be secure".
In all, 14 people were inside the SUV, including the driver and passenger, according to the sheriff. The driver, believed to be a United States citizen, was rushed to a hospital; the passenger, also believed to be a US citizen, now is in custody.
Boyd said his officers have dealt with the driver before, adding he was scouting the area earlier to try and pick up immigrants.
The pursuit took place in Big Wells, about 130 miles southwest of San Antonio.
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We don't want to come away from here with nothing, we've worked too hard for that and try and raise the bar next weekend". In situations they are trying to solve problems themselves rather than trusting team mates and the system.
The other 12 passengers were undocumented immigrants, Boyd said.
Dimmit County officials confirmed Sunday afternoon that five people have died in a crash involving undocumented immigrants.
"The vehicle was traveling around 100 miles an hour", Boyd said. "There needs to be sensors".
Border Patrol agents attempted to stop the vehicle when the chase ensued and were soon joined by Dimmit County deputies, KFDM reported.
Yolanda Choates, a US Customs and Border Protection spokeswoman, directed questions to the Dimmit County Sheriff's Office.