At least five undocumented immigrants are dead and several others hurt as an SUV carrying more than a dozen people crashed while fleeing from Border Patrol agents in South Texas.
The sheriff said he didn't know where the immigrants were from but said most migrants who travel through the area are from Central America or Mexico.
This article be updated as more details become available. "It's a problem. This is, I think, a flawless example of why our borders need to be secure".
The crash happened in Dimmit County, Texas about 120 miles southwest of San Antonio.
Boyd said the driver was known to police, and had been seen in the area "last week", either scouting the area or looking for immigrants to smuggle.
He said there were 14 people in the vehicle.
The passenger, also believed to be a US citizen, is now in custody.
5 immigrants killed in rollover crash in Dimmit, Texas. The Trump administration has said tougher immigration policies - even separating children from their parents - are needed to deter immigrants from coming to the country illegally. But along with that, there needs to be cameras. Several people were ejected from the vehicle during the crash.
Boyd said the driver of the Suburban was also injured and was flown to a San Antonio hospital.
Yolanda Choates, a US Customs and Border Protection spokeswoman, directed questions to the Dimmit County Sheriff's Office.