Trooper Gabriel Llanas confirmed Monday that all the victims were from the George West area. Both Castillo and Tanguma were parents.
Trooper Llanas said the accident is still under investigation.
“As of yet, we are still measuring skid marks to determine speed,” he said.
The investigation will include talking to the driver and family members as well. Llanas said the investigation could take a week or more.
The wreck took place on Saturday, Aug. 27, at approximately 4:30 p.m.
After talking to witnesses, Trooper Jason Galvan learned that a Chevy Tahoe was traveling southbound on Highway 281 toward George West in the far outside lane. The vehicle switched lanes to pass an 18-wheeler when it “made an averted movement” and lost control. The vehicle fishtailed and, according to Galvan, rolled approximately three times before coming to a stop upright in the middle median.
The two female passengers in the rear seats were ejected from the vehicle and killed. One of the women died instantly and one died while receiving treatment at the accident scene.
The driver was transported to the hospital while another passenger died at the scene. Trooper Llanas said he was briefly able to speak with Castillo before he was transported to the hospital and Castillo told him that the passenger reached for something on the dashboard and accidentally hit the steering wheel in doing so.
The two front-seat passengers were wearing seat belts while the rear-seat passengers were not, according to the DPS.
Galvan said that the driver of the 18-wheeler and the car following behind the Tahoe both stopped to yield aid and assist officers in any way they could.
The wreck was worked by DPS troopers as well as George West officers, Live Oak County deputies and Three Rivers officers.