The suspect, 19-year-old Isaac Adams, faces an intoxication manslaughter charge.
Adams is accused of crashing into the Star Food Mart on Tuesday, pinning a woman under the suspect's pickup truck.
The woman pinned, 24-year-old Sylvia Marie Zazueta, was taken to a local hospital, where she later died. Six others were also transported to local hospitals.
Marion Crain, 33, was also inside the store during the crash. She's 7 months pregnant.
Crain's attorney, Mark Anderson, says she came to Fort Worth from Vernon a few days ago to be with her fiancé, Jeremy Guess.
"She's having abdominal pain and they're doing all the testing, sonograms and bloodwork to make sure the baby's OK," said Anderson.
Guess says he and Crain live in a homeless shelter, and they were in the convenience store buying food for the evening when the crash happened.
"Next thing I know, she's flying at me and I catch her and we ended up in the kitchen area," said Guess.
Guess took photos from the scene, showing debris from the crash. A board from the debris has been turned into a small memorial.
Police say that before the deadly convenience store crash, Adams was in a minor accident with another car and raced away from the scene. It put him on a collision course with the Star Food Mart and the people working and shopping inside.
His bond has been set at $100,000. Police are awaiting toxicology test results.
Zazueta's family members gathered Wednesday night at a vigil to remember the mother of three. Her grandfather says it will take some time, but eventually, he'll forgive the suspect.