The wreck happened in the 1500 block of College Avenue, east of the Gulf Freeway.
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Authorities said 23-year-old Taylor Phillips was driving an SUV with her mother and her 1-year-old son inside when Erick Hernandez crossed three lanes of traffic in his pickup truck and slammed into her head-on.
Hernandez appeared in court Wednesday on an intoxication manslaughter charge.
According to court records, Hernandez told police he was drinking at a bar with his cousin before the crash.
On Wednesday, prosecutors say a video from inside the South Houston bar shows Hernandez consuming 12 drinks, including three shots of tequila, before getting into his truck.
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During the six hours Hernandez was inside the bar no one asked him for an ID, according to prosecutors.
The employees and owner could face a charge for serving to a minor and serving someone while they're intoxicated.
Investigators tell our sister station ABC13 that the bar already has six TABC violations this year that include selling to minors.
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More charges will be filed if prosecutors can determine who was serving him.
The district attorney's office is also considering action to try to shut down the business.
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