It happened on the North Freeway just south of the Tidwell exit. Police say Stephanie Irene Santana, who is seven months pregnant, drove to a tattoo parlor to get a piercing and told the tattoo artist she wanted to know how long it would take, because her baby was waiting in the car.
Employees told police they could tell the woman was drunk and kicked her out of the store.
One employee followed her out and saw the 1-year-old in the passenger seat. He says the woman passed out with the front door of the car wide open.
"I knew she was stumbling. I knew she was on something," said tattoo business employee 'Yogi.' "I don't assume nothing, and that's why I turned her down."
When police arrived, they found beer bottles inside the diaper bag. They also discovered Xanax. The child was not injured.
Santana faces multiple charges, including child endangerment, DWI and possession of a controlled substance.