A witness said she felt traumatized after experiencing a deadly predawn shooting on a Dallas immigration office Wednesday , where one person was killed and two others were critically wounded, according to authorities.

Denises Robleto was at the U.S. Immigration and Customs Enforcement (ICE) facility, located just southwest of Dallas Love Field Airport, to bring her mother to an early morning appointment and captured those moments on her phone.

About 8 seconds into the video, a woman in the back seat of the car can be heard saying in Spanish that the shots are close, then you hear them.

Robleto, 38, said she was waiting outside in her car when the gunfire broke out.

"In those moments, I didn't think of my kids," she said. "I thought of my mom, who was inside, and I didn't know where t

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