By Andrea Lucia

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DALLAS (CBSDFW.COM) – University Park Police have issued a warrant for Brittany Giles, 26,  accusing her of holding a knife to a 7-year-old boy’s throat.

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The boy’s mother, Emily Smith, says she stopped at the Snider Plaza Shell station January 29 to fill up when her path crossed with Giles.

She was sitting in the car with her children, when she heard the pump click and got out to return the nozzle.

“The gas station attendant started yelling, ‘Hey! Hey!’ ” Smith remembers. “Then I hear someone scream, ‘You’re getting robbed!’ ”

Smith spotted her 4-year-old daughter safe in the back seat, and ran to the passenger seat where she’d left 7 year old son had been playing with the radio.

“The only thing I saw was him shaking,” she says. “All he could say was ‘Knife. Knife. Knife at my throat. I’m sorry mommy. I’m so sorry. She took your purse. I didn’t know what else to do.’ ”

Smith says the woman had opened the passenger door and ordered her son to hand over her purse.

He sat perfectly still, though, prompting her to lean across him to grab it herself.

When the woman heard the attendant’s screams, she turned, pushing the knife against the boy’s throat.

“That’s when he said the knife started going in. He had a tiny little indention. Not cut, not physically harmed, but just a tiny little indention in his precious 7 year old neck,” says Smith.

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Police say Giles is a criminal known for changing her name and appearance.

Surveillance cameras show her at Northpark mall, where police say she charged more than $13,000 to Smith’s stolen credit card.

Smith says she never even saw Giles.

“When I turned around all I saw was a door slam, and that was it. Just so fast,” she says.

It isn’t the money Smith cares about, but her family.

“My daughter kept asking, ‘Why was she trying to cut off his head?’ ” she remembers. “All we want to do as adults is to protect our kids. And when that’s taken away from you, that’s so disturbing.”

Police have arrested the suspected get away driver, Tiffany James, but Smith wants to see Giles put away too.

“I want her to be behind bars. I want her to be held accountable for her actions. So it would give our entire family some peace of mind.”

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