Story highlights "It was embarrassing, degrading," Charnesia Corley tells CNN

She says a deputy pulled her pants down and put her fingers inside her

The sheriff's office says internal affairs is investigating the incident

(CNN) A woman says a sheriff's deputy in Texas stripped her naked in a gas station parking lot and administered a cavity search of her genitals because of suspicions she was in possession of marijuana.

"It was embarrassing, degrading," Charnesia Corley told CNN's Don Lemon on Thursday. "I felt low, I felt helpless."

The incident happened during a traffic stop in June in Harris County. A male sheriff's deputy pulled Corley over and then searched her car after saying he smelled marijuana in it, she said.

After finding nothing, she said, he called a female officer out to search Corley.

"They took me around to the side of my car, and she tells me, 'Pull your pants down,'" Corley told CNN.

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