WATCH: Texas cop drags a handcuffed teen girl across a school counter for 'mouthing off'

A police officer forcefully arrested 16-year-old Tiffany Rodriguez at Por Vida Charter High School on Wednesday, according to San Antonio's Fox 29.

The San Antonio Police Department said the incident first happened because Rodriguez was cussing and raising her voice.

The cop was called to the school to remove a lady from the office. Rodriguez said the lady only spoke Spanish and believed the officer was treating her unfairly.

“Yeah, I was mouthing off, but I was mouthing off to help the lady out like translating Spanish, because he didn’t know Spanish,” said Rodriguez.

It was at this point the officer, who has not been identified, allegedly used excessive force on the young girl.

“He slammed me against the door and I have a bump right here to show it," Rodriguez said. "And when he had me against the door, I told him to stop like to let me go he grabbed my arm and he twisted it."

Casandra Ortiz, Rodriguez's friend, was also in the office at the time and said she couldn't believe what went down.

“I knew her for so long it hurt me to see her getting thrown around everywhere,” Ortiz said.

Ortiz’s mother, Jessica Villarreal, recorded the video and reported the incident.

“You can’t drag around a child like that, I don’t care how mad they get you, you’re an adult you don’t grab a child like that,” she said.

The San Antonio Police Department said they are conducting an investigation. The police officer was wearing a body camera, but the footage has not been made public.

Watch the altercation below.