McKINNEY, TX — (CNN) Dueling narratives are emerging about whether race played a role in a Texas officer’s handling of black teenagers at a pool party. But who’s offering those narratives may be surprising.

A black resident says race didn’t play a role. A white resident says it did.

A crowd of protesters marched Monday night, outraged over a seven-minute video posted to YouTube that showed a chaotic scene at a neighborhood pool in McKinney, a Dallas suburb. The footage shows Officer Eric Casebolt cursing at several black teenagers, yanking a 14-year-old bikini-clad girl to the ground and kneeling on her back.

Casebolt also unholsters his gun and chases teenage boys as they approach him while he tries to control the girl.

Brandon Brooks, the 15-year-old white teen who shot the video, said there’s no doubt race was a factor. He said the officer was targeting black teens at the scene.

“I was one of the only white people in the area when that was happening,” he told CNN affiliate KDAF. “You can see in part of the video where he tells us to sit down, and he kinda like skips over me and tells all my African-American friends to go sit down.”

Brandon said the argument that drew police to the pool party didn’t even involve most of the teens Casebolt was going after.

“It was a fight between a mom and girl, which had nothing to do with all the other kids,” he told KDAF.

Brandon said he was unnerved to see his friend tackled and pressed to the ground.

“I think she was ‘running her mouth,’ and she has freedom of speech, and that was very uncalled for him to throw her to the ground,” he said.

Dajerria Becton told CNN affiliate KDFW that she obeyed Casebolt’s order to leave when he grabbed her.

“He told me to keep walking,” she said. “And I kept walking and then I’m guessing he thought we were saying rude stuff to him.

“He grabbed me, twisted my arm on my back and shoved me in the grass and started pulling the back of my braids,” Dajerria told KDFW. “I was telling him to get off me because my back was hurting bad.”

In the video, the officer places her hands behind her back and he keeps her down on the ground.

Dajerria wasn’t charged, McKinney police said. She was released to her parents.

Another girl who was there said she was frozen with fear when she saw Casebolt take out his gun.

“When he pulled that out, that’s the only reason I did not run away,” the girl, 13, told CNN on Tuesday.

Her father, Jahi Bakari, said he hopes to get his daughter counseling later. When she came home, she was initially afraid to even tell her parents what had happened, he said. He was “mortified” to hear her describe what she saw, he added.

He said he sees only a racist cop when he watches the YouTube video.

“We will not accept the fact that a grown man, an adult officer, will handle a female like that,” he said.

Benet Embry, a 43-year-old black resident, saw things differently.

Embry has lived at Craig Ranch, a planned community in McKinney, for eight years. He said it’s a nice place. Racially diverse. People get along there.

He said when he was at the community pool Friday, a crowd of teenagers showed up, even though Craig Ranch’s strict homeowners’ association rules prohibit bringing more than two guests to the pool.

The teens huddled by the gate and shouted to let them in. Some jumped over the fence, Embry said. A security guard tried to get them to leave but was outnumbered, so the guard called police.

“Let me reiterate, the neighbors or the neighborhood did not call the police because this was an African-American party or whatever the situation is,” he said. “This was not a racially motivated event — at all. This whole thing is being blown completely out of proportion.”

Embry did say he was disturbed to see the officer kneel on top of the bikini-clad girl and wave his gun at other teens.

“I may or may not agree with everything that the police officer did, but I do believe he was trying to establish order,” he said.

Casebolt is on administrative leave as police investigate what happened.

McKinney Mayor Brian Loughmiller said city officials are reaching out to the community.

“I have received messages of support for our police officers, generally, and messages of concern for the actions of one officer in particular from the incident,” he said. “We appreciate your support and we share your concerns.”

Police Chief Greg Conley told reporters that several callers described fighting at the pool.

Police union officials said that teens and adults were trespassing at the privately owned pool, and that there were reports of vandalism and fighting in the area when officers responded.

“The McKinney (Fraternal Order of Police) assures that this was not a racially motivated incident,” the union said, “and can say without a shadow of doubt that all members of the McKinney FOP and McKinney (Police Department) do not conduct racially biased policing.”

But Brandon, the white teen who shot the video, doesn’t buy it.

“They’re just going to discriminate against them because they’re black,” he said. “What if that was your kid getting slung to the ground? Would you still be talking about them in the way that you are?”

The-CNN-Wire ™ & © 2015 Cable News Network, Inc., a Time Warner Company. All rights reserved. (PHOTO: Brandon Brooks via Youtube)