ORLANDO, Fla. -- Witnesses are shocked and a mother is outraged. Eyewitness News obtained a home video that shows an Orlando police officer shove a 15-year-old boy at a local park.

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SLIDESHOW: Images From Home Video Of Incident
POLL: Does Video Show Officer Use Excessive Force?

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Tuesday, the teen's mother started filing a formal complaint with the Orlando Police Department, saying the officer had no right to lay his hands on her son. A neighbor happened to see the confrontation and videotaped it.

Tuesday, Eyewitness News asked officers to watch the tape and they have a much different explanation.

The teen was sitting on a fence when the officer shoved him off. The Orlando Police Department said it's too early to know if the officer used excessive force, but the teen's mom said her son was targeted and the officer needs to be punished.

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A neighbor was videotaping when the Orlando police officer shoved 15-year-old Kenneth Hawthorne on Sunday afternoon.

"When he pushed me, he pushed me with force, with anger, like he was really mad," Hawthorne told Eyewitness News.

He said officers were looking for a suspect who ran into the park and the officers got angry when he wouldn't tell them which way the suspect ran. On video, after shoving Hawthorne, Officer Bryan Fischer returns to his police cruiser and takes his gloves off. Hawthorne said the officer wanted to fight and threatened to shoot him with a stun gun.

"He called me a ni**er. He said, 'Ni**er, I will squash you like a grape,'" Hawthorne said.

Officer Fischer realized he was being taped and talked to the camera.

"I know you are rolling and I have not done anything wrong," he yelled to the man with the camera.

Eyewitness News showed the tape to the Orlando Police Department on Tuesday afternoon.

"It may have been about protecting himself from any further aggression towards the officer," said Barb Jones, Orlando Police Department.

According to the police report, officers had been to the park several times, this time to find Hawthorne's father, who was wanted for trespassing. Police said Hawthorne used the 'F' word and told Officer Fischer he would beat him up and that Fischer pushed Hawthorne only after Hawthorne stood up from the wooden post and tried to get in his face.

However, close inspection of the video shows that the teen doesn't get up from the wooden post until he is pushed.

Hawthorne's mom said the officer should know better.

"I am not going to stop until somebody can step in and take action against him," said Letitia Montgomery, the teen's mother.

Once Hawthorne's mom files her official complaint against Officer Fischer, Internal Affairs will start investigating. As far as punishment, the first time an officer uses excessive force, they get a verbal reprimand. The second time, they get a written notice. The third time, they are suspended.

The Orlando Police Department said there were eight complaints of excessive force filed against officers in the last year.

Bryan Fischer, the officer involved in the incident, has been with the department since November 2005. He has had no previous complaints of excessive force filed against him.