A New York City police officer is under investigation after getting caught on a cellphone video knocking a woman to the ground.

The police officer was arresting an attempted murder suspect, and the man's girlfriend assaulted him, resulting in the officer turning on the woman and hitting her.

The event occurred in Harlem on West 136th Street before 5 p.m. on September 1. The woman, identified as Tamani Crum, 19, saw her boyfriend Elvin James handcuffed and surrounded by police officers in the street.

She reportedly rushed to the scene, where she got told to back off by the officers.

The police officer, identified as Kendo Kinsey, initially sent her back a few feet. However, when she slapped his hand away and moved toward him again, he had enough and knocked her to the ground.

The blow landed on her face or head and she fell back on the sidewalk.

Crum stayed down with her head clutching her face until two officers picked her up and placed her in handcuffs.

A witness could be heard calling, "You're wilding, bro!" to Crum as "a little girl."

According to The Daily News, Crum was charged with assault on an officer, obstructing governmental administration, and resisting arrest.

The video was uploaded to Twitter by former NBA player Etan Thomas. He stated that he thought the police officer "has ZERO business being a police officer & should be fired immediately."

The overall opinions, however, are divided about the actions that happened during the confrontation.

Mayor Eric Adams, who was questioned about the incident, blamed Crum for her actions.

"The young lady came and smacked a police officer. The police officer responded," Adams said. "They did what the system called for. They didn't turn off their body cameras. That is why we have footage of what happened."

The NYPD also stated that the officer's actions were justified. According to reports, an angry crowd had gathered during Elvin James's arrest, and the officers were assaulted more than once.

During the interaction with the angry onlookers, an officer suffered a minor head injury, and a 26-year-old woman was given a summons for spitting at them.

The 22-year-old murder suspect was found carrying a loaded gun and drugs at the time of his arrest. The police released videos from the officers' body-worn cameras to clarify what happened on Thursday.

Many of the residents and viewers of the videos, however, disagree with the treatment of Crum, meaning that the officer used excessive force against the young woman.