Police in the US state of Georgia say a sheriff's deputy has been fired after video emerged showing him pinning a black man to the floor and punching him in the face.
Roderick Walker, 26, was a passenger in a car that was pulled over by deputies for an alleged broken rear light.
After an altercation, police tried to arrest him.
Video shared on social media showed Mr Walker being held down by two white deputies, one of whom punches him.
In a statement, Clayton County Sheriff's Office said "the deputy who repeatedly struck Roderick Walker" was to lose his job "for excessive use of force".
A criminal investigation has been turned over to the district attorney's office, the statement added.
The incident, which happened on Friday near the Hartsfield-Jackson Atlanta International Airport, comes amid heightened tensions in the US over racism and police brutality.
Mr Walker's lawyer, Shean Williams, said his client had been a passenger in the lift-share car with his girlfriend, their five-month-old child and his stepson when police pulled them over.
Georgia deputy fired for excessive force after video shows him striking Black man.— Shomari Stone (@shomaristone) September 14, 2020
A lawyer for Roderick Walker said he was a passenger in a car that had been pulled over for having a broken tail light.
(By Tim Stelloh and Nicole Acevedo: @NBCNews)https://t.co/Fo9BULcpGI pic.twitter.com/kCYyXuxA9L
Mr Walker became upset when he was asked for his identification as he hadn't been driving the car, Mr Williams said in a statement quoted by ABC News.
"He informed them that he did not have any ID and that he didn't need any since he was not driving a vehicle," he said.
"When they didn't like his question, they then demanded that he get out of a vehicle that he wasn't driving. It escalates to him being beaten on the ground, being tased, and almost dying. And they take him to jail."
In footage of the arrest, a child in the car yells "Daddy" and Mr Walker's girlfriend screams. One of the deputies says Mr Walker bit him.
Mr Williams said that his client lost consciousness at least twice during the arrest and denied biting the deputy.
A photograph of Mr Walker taken later in custody shows him with a swollen left eye.
This is Roderick Walker.— Kristen Clarke (@KristenClarkeJD) September 14, 2020
He is 26 yrs old and was brutally assaulted by a Clayton Cty, GA deputy sheriff in front of his girlfriend and a young child. Walker was a passenger in a car stopped for a broken tail-light and dared to ask why HE needed to produce ID. #BlackLivesMatter pic.twitter.com/YqFNlZ1csh
"My reaction to the video is that it just shows, unfortunately, another incident where an African American male's civil rights have been violated by people and officers and law enforcement who have the duty first to protect and serve," Mr Williams said.
Mr Walker is charged with two counts of obstructing officers and two counts of battery, ABC News reported.
His family and his lawyers are pressing to have him released from jail.
In recent months the US has been grappling with the treatment of African-Americans at the hands of the police, as well as wider questions about racism in society.
Debates were triggered by the death in police custody in Minneapolis of another black man, George Floyd, in May.
His death sparked protests around the country, and abroad, and has ignited calls for police reform in the US.
More recently, the shooting of Jacob Blake, 29, in Wisconsin led to further violent protests.