An unarmed black man died in New York state after he was hooded by police and held face down to the road for two minutes, body camera footage shows.
Daniel Prude, 41, was suffering from mental health issues when police restrained him in March and put a “spit hood” on his head, designed to protect officers from a detainee’s saliva.
He later died of asphyxiation but his story has only now been made public.
His death was two months before the killing of George Floyd.
Mr Floyd died in May after a white policeman knelt on his neck for nearly eight minutes in Minnesota. Global anti-racism protests were held in the wake of his killing.
Tensions have risen again in the US in recent weeks after black man Jacob Blake was shot seven times in the back and paralysed during an arrest in Kenosha, Wisconsin, on 23 August, sparking large protests in the city that have turned violent.
Democratic presidential nominee Joe Biden has called for charges against police involved in Mr Blake’s shooting and that of Breonna Taylor, an African-American woman who was shot eight times by police who entered her apartment in Louisville, Kentucky on 13 March.
“I think we should let the judicial system work its way,” he told a news conference in Delaware. “I do think at a minimum, they need to be charged, the officers.”
Protesters gathered in the city of Rochester, New York, on Wednesday to condemn Mr Prude’s death. Several people were briefly taken into custody after entering the Public Safety Building, which serves as police headquarters, local media reports say.
US Attorney General William Barr on Wednesday dismissed accusations that black and white Americans were treated differently due to police racism.
In an interview with CNN, he said it was very rare for an unarmed black person to be shot by white officers.
“I think the narrative that the police are in some epidemic of shooting unarmed black men is simply a false narrative,” he said.
How did Daniel Prude die?
In a news conference on Wednesday, Mr Prude’s brother, Joe, said he called police in Rochester, New York, on 23 March as his sibling was suffering from acute mental health problems.
“I placed a phone call for my brother to get help, not for my brother to get lynched,” he said.
A warehouse worker from Chicago and father of five, Daniel Prude was visiting his brother at the time of his death.
Police body camera footage obtained by the family through a public records request shows Mr Prude, who had been running naked through the streets in a light snow before police arrived, lying unarmed as officers restrain him on the ground.
The video shows that Mr Prude complied immediately when officers arrived on the scene and ordered him to lie on the ground and put his hands behind his back. He can be heard saying: “Sure thing, sure thing.”
He becomes agitated, at times swearing at the officers who surround him and spitting, but he does not appear to offer any physical resistance, according to the footage.
Mr Prude told officers he was infected with coronavirus, and they placed a “spit hood” over his head. “Spit hoods” are mesh fabric hoods placed over the heads of suspects to prevent spitting or biting.
Critics who oppose their use say they are distressing and humiliating, can cause panic in the detained person, and make it harder to notice if a prisoner is having difficulty breathing.
One officer is seen pressing down with both hands on Mr Prude’s head and saying: “Stop spitting.”