A Wisconsin prosecutor says he will not file criminal charges against a white police officer who shot a black man in the back in Kenosha, leaving him paralysed and setting off protests.
Officer Rusten Sheskey's shooting of Jacob Blake last August, captured on bystander video, turned the nation's spotlight on Wisconsin during a summer marked by protests over police brutality and racism.
More than 250 people were arrested in the days that followed, including 17-year-old Kyle Rittenhouse, a self-styled medic with an assault rifle charged in the fatal shootings of two men and the wounding of a third.
Kenosha County District Attorney Michael Graveley said on Tuesday he "would have to disprove the clear expression of these officers that they had to fire a weapon to defend themselves".
He added: "I do not believe the state ... would be able to prove that the privilege of self-defence is not available."
Mr Graveley said he had informed Mr Blake of the news before announcing the decision.
The Blake shooting happened three months after George Floyd died while being restrained by police officers in Minneapolis, his death also captured on video which sparked outrage and protests that spread across the United States and beyond.
The galvanised Black Lives Matter movement put a spotlight on inequitable policing and became a fault line in politics, with President Donald Trump criticising protesters and aggressively pressing a law-and-order message that he sought to capitalise on in Wisconsin and other swing states.
Kenosha, a city of 100,000 on the Wisconsin-Illinois border about 100 km north of Chicago, was braced for renewed protests ahead of the charges, with concrete barricades and metal fencing surrounded the Kenosha County Courthouse and plywood protecting many businesses.
The Common Council on Monday night unanimously approved an emergency resolution giving the mayor the power to impose curfews and Governor Tony Evers activated 500 National Guard troops to assist.
Mr Sheskey was among officers responding to a woman who had reported her boyfriend was not supposed to be around.
Phone video shows Mr Blake walking to the driver-side door of a car as officers follow him with guns drawn, shouting.
As Mr Blake opens the door and leans into the car, Mr Sheskey grabs his shirt from behind and opens fire.
The Kenosha police union said Mr Blake was armed with a knife and Mr Sheskey ordered him several times to drop it but he would not.