A jury will hear whether the deadly arrest of George Floyd, which ignited a global protest movement 10 months ago, amounts to murder as opening arguments commence in the trial of former Minneapolis policeman Derek Chauvin.
Over two weeks of jury selection, many jurors told Hennepin County District Judge Peter Cahill they recognised the scrutiny their deliberations would come under, not least by those who view the trial as a reckoning for how black people are policed in the United States.
"It's been a long time coming," a gospel choir sang on Sunday evening at a prayer service attended by Floyd's relatives. "But I know a change is gonna come".
The service was held in a church a few blocks east of where Chauvin, who was white, was caught on a bystander's video with his knee on the neck of Floyd, a 46-year-old black man.
Chauvin, 45, has pleaded not guilty to second-degree murder, third-degree murder and second-degree manslaughter, with his lawyers arguing he followed his training and the main cause of Floyd's death, which the county examiner ruled a homicide, was a drug overdose.
He faces up to 40 years in prison if convicted on the most serious charge.
Jurors will head to a courtroom from Monday local time in a tower in downtown Minneapolis ringed with concrete barriers, barbed wire and soldiers from the state's National Guard.
For blocks around, businesses are closed and windows boarded up, fearing a repeat of the arson and other property damage that occurred after Floyd's death.
Less than five kilometres away, residents maintain a vigil at the intersection where Chauvin kept his knee on a handcuffed Floyd's neck for about nine minutes as Floyd used his final breaths to plead for his life.
Chauvin and three other officers were arresting Floyd on suspicion of passing a fake $US20 bill at the Cup Foods grocery store nearby.
Four sets of barricades block police from coming to the intersection, now called George Floyd Square, which is filled with flowers, posters, murals and other tributes to Floyd.
The jury, including three alternates, is made up of six white women, three white men, three black men, one black woman and two multiracial women, according to court records.
"I'm thankful that it is a diverse jury," Paris Stevens, a cousin of Floyd who works as a nurse in North Carolina, said.
"I'm very anxious because you don't know what's going to happen, but I'm just glad that this process is starting."
Legal experts have noted that US police officers have almost never been found criminally liable for killing a citizen.
Chauvin's lawyers have said they will try to convince the jury that fentanyl, an opioid painkiller, found in Floyd's blood by the medical examiner played a bigger role in his death than the officer's restraint.