The jury in the murder case against ex-Minneapolis policeman Derek Chauvin over the death of George Floyd has retired to deliberate its verdict.
Jurors were told by the prosecution that Chauvin had killed Mr Floyd, while the defence said the former police officer had correctly followed his training.
Twelve jurors - made up of six white people and six back or multiracial people - retired to begin deliberations as Minneapolis braced for another round of unrest no matter the verdict.
The court is being protected by armed soldiers from the National Guard, barbed wire and high barriers.
After the three-week trial’s closing arguments, Judge Peter Cahill rejected a defence request for a mistrial based partly on comments by California representative Maxine Waters that protesters could get more confrontational in the absence of a guilty verdict.
The judge told Chauvin's lawyer: "I wish elected officials would stop talking about this case, especially in a manner that is disrespectful to the rule of law and to the judicial branch."
Jury told ‘use your common sense’
During closing arguments on Monday, prosecutors said Chauvin squeezed the life out of Mr Floyd by pinning his knee against his neck last May, ignoring bystanders, his own training and common sense.
The defence argued that the now-fired white officer acted reasonably and the 46-year-old black man died of an underlying heart condition and illegal drug use.
Chauvin "had to know" he was squeezing the life out of Mr Floyd as he cried over and over that he could not breathe and finally fell silent, a prosecutor told the jury during closing arguments.
"Use your common sense. Believe your eyes. What you saw, you saw," Steve Schleicher said, referring to the video of Mr Floyd pinned to the pavement with Chauvin's knee on or close to his neck last May for up to nine minutes, 29 seconds, as bystanders yelled at the white officer to get off.
Chauvin lawyer Eric Nelson countered by arguing that Chauvin did what any "reasonable" police officer would have done after finding himself in a "dynamic" and "fluid" situation involving a large man struggling with three police officers.
He said Chauvin’s body camera and badge were knocked off his chest due to the “intensity of the struggle”.
Mr Nelson also argued that Chauvin was unlikely to have intentionally violated use-of-force rules as he would have known that the incident was being recorded.
The defence contends not only that Chauvin acted reasonably but that 46-year-old Mr Floyd died of heart disease and illegal drug use, not Chauvin's actions.
Prosecution took nearly two hours to make case
Prosecutor Jerry Blackwell had the final word, offering the state's rebuttal argument. The prosecutor, who is black, said questions about the use of force and cause of death are "so simple that a child can understand it".
"In fact, a child did understand it, when the nine-year-old girl said, 'Get off of him'," Mr Blackwell said, referring to a young witness who objected to what she saw. "That's how simple it was. 'Get off of him'. Common sense."
Under the law, police are given certain latitude to use force and their actions are supposed to be judged according to what a "reasonable officer" in the same situation would have done - a point the defence stressed repeatedly.
The prosecution took about an hour and 45 minutes to make its case, with Mr Schleicher saying at the conclusion: "This wasn't policing. This was murder."
Chauvin, 45, is charged with second-degree murder, third-degree murder and second-degree manslaughter.
All three charges require the jury to conclude that Chauvin's actions were a "substantial causal factor" in Mr Floyd's death and that his use of force was unreasonable.
Second-degree intentional murder carries up to 40 years in prison, third-degree murder 25 years, and second-degree manslaughter 10 years.