In the state's closing argument, a prosecutor said Chauvin kneeled on Floyd's neck and back for 9 minutes and 29 seconds because of his pride and his ego in the face of concerned bystanders.

"He was not going to let these bystanders tell him what to do. He was going to do what he wanted, how he wanted, for as long as he wanted. And there was nothing, nothing they can do about it because he had the authority.

He had the power, and the other officers, the bystanders were powerless," prosecuting attorney Steve Schleicher said. "He was trying to win, and George Floyd paid for it with his life."

The comments about Chauvin's pride and ego were the first time prosecutors have specifically discussed Chauvin's mindset when Floyd died on May 25, 2020 -- elements that are key to the charges of second-degree unintentional murder, third-degree murder and second-degree manslaughter against him.

In response, defense attorney Eric Nelson said Chauvin acted as a "reasonable officer" would in that situation and said there was no evidence he intentionally or purposefully used force that was unlawful.

"You have to look at it from the reasonable police officer standard. You have to take into account that officers are human beings, capable of making mistakes in highly stressful situations," Nelson said.

"In this case, the totality of the circumstances that were known to a reasonable police officer in the precise moment the force was used demonstrates that this was an authorized use of force, as unattractive as it may be. This is reasonable doubt."

Prosecuting attorney Jerry Blackwell then delivered a rebuttal rejecting the defense's claim that Floyd died because of an enlarged heart.

"The reason George Floyd is dead is because Mr. Chauvin's heart is too small," he said.

Judge Peter Cahill instructed jurors on the law before and after closing arguments, and sent them off outside the courtroom just after 5 p.m. ET. The jury will remain sequestered for deliberations and will stay in a hotel at night.

During the trial, prosecutors called 38 witnesses to testify, including police use-of-force experts who criticized Chauvin and medical experts who explained how Floyd died.

The defense called seven witnesses of its own -- but not Chauvin himself, as he invoked his Fifth Amendment right not to testify.

Chauvin, 45, has pleaded not guilty to all three charges. If convicted, he could face up to 40 years in prison for second-degree murder, up to 25 years for third-degree murder, and up to 10 years for second-degree manslaughter.

The charges are to be considered separate, so Chauvin could be convicted of all, some or none of them.

The end of the trial comes 11 months after Floyd's death on a Minneapolis street set off widespread protests about how police treat Black people.

No matter this trial's verdict, the broader issue shows no signs of lessening. Last week, just miles away from the courthouse, a Brooklyn Center police officer was charged with manslaughter after she fatally shot 20-year-old Daunte Wright during a traffic stop.

Tensions are high throughout the region, and authorities have ramped up security around Minneapolis.

The Hennepin County Government Center has been surrounded by fencing and barricades since jury selection began in March. This past week, crews installed razor wire around some police buildings, and National Guard troops have been deployed in parts of downtown Minneapolis.

Gov. Tim Walz requested additional law enforcement assistance from Ohio and Nebraska in advance of the verdict, according to a press release from his office on Monday.

Prosecution: 'Believe your eyes'

In his closing argument, Schleicher spoke for an hour and 43 minutes as he sought to prove that Chauvin used excessive and unreasonable force and caused Floyd's death.

He contrasted Chauvin's "ego-based pride" with the proper feelings of pride in wearing a police badge and praised policing as a noble profession. He insisted the state was prosecuting Chauvin individually -- not policing in general.

"This is not an anti-police prosecution; it is a pro-police prosecution," he said. "There is nothing worse for good police than bad police."

Schleicher's closing argument relied on a series of video clips that showed Chauvin's actions that day, linking them explicitly to the language of each charge.

"George Floyd's final words on May 25, 2020, were, 'Please, I can't breathe,' and he said those words to Derek Chauvin," Schleicher told the jurors. "All that was required was a little compassion, and none was shown on that day."

Schleicher told jurors to reject defense theories and look at what they know happened.

"You need to focus on what did happen. George Floyd was not a threat, he never was. He was not resisting. He was just not able to comply. They should have recognized that," he said.

"The defendant was on top of him, stayed on top of him, grinding, his knees into him. Pressing down on him, continuing to twist his arm twisting. up against the handcuffs. A pain compliance technique without the opportunity to comply," he added.

At the end, Schleicher simplified the case into a concise argument: "Believe your eyes."

Defense: 9 minutes and 29 seconds ignores the full story

Nelson's case to acquit Chauvin has been to argue that his use of force was appropriate, that he was distracted by the crowd of hostile bystanders and that Floyd died due to fentanyl and methamphetamine use, his resistance of officers and his underlying health issues.

He said the prosecution's focus on 9 minutes and 29 seconds, rather than Floyd's active resistance in the minutes earlier, was inappropriate.