Image source, Court TV

Critics of the George Floyd arrest have said his alleged use of a counterfeit bill amounted to a misdemeanour and he should not have been arrested.

The witness, however, says Derek Chauvin and his fellow officers had "reasonable suspicion to detain" and "probable cause to arrest" Floyd.

Barry Brodd notes that Floyd's actions before the arrest and his resistance to arrest justified the officers holding him down.

"Was this a deadly use of force?" asks defence attorney Eric Nelson.

"No, it was not," says Brodd.

He adds that the manner of Floyd's detention was compliance by "stimulating with pain".

"Officers don't have to fight fair," says Brodd, explaining that they have to find and maintain control.

Tara McKelvey
BBC News, Minneapolis

Image source, Reuters

Defence lawyer Eric Nelson only needs one juror.

If Nelson can convince him or her that Chauvin is not guilty, he can stop the jury from reaching a unanimous decision.

With one of his first witnesses, Shawanda Hill, Nelson asked about Floyd sleeping in a car when he was approached by a store clerk.

The image of Floyd, sleeping in the car, possibly under the influence of drugs, was part of Nelson’s effort to hint at his state of mind.

So far, Nelson has tried to paint a picture of Floyd as a drug user with health issues.

Floyd's actions and his lifestyle, Nelson is trying to show, helped bring about his death.

If one juror agrees, or wavers in the opinion that Chauvin and his treatment of Floyd contributed to his death, then Nelson could score a victory with the case.

Barry Brodd says he offered his services on the Floyd case before being retained by Derek Chauvin's defence team.

He is the first use of force expert to testify that Chauvin acted with proportionate and appropriate force.

"I felt that Derek Chauvin was justified and acting with objective reasonableness following Minneapolis police department policy and current standards of law enforcement in his interaction with George Floyd," he says.

The witness says that "the imminent threat" posed by Floyd was a major factor in his detention.

“From a police officer's standpoint, you don’t have to wait for it to happen. You just have to have a reasonable fear that somebody is going to strike you, stab you, shoot you,” he explains.

"It's easy to sit in an office and judge an officer's conduct," says Brodd. "It's more of a challenge to put yourself in the officer's shoes."

It's been another dramatic day in Minneapolis, the city where the trial of Derek Chauvin is taking place.

If you're just joining us, here's an overview of what's been happening.

• The defence for Chauvin, the former police officer charged with murder and manslaughter in George Floyd's death, has begun to call witnesses on day 12 of his trial
• We heard from Shawanda Hill, an acquaintance of Floyd's who was in the backseat of the car when officers first confronted him. She said he "nodded off" in the car before officers arrived
• We also heard from Peter Chang, a Minneapolis Park Police officer who responded to the scene of Floyd's arrest. Chang told the court the crowd of bystanders around Floyd was "very aggressive to the officers"
• Before the trial began, a second night of unrest rocked nearby Brooklyn Center following the fatal shooting of a black man, Daunte Wright
• Kim Potter, the 26-year police veteran who shot Wright in a Minneapolis suburb on Sunday, has resigned from the force
• The chief of Brooklyn Center Police Department also resigned
• The family of Wright gave an emotional news conference in which his mother Katy described a traumatic phone call before his fatal encounter with police

The afternoon session has begun and retired Minneapolis Park Police officer Barry Brodd takes the stand.

Brodd is an expert in the use of force and he has also worked as a defensive tactics instructor, including teaching officers how to manage crowds and non-compliant suspects.

He is the seventh witness to take the stand today.

Image source, Reuters

Turning away from the trial for a moment, we can show you some scenes from protests that erupted on Monday over the fatal shooting of a black man near Minneapolis, Minnesota.

The protests in Brooklyn Center marked the second night of unrest over the death of Daunte Wright, 20, on Sunday.

Image source, Reuters

Image source, Reuters

Protesters defied a curfew and threw objects at police, who responded with flash grenades and tear gas.

Police said protesters had pushed against the fence of the Brooklyn Center police headquarters, prompting a decision to push back the crowd back.

The protests took place just a few miles away from the courtroom where Chauvin's trial is unfolding, adding to the tension gripping the city.

Image source, Reuters

Image source, Getty Images

As jurors take their lunch in the courthouse where Derek Chauvin stands on trial over the death of George Floyd, civil rights attorney Ben Crump has convened a news conference outside the building.

Amid snowfall, the families of George Floyd and Daunte Wright gathered to mourn.

Daunte Wright was shot and killed by an officer in a nearby suburb over the weekend. His death has ignited new racial justice protests amid the Floyd trial. The officer as well as the city's police chief have now resigned.

Wright's mother, Katie, broke into tears as she described how her son had called her when the police pulled him over on Sunday.

“That was the last time I heard from my son and I have had no explanation since then," she said.

Chyna Whitaker, Wright's girlfriend and the mother of his son, said: "They stole my son’s dad from him.”

Philonise and Rodney Floyd, the younger brothers of George Floyd, told the Wright family they would stand alongside them in solidarity.

“It’s time for change and that time is now," says Philonise Floyd. "Minneapolis, you all can’t sweep this under the rug anymore.”

Sketches of court proceedings are common in high-profile criminal trials in the US.

That's because cameras are not usually allowed in courtrooms - though that's not the case in this trial.

The set up is a little different this time around thanks to pandemic-related restrictions on who can attend in-person.

The sketch artist is actually watching from a video feed, much like the rest of us.

Here are some of the drawings from Monday - including renderings of the emotional testimony from Floyd's brother, Philonise.

Image source, Reuters

Image source, Reuters

Image source, Reuters

Barbara Plett Usher
BBC News, Minneapolis

A central part of the defence case is that George Floyd died because of a drug overdose, rather than Derek Chauvin’s knee on his neck.

Chauvin’s attorney asked witnesses to describe Floyd’s behaviour, including the woman who was with him on the morning he was arrested. This was apparently to establish his physical reaction to opioids.

The defence also called two people involved in a prior arrest – but legal expert Mary Moriarty, a public defender in Hennepin County, told me this backfired, because under cross-examination one in effect admitted that Floyd did not have a serious physical reaction to drugs during that event.

The defence has not revealed whether Chauvin will take the stand, and it’s expected to finish its case by the end of the week.

The police killing of a 20-year-old black man, Daunte Wright, has amplified the anger and trauma of people here. For a second night, police clashed with protesters, who were still outraged even though it seems now the shooting was an accident.

And this is creeping into the trial proceedings – the civil rights lawyer who represents Floyd’s family is expected to announce he’s taking on Wright’s case as well.

In a news conference moments ago, Brooklyn Center Mayor Mike Elliot said he has appointed 19-year police veteran Tony Gruenig to take over as acting police chief after the former chief resigned earlier today.

Gruenig says he has "no prepared statements. Just trying to step forward and fill a leadership role right now."

He adds that he has only just learned about his new job about 30 minutes ago.

"Very chaotic right now," he says, when asked about the current situation in the suburb about 10 miles (16km) from the courthouse where the Chauvin trial is taking place.

"There's just a lot of chaos right now. We're trying to wrap our heads around the situation and create some calm," he says.

"I appreciate the officer stepping down," the mayor added at the news conference, saying that Kim Potter had not been asked to resign and made the decision herself.

"We want to send a message to the community that we're taking the situation very seriously," the mayor continues.

"Although things didn't unfold, ultimately, the way we thought they should unfold, we're hoping that we're turning over a new leaf now."

We've learned that Kim Potter, the 26-year police veteran who shot Daunte Wright in a Minneapolis suburb on Sunday, has resigned from the force.

Her departure is "effectively immediately," Brooklyn Center Mayor Mike Elliott said in a statement.

According to the Minneapolis Star Tribune newspaper, Potter wrote to city officials: "I have loved every minute of being a police officer and serving this community to the best of my ability, but I believe it is in the best interest of the community, the department, and my fellow officers if I resign immediately".

It comes one day after the police chief said that she appeared to shoot Wright accidentally, after mistaking her gun for her Taser.

Though the Wright case itself is unrelated to the Chauvin trial, it has heightened tensions in the city.

MacKenzie also takes questions from prosecuting lawyer Schleicher.

He asks MacKenzie about the training officers receive in relation to suspected cases of excited delirium.

"One of the things they [officers] are told to do is put the person in the side recovery position. That is to help facilitate breathing because excited delirium - if it exists - could compromise proper breathing," Schleicher asks.

MacKenzie agrees.

Schleicher then asks if officers are trained to initiate CPR if necessary.

“An officer like Mr Chauvin would have received CPR training on a regular basis?" Schleicher asks. MacKenzie says yes, he would have.

In response to a further question about excited delirium, MacKenzie says it’s “not our place” to diagnose the condition. She testifies that only a medical professional would make such a diagnosis.

Excited delirium is considered to be a condition by some, but is not accepted by the American Medical Association or World Health Organization.

The court is now taking a lunch break.

Image source, Getty Images

This may be a televised trial, but unseen and unheard, fourteen jurors have sat in the courtroom over the past three weeks.

The jurors, who will remain anonymous for their own safety and privacy, will decide whether Derek Chauvin should serve time in prison for George Floyd's death or be acquitted with no charges.

Selecting them was no easy feat due to the high-profile nature of the case. Over 11 days of jury summons, the two legal teams settled on a panel that skews younger, more white and more female.

It includes a black grandmother in her 60s who once lived a few blocks from where Floyd died.

Another juror, a white woman in her 50s, worked at a suburban business damaged last summer after Mr Floyd's death.

And a black man in his 40s was added to the jury after he agreed that minorities are mistreated by the police, but police departments should not under any circumstances be defunded.

Here's what else we know about the jury.

Back from a short break, the defence summons another police officer to the stand.

Officer Nicole MacKenzie is a medical support coordinator with the Minneapolis Police Department. She was already a witness for the prosecution.

MacKenzie will factor into the defence's argument that George Floyd may have suffered from excited delirium, a condition she describes as a combination of "psychosis, agitation, incoherent speech, superhuman strength, hypothermia".

She testifies that suspects going through excited delirium may attempt to remove clothes, exhibit violence towards objects, behave in a resistant manner, ignore commands and display mental health issues.

The witness says such suspects should be placed into recovery positions and receive emergency medical assistance as quickly as possible.

Excited delirium is not a condition recognised by the American Medical Association, American Psychiatric Association or the World Health Organization.

Image source, Reuters

All members of the Minnesota Police Department are backed by law enforcement funds that assist police officers in criminal trials.

Despite being fired by the department after George Floyd's death, Derek Chauvin is being backed by a $1m (£728,000) legal defence fund from the Minneapolis Police and Peace Officers Association (MPPOA).

Chauvin paid dues to the local police union over his 19 years on the force. During jury selection, prosecutors representing the state of Minnesota said: “The police federation, the union, is funding the defendant’s defence.”

However, the union - the Minneapolis Police Officers’ Federation - does not support his case. Chauvin receives these benefits as a member of the MPPOA.

Chauvin's lead attorney Eric Nelson is a private attorney with the law firm Halberg Criminal Defense.

He is supported by a 12-person team of lawyers, not all of whom are inside the courtroom, due to coronavirus restrictions.

Image source, Getty Images

We heard earlier from Shawanda Hill, an acquaintance of Floyd's who was in the backseat of the car when officers first confronted him.

Hill was also among the millions of Americans who took to the streets to express their grief in the days following Floyd's death.

Here are two pictures of her at the scene of Floyd's arrest, taken a day after it happened.

Image source, Getty Images

Now it's the prosecution's turn to question Chang.

Prosecutor Steven Schleicher asks Chang about his involvement in the incident.

He talks about the moment when Chang first arrived at the scene and saw Floyd sat down in handcuffs.

“Right there sitting on the sidewalk, he [Floyd] was pretty peaceful?" Schleicher asks. Chang agrees.

With Schleicher's questions finished, the court goes for a short break.

Defence lawyer Nelson asks Chang a few follow-up questions about the bodycam footage.

He asks Chang why he was pacing around the road during Floyd’s arrest.

“I was concerned for the officers’ safety because of the crowd,” he says. “I wanted to make sure the officers were okay.”

Chang says that he observed several people standing on the street during the incident.

He agrees with Nelson’s description of the scene of the incident as a “busy intersection”.

Nelson says no has no further questions for Chang.

Image source, Court TV

Throughout the trial, Chauvin has been largely inscrutable, showing little emotion during witness testimony. He generally listens intently while scribbling notes on a yellow legal pad.

Today is no different, as he watches his defence lawyer make the case for his acquittal.

Wearing a navy blue suit and a mask, Chauvin appears to be maintaining the calm demeanour we've seen so far.

He will get a chance to defend himself in court - but it's not yet clear if he will take the stand as a witness himself.

More now from Chang's bodycam footage.

"Why is he going to hospital?" Hill asks Chang, who instructs her to stay put and not approach Floyd.

She asks where Floyd went as the ambulance departs. Another witness comes over and says "somebody call his family".

"I tried to get him to get in the car," the man tells Floyd's two acquaintances.

With that, the video ends.