Hanson says that the scene she encountered made her alarmed.

"I was concerned to see handcuffed man who was not moving with officers with their whole body weight on his back and a crowd who was stressed out," she says.

Like the other witnesses, Hansen was asked to circle a photo of herself at the scene that day.

She is seen on the video stepping off the kerb briefly. She says the officer at the scene - Officer Thao - "was demanding" that the crowd remain on the sidewalk.

Image source, Court TV

The BBC is asking Americans around the country about what they make of the Chauvin trial and the issues and emotions it is bringing forth.

A retired police lieutenant who spent 34 years on the force in two states, Randy trained law enforcement for over three decades and founded The Wounded Blue, a national organisation that assists injured and disabled officers.

How are you feeling as you watch this trial?

If this was a normal trial - that is, there wasn't so much politics and emotion involved - I'd much rather be sitting at the defence's table than the prosecutor's table. The fact they charged Chauvin with three charges indicates that they are not confident in a conviction. They're throwing it against the wall and hoping that one will succeed in a conviction.

The issue is that there are so many sociological factors at play here and, whether or not you can get an entire jury to agree on a conviction is going to be a very large burden for the prosecution.

This is a highly charged and emotional case, so that is a huge hurdle for the defence. No use of force looks good. It is always ugly and controversial, but that doesn't mean it's not reasonable.

What did you make of Monday's opening arguments?

The prosecution has signalled their strategy very clearly and that is to work on the emotions of the jurors. They did that by the initial playing of the video. Now the prosecution has the heavy burden of proving beyond a reasonable doubt that there was intent involved with his death.

The defence was prepared, coherent and easily understandable. There was no flashiness or flamboyance. It was meat and potatoes defence work. This was about explaining to laypeople the very complicated issue of the reasonableness of Chauvin's actions because that is going to be the linchpin of this case.

What impact do you think this trial will have?

This has already affected law enforcement in ways that will ripple through for decades. The entire parameters of use of force are being re-examined. The pullback of resources. The defunding aspects. The training aspects.

There is a crisis in law enforcement and it is barrelling towards us like a freight train. And that is de-policing, a lack of qualified applicants willing to enter the profession, and the lack of retention of officers. You're seeing them quit and retire, and there's a huge learning curve in the confidence levels of law enforcement.

Read more responses here:

Americans react to Day One of the Chauvin trial

Image source, CourtTV

Hanson says she has lots of experience administering first aid to people who do not have a pulse.

She says she works in an area with a large amount of drug overdoses. She says she gives first aid to people without pulses "anywhere from one to five times in a 24 hour period".

When she found herself outside Cup Foods on 25 May, she had just gone on a walk in an effort to have "a peaceful day" on her day off.

She noticed the lights of the police car, and wondered if a fire was going on, or if her co-workers were responding to the scene.

"As I got closer there was a woman across the street screaming that they were killing him."

Samantha Granville
BBC News, Minneapolis

Image source, Getty Images

Family for Derek Chauvin and George Floyd are each allowed one seat in the courtroom but this morning, no one turned up for Chauvin.

A family member for George Floyd turned up right before trial started this morning.

He wore a black mask, a black jacket and glasses.

He listened intently - and leaned forward during emotional testimonies to really pay attention.

Reactions from jurors have been mixed.

The jurors sitting closes to the various witnesses seem to stare intently back and forth from witness to questioning lawyer.

Some jurors in the back take notes, and others stare straight ahead.

As the morning dragged on, they sat in more relaxed positions, and stretched their arms and necks here and there.

A few jurors snuck in time checks on their watches.

Chauvin has continued to take copious notes, looking up now and again to gaze at the judge or witnesses.

At one point he was asked to take his mask off so a witness could fully identify his face.

Hanson, a 27-year-old firefighter, begins her testimony by describing her experience training as an emergency medical technician (EMT).

"It's quite a difficult test," she says, describing the medical exam she took.

Cameras are back on again, after the four underage witnesses completed their audio-only testimony.

The witness was on the scene of Floyd's arrest and begged police to check his pulse.

Image source, Reuters

It's day two of arguments in the trial of Derek Chauvin, the ex-Minneapolis police officer accused of killing unarmed black man George Floyd.

The prosecution is continuing to call witnesses, some of whom are then cross-examined by Chauvin's lawyer. It will be at least two weeks until the defence can call its own witnesses.

Here's a recap of what's happened today:

• The day began with witness Donald Williams, a pro-fighter who argued and pleaded with officers on the scene to let Floyd breathe.
• Williams's testimony at times became tense, as he clashed with Chauvin's defence attorney who had questioned why he was so "angry" and implied that he threatened the arresting officers.
• Four children who were under the age of 18 at the time of Floyd's arrest took the stand. Their testimonies were audio-only, as the judge decided they should not be shown on camera - but they have given some of the most gripping descriptions of what they saw that day.
• Darnella, a teenager who recorded the widely-seen video of Floyd's arrest, cried as she said she wished she had done more to save his life. “When I look at George Floyd I look at my dad, I look at my brother, my cousins, my uncles – because they are all black," she said through audible tears. “I stay up apologising to George Floyd for not doing more".
• Several witnesses testified that Chauvin did not remove his knee from Floyd's neck despite the distress expressed by onlookers and by Floyd.
• Footage of Floyd's death has been played several times throughout the day.

Genevieve Hanson, a Minneapolis firefighter who has arrived to court in uniform, is testifying now.

She was at the scene that day, and pleaded with officers to let her check Floyd's pulse.

Samantha Granville
BBC News, Minneapolis

The prosecution has been playing different clips with different angles of the Floyd arrest with each witness, but each time it’s been difficult for those in the court room.

A nephew of George Floyd, Brandon Williams, who was in the allotted family seat in the court room, says he has not watched any of the videos because it’s too hard. “It’s like watching my brother die a slow and painful death,” he says.

He stayed seated, legs crossed, breathing deeply.

Later in the afternoon, a new family member came in the room. He appeared to stare straight ahead, at nothing in particular, while different videos played.

Not all jurors are watching the screens either. Some are taking notes, others look ahead at witnesses only.

The second day of the Derek Chauvin trial has featured gripping testimony from witnesses to the 25 May, 2020 arrest.

The testimonies follow an initial day of proceedings on Monday in which the prosecution and defence laid out their cases in opening statements. The trial is expected to last about four weeks.

Here's a look at the highlights from yesterday.

The BBC is asking Americans around the country what they make of the Chauvin trial and the issues and emotions it is bringing forth.

A community activist, an entrepreneur and a father of two, Curtis went viral last year for his impassioned message about the generational injustices African Americans have suffered. He is now running for city council in his hometown of Charlotte, North Carolina.

How are you feeling as you watch this trial?

Having to watch the details of what happened, having to watch the video over, having to relive the moment - it was hurtful. I'm still in awe and I can't believe it happened.

It pisses me off. We have some of the most horrific mass murderers of our time in custody without a scratch, but this black man who allegedly uses counterfeit $20 bill loses his life and loses it tragically.

They've got to convict the [former police officer]. If they don't convict him, it's going to be a problem.

What did you make of Monday's opening arguments?

The prosecution presented very good evidence. He was very detailed and said some things that I think will be really critical to the case. He reminded us of an officer's oath and said, despite all his training, this officer sat on someone's neck for nine minutes and 29 seconds.

As for the defence, they're trying to make it seem like George Floyd was a drug addict and the opioids took his life.

What impact do you think this trial will have?

I'm watching the case closely because I want to see what the outcome is going to be. Are we going to hold this officer accountable for his actions?

This is a chance for America to show exactly what they represent: giving everybody liberty and justice for all.

If you don't convict him of all three charges, you're simply telling black America and minority Americans that we do not care for you. This is a white America and you're going to get down or lay down. Now people are fighting for equality, but soon they'll be fighting for revenge.

Read more responses here:

Americans react to Day One of the Chauvin trial

The young witness is being led through a detailed account of the day George Floyd died.

"He was digging his knee into George Floyd's neck," she says of Chauvin.

While watching the events unfold, Chauvin became hostile, she says.

"He did grab his mace and started shaking it at us," she says.

"I didn't know what was going to happen," the witness says. Her voice is shaking, she sounds upset, nervous.

"I was scared of Chauvin," she says.

Prosecutors show a photo of bystanders - the witness identifies herself toward the front of the crowd.

The defence declines to question her, so she steps down.

Tens of thousands of people around the world have protested against the death of George Floyd. For many it’s reminded them of the issues they face in their own countries, including their own personal experiences of racism.

BBC Minute’s Kash Jones spoke to protesters from New Zealand to France to find out why they took to the streets over Floyd's death.

The current witness, a friend of the last witness Alissa, says the two of them drove up to the scene. Alissa initially told her to wait in the car, the witness says.

She testifies that she heard commotion whilst sitting in the car.

"I heard George Floyd yelling, saying he can't breathe," she says. "I heard witnesses that were there saying he was unresponsive."

When the voices got louder, she said, she got out of the car.

"It sounded serious," she says.

When she got out, she says she saw Floyd "unconscious" and Chauvin "on his neck".

The witness elaborates saying Floyd wasn't talking and his eyes were closed.

Larry Madowo
BBC News, Minneapolis

Image source, Getty Images

We’ve been speaking to people at George Floyd Square in Minneapolis and they say white America is on trial, but they want to see what happens. If a black man dies on video - it happened to George Floyd - can they get justice in America?

An activist I spoke to told me it's still not easy to tell how the trial will play out because there's a lot to deny on one side, and there's a lot to prove on the other.

They told me that that even though we have the video footage from prosecutors - nine minutes and 29 seconds - it will still take a lot to convince the jury that there is a case to answer here.

After a short break, court is back in session. The prosecution is continuing its questioning of the next witness, a friend who was with Alissa, the previous witness, and on whose phone much of the altercation was recorded.

The prosecution has been calling to the stand several civilian witnesses to George Floyd's arrest. This image was taken from the point of view of the police during the arrest, and shows the onlookers to the incident. Minors who were under 18 at the time are blurred out. So far, six people in the photo have been identified in court and four have been called to the stand.

1. Donald Williams - The mixed martial arts fighter was questioned for over an hour by the prosecution and the defence on Monday and Tuesday. In eyewitness video, he can be heard calling the police "bums" and asking them to get off Floyd. He served as the prosecution's Witness #3.
2. Darnella - This teenager filmed the viral video that made its way around the world and ignited the racial justice protests after George Floyd's death. She was called as Witness #4.
3. Darnella's cousin - This 9-year-old took the stand as Witness #5. She and her cousin had been walking to Cup Foods to get snacks when their attention was drawn to the exchange happening between Floyd and police. She said the incident made her feel “sad and kind of mad”.
4. Alissa - This 18-year-old is Witness #6. She arrived at Cup Foods that day by car. She identified person number five as her friend from school. She says the incident has left her feeling "numb".
5. Kalen - The 17-year-old high schooler is Witness #7. She arrived with Alissa, the sixth witness, at Cup Foods by car.
6. Genevieve Hanson - She was first identified to the court by Donald Williams as a firefighter. He said she continually asked police to check Floyd's pulse. The state later called her to the stand as Witness #8.

Image source, Court TV

It is the second day of his trial, but we have not yet heard from Derek Chauvin.

When directed by his lawyer, Chauvin rises from his chair for witnesses to identify him. He removes his mask to reveal an almost expressionless face. He stays silent.

But Chauvin remains engaged. As witnesses speak, he listens intently, occasionally furrowing his brow and taking almost constant notes on a yellow legal pad.

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

The lawyer representing Chauvin, a 19-year police veteran, has been provided to him by the Minneapolis Police and Peace Officers Association's legal defence fund.

Chauvin was fired one day after the Minneapolis police chief viewed the widely watched video of Floyd's arrest.

The union has defended their backing for the former officer, despite his dismissal, saying that he was in the force at the time of his alleged crime.

The group is paying over $1m and providing around a dozen lawyers to his defence.

The young girl says she knew George Floyd was gone because he was "limp" and "didn't look alive".

When the paramedics came, she says, "they proceeded to put him on the gurney and he didn't really say anything".

She says the incident has left her feeling "numb". She kept to herself in the days after Floyd's death, she says.

She has never gone back to the Cup Foods store.

The defence is now questioning the witness.

Barbara Plett Usher
BBC News, Wilmington

Kaia Hirt has been chained for more than 12 hours to the security fence around the government building where the courtroom is located.

She told me she was pleased there is a trial to hold George Floyd’s alleged killer to account, although she accused the defence of “trying to gaslight the entire country and perhaps the world into believing that we didn’t see what we saw in the video”.

But she’s taking this extreme action to remind people that he’s not the only victim of “police homicide” in Minnesota.

She’s sitting next to an art installation that includes locks bearing their names attached to the fence. “Because we don’t have an unedited video of the murder of these other victims, they haven’t gotten the attention that George Floyd got,” she says.

Her protest is a reminder that this high profile case comes after a long history of complaints against the Minneapolis Police Department. Minnesota's Star Tribune has documented 206 names, external of people who died after a physical confrontation with law enforcement in the state since 2000.