The tense moment Dr David Dao argued with a Chicago cop just seconds before being humiliatingly hauled off an overbooked United Airlines flight has been captured on camera.

Footage of Dr Dao being unceremoniously dragged from a plane at Chicago O'Hare International Airport on Sunday has traveled around the world, leading to mass condemnation of United and its policies.

But exactly what happened in the moments leading up to the doctor being pulled from the fight by his arms was unknown.

Until now.

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New video has emerged showing Dr David Dao arguing with police and a flight attendant just moments before he was dragged off an overbooked United flight in Chicago on Sunday night

The new video, recorded by a female passenger sitting directly behind Dr Dao, starts with a flight attendant and police officer standing in the aisle.

The doctor is seen gesturing with his arm towards the cop, while talking on his cellphone.

‘I won’t go. I’m a physician I have to work tomorrow, eight o’clock,' he is heard saying.

Dr Dao then tells the person he is talking to on the phone: 'I… I tell you… make a lawsuit against United Airlines.'

The officer is then heard in the video again asking Dr Dao to leave.

'No I am not going,' he replies, shaking his head angrily.

Dr David Dao is pictured bleeding from the mouth after he was body slammed by cops and dragged off the overbooked United flight at Chicago O'Hare

Screaming: The man who had refused to to give up his seat on the overbooked United flight from Chicago to Louisville on Sunday night was dragged off the plane by three cops

The cop then says: 'Well… I have to drag you... You know how this is going to end up happening, right?'

Dao then replies: 'You can drag me, I'm not going. I'm staying right here. You'll have to drag me.'

The cop then says, 'I'm just telling you, it's going to be a lot harder for you...', before Dao interrupts with: 'Yes I know that, I'd rather go to jail.'

'You'd rather go to jail than just getting off,' the cop replies, while sounded confused at the comment.

'Yes,' Dao is heard saying.

The two then continue speaking for a few more seconds, with Dr Dao mentioning he had flown to Chicago from Los Angeles and was desperate to get home, before the video cuts off.

The new video showing Dr Dao talking on a phone, before he gets agitated and waves his hand at the cop and the flight attendant

‘I won’t go. I’m a physician I have to work tomorrow, eight o’clock,' he is heard saying. Dr Dao then tells the person he is talking to on the phone: 'Make a lawsuit against United Airlines

The video emerged as United CEO Oscar Munoz, 57, spoke to Good Morning America on Wednesday in his first public appearance since the scandal broke.

The interview started when the 57-year-old - who earned about $6.7million last year - was asked what his first reaction was to seeing the videos of a bloodied Dr Dao being pulled from the plane.

'It's not so much what I thought it's what I felt - probably the word shame comes to mind,' he told ABC's Rebecca Jarvis.

'As I think about our business and our people the first thing I think is important it to apologize to Dr David Dao and his family, to the passengers on that flight, to our customers, and our employees.

'That is not who United is... you saw us at a bad moment.

Munoz was then asked about his initial responses to the controversy, which led to him being labeled 'tone deaf'.

This graph shows how United's stock price took a severe hit on Tuesday morning, before recovering throughout the day and into Wednesday. It has since fallen again to $70.05 at 11am

United's under-fire CEO Oscar Munoz spoke to Good Morning America in his first appearance since the airline's Dr Dao scandal on Sunday night

His initial statement read: 'This is an upsetting event to all of us here at United. I apologize for having to re-accommodate these customers.'

He then drew further criticism by claiming Dr Dao was 'disruptive and belligerent,' and accusing him of trying to punch the police officers.

'The initial words fell short of truly expressing what we were feeling,' Munoz told GMA on Wednesday.

'And that's something I've learned from. The expression of apology, and specifically to the folks I mentioned before, is an important part of a conversation like this because that shame and embarrassment was pretty palpable.'

He then continued on in the interview to promise a similar incident will 'never happen again' on a United plane, before flagging changing to the airline's policy regarding removing passengers from overbooked flights.

'Specifically, the use of law enforcement aboard aircraft has to be looked at,' he said.

'We are not going to appoint a law enforcement official to remove a booked, paid, seated passenger, we cannot do that,' Munoz said on Wednesday morning

United CEO Oscar Munoz had earlier doubled down on his airline crew's decision to remove an elderly passenger, claiming he was 'disruptive and belligerent'. He has since walked back most of these statements in subsequent interviews

'They are clearly there for safety… but for other reasons that is a policy that clearly has to be looked at.'

When asked if police would do the same thing they did to Dr Dao again in future, at the airline's request, Munoz said: 'We are not going to appoint a law enforcement official to remove a booked, paid, seated passenger, we cannot do that.'

He also touched on potentially tweaking the airline's policy in regards to offering rewards to passengers so they surrender their seats on overbooked flights.

'I think, back to the broader system, there are many points we need to look at,' Munoz told GMA.

'There is an incentive program that works pretty well outside the gate, but clearly when you get aboard the plane your incentive model needs to change.

'We do empower our front-line folks to a degree, but we need to expand that to allow a little more common sense.'

Dr David Dao has been revealed as the man who was dragged from a United flight in Chicago on Sunday. He is pictured with his wife, Teresa, and their grandchildren

Munoz wrapped up the interview by saying he does not plan to resign, despite the controversy surrounding him and his airline.

'I was hired to make United better, we have been doing that and that's what I will continue to do,' he said.

United's stock continued a turbulent two days in the aftermath of the interview, with the airline's share price dropping for the second day in a row.

On Monday, United Continental Holding's share price peaked at $72.04 at 2:45pm.

It then took a tumble Tuesday, withing more than $200million being wiped off, before it appeared to rebound during the pre-trading hours of Wednesday morning.

It opened trading at 9am on Wednesday morning at $71.52 - a 1.15 per cent increase from close of trading on Tuesday evening - before dropping down to $70.05 at 11am.

On Tuesday, Dr Dao told Kentucky network WLKY 'everything' was injured after the ordeal.

A Chicago Aviation Department officer has been placed on leave over the incident.