Former billionaire businessman Sean Quinn says he knew of a notorious violent gangster called 'Dublin Jimmy' but they weren’t friends, and he did not enlist his help to attack business rivals in an attempt to regain his corporate empire.

‘Dublin Jimmy’, whose real name was Cyril McGuinness, died of a heart attack when police raided his home during an investigation into the abduction and serious assault of Kevin Lunney.

Mr Lunney was one of several directors who had taken over the running of Sean Quinn's former business empire, as part of a management buy-out.

He was abducted and seriously assaulted in September 2019, the culmination of an escalating campaign of intimidation against the group's new owners.

In the final part of the RTÉ documentary Quinn Country, Sean Quinn said that he knew McGuinness from the locality, but denied ever speaking to him.

He was asked whether he had anything to do with the kidnap and assault for which three men were sentenced to lengthy prison terms.

"Absolutely nothing. Why would I bother my head with Kevin Lunney. Just think about why I would bother my head with Kevin Lunney," he said.

"One thing I think that someone should ask Kevin Lunney is why he was attacked.

"What they have done over the last six or seven years, the level of betrayal, is probably unprecedented in the history of this state."

But he said nothing justified the attack on his former associate.

"I don’t think that anybody, regardless of what way they’re annoyed, should have stooped to what they done to Kevin Lunney.

"That should never have happened. Human beings don’t do that to each other."

The episode charted attempts by Sean Quinn - once Ireland's richest man - to regain control of his businesses along the Cavan/Fermanagh border.

He had lost them in 2011 after a disastrous investment in shares of Anglo-Irish bank.

The Government had to nationalise the bank to which Sean Quinn owed €2.4 billion - a liability which fell on the taxpayer.

He owed a further €1.2bn to US bondholders.

As the state tried to recoup some of the losses by selling parts of the business it was met with a campaign of intimidation and violence as supporters of Sean Quinn sought to stop the sale.

At one point a pig's head was left at the home of one of the new directors. Another had his Dublin home firebombed.

Mr Quinn tried to hide millions of euros of overseas property assets which the courts had ordered to be handed over.

Alan Dukes, the former Fine Gael leader and a one-time finance minister, was on the board of the nationalised Anglo Irish Bank.

He said he believed that Sean Quinn still had access to substantial cash reserves in places like Switzerland and India.

"There’s reason to believe that a good chunk of it was brought to Switzerland where it’s probably in an inaccessible account and that there is a substantial amount of money in India as well."

He said Mr Quinn had achieved a "remarkable revitalisation" of a depressed part of the country.

"The footnote will have to be the very great pity that he gambled it all away," he told the programme.

The legacy of the collapse of Quinn Insurance is that everyone who takes out an insurance policy in Ireland, other than life insurance, continues to pay a 2% levy.

It's also estimated that attacks on former Quinn businesses have cost anything in the region of up to €10 million.

Sean Quinn became emotional as the programme ended.

He lost his composure as he spoke about his legacy.

"All I can say is that in my 75 years I never knowingly took anything that didn't belong to me.

"I think my legacy will be that I built up a great company, I employed a lot of people in a very poor area.

"I was an honest man and that the area will be more successful because of Sean Quinn than it would be without him.

"And that he got rough justice."