A 33-year-old man has appeared in court charged in connection with an armed robbery at a credit union eight and a half years ago during which a detective Garda was shot dead.

Brendan Treanor from Emer Terrace in Dundalk was charged with two offences, robbery of €7,000 in cash and cheques at the Lordship Credit Union in Bellurgan in Co Louth on 25 January, 2013 and conspiracy to commit burglaries between 11 September, 2012 and 23 January, 2013.

It is alleged that Mr Treanor conspired with others to enter homes with the intention of stealing the keys of the households' cars contrary to common law.

Sergeant Noel Mohan gave evidence of arrest charge and caution.

He told the court that Mr Treanor was arrested at 9.43am this morning and when he was charged with the offences he made no reply.

Gardaí said they would be objecting to bail but Mr Treanor's solicitor said they were seeking to perfect sureties and there would be no bail application today.

He also told the court that it was "most unheard of" and "an affront to open justice" to have closed hearings for a bail application.

Judge Eirinn McKiernan remanded Brendan Treanor in custody to Clover Hill to appear again at Dundalk District Court next week when the bail application is due to be heard.

Mr Treanor applied for free legal aid but gardaí sought an adjournment on it being granted.

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Inspector Darren Kirwan told the court that Mr Treanor may have been a director of a company and there were social media postings in relation to him being in possession of €100,000 of property.

The judge directed the provision of a vouched statement of means before legal aid could be granted and gave Mr Treanor permission to see his partner before being taken to Clover Hill.

Det Garda Adrian Donohoe was shot dead at Lordship Credit Union in January 2013

Meanwhile, a second man has been arrested in London in connection with the armed robbery.

The man, who is in his 30s, was detained this morning by officers from the UK National Crime Agency on foot of an extradition request from the Irish authorities.

Last October, Aaron Brady, of New Road, Crossmaglen in Co Armagh, was sentenced to life in prison for the murder of Det Garda Donohoe.

The 30-year-old was also sentenced to 14 years for armed robbery at Lordship Credit Union.

Det Garda Donohoe was on escort duty for the transportation of cash from four credit unions on the Carlingford peninsula on the night of Friday 25 January, 2013.

As he and his colleague Det Garda Joe Ryan were accompanying two cars with over €34,000 in cash out of Lordship Credit Union, a car blocked the exit and four men in balaclavas appeared.

Two of them were armed with a shotgun and a handgun.

Det Gda Donohoe got out to see what was blocking the way and was shot dead. His weapon remained in its holster.

Gardaí said €7,000 in cash was stolen in the robbery.