He was being held in Tralee Garda station under Section 4 of the Criminal Justice Act arising from the investigation into the killing of James Cahillane, aged 58, near Killorglin. He was arrested soon after 6.30am yesterday in Killorglin.
Senior gardaí described the arrest — which follows one of the most extensive murder investigations conducted in Kerry — as “significant”. He can be held for a maximum period of 24 hours.
A man in his late 20s and a woman in her early 50s, both from Killorglin, had been arrested in May 2013 and questioned in relation to withholding information about the murder, but were released without charge.
Mr Cahillane’s body was discovered following a fire at his home in Ardraw, Killorglin, early on April 19, 2012. An autopsy revealed that he died from extensive head injuries consistent with an assault and a murder investigation was launched.
More than 400 people have been interviewed during the probe and, in April, Chief Superintendent Pat Sullivan made a renewed appeal for public assistance, saying he believed there was more information to come from the community.
Mr Cahillane, a popular, inoffensive man who did not appear to have any enemies, had been socialising locally on the evening of Wednesday April 18, 2012.
After his day’s work as a maintenance electrician at the Fexco financial services centre in the town, the separated father of two did some grocery shopping and withdrew less than €100 from an ATM.
He visited some pubs in Killorglin before taking a taxi to his home, 5km on the Beaufort side of the town, not long before midnight. Among the lines of inquiry followed by gardaí was that he may have been attacked and robbed before the house was set on fire.
The emergency services were called after a neighbour saw the house ablaze at 2.20am.