A 29-year-old man has been arrested in connection with the murder of James Cahillane in Beaufort in Co Kerry two years ago.
The body of 58-year-old Mr Cahillane was found in April 2012 in the badly burned ruin of his house at Ardraw, Beaufort where he lived alone.
Gardaí believe that Mr Cahillane's killer set his house alight in a bid to destroy any DNA evidence.
The man arrested this morning is being held at Tralee Garda Station where he is being detained under Section 4 of the Criminal Justice Act.