A 26-year-old man has been arrested on the suspicion of the murder Vincent Parsons in Tallaght last month.
The 34-year old from Clondalkin died on August 26th, following an attack on the 24th.
Vincent Parsons had been discovered in the Killenarden Estate with serious head injuries. It is believed he had been attacked at a nearby pub.
He had been taken to hospital in Tallaght where he was pronounced dead.
It's the second arrest as part of the investigation - a 24-year-old had been released without charge last month.
The 26-year-old man has been taken into custody and detained at Tallaght Garda station, while a spokesperson for the force has said investigations are ongoing.
Speaking about the post-mortem last month, Superintendent Ian Lackey said, "the initial findings of that post mortem are that Vincent met a very violent death."
"Our incident here has been upgraded to that of a murder investigation. We have a team of in excess of 50 detectives and Gardaí working on it".
"There was some form of altercation in the pub but the significant assault or attack, it took place outside the pub. We believe there were at least two people involved - we have made some progress to date, but we need the public's help in bringing it a little bit further"
