A 26-year-old man arrested in connection with the murder of a Vincent Parsons has been released without charge.
Mr Parsons was attacked in the Killenarden Estate in Tallaght on the 24th of August.
He was found unconscious by a passer-by, and died in hospital two days later.
Yesterday's arrest was the second arrest of the investigation, after a 24-year-old man had been released without charge.
A file will be prepared for the DPP and investigations are ongoing.