Gardaí in Limerick have arrested a second man as part of their investigation into the murder of James Cronin in April 2008.
The man was arrested in Limerick yesterday evening and is currently being held at Henry Street Garda station.
He can be held for up to a week.
A 24-year-old man was arrested on Tuesday evening on the south side of Limerick city.
He is being detained at Roxboro Garda station under section 50 of the Criminal Justice Act and can be held for up to seven days without charge.
The body of James Cronin (20) was found by gardaí on April 7th, 2008, while they were carrying out searches following the murder of Mark Moloney (40) who was shot dead 48 hours earlier.
Mr Cronin's body was discovered half buried in a field at Caledonian Park. A subsequent postmortem by State Pathologist Dr Marie Cassidy concluded that he died from a single shotgun wound to his head.
Although a number of arrests have been made, no one has been charged with the killing, which gardaí believe was related to gang feuds in Limerick.
Meanwhile, a 24-year-old man arrested on Monday as part of the same investigation has had his time in custody extended.