Gardai have arrested a 22-year-old man in connection with the 2017 fatal shooting of John Gibson.
Mr Gibson (28), a fitness instructor and father-of-two from Lucan, Co Dublin, died of multiple gunshot wounds in September 2017 after being ambushed in a car park on Fortunestown Lane, Tallaght, Dublin.
Gardaí believe he may have gone there to meet somebody, but that information on his whereabouts was passed on to his killers.
The man was held by gardai on Monday morning and is being detained at Tallaght Garda station under Section 30 of the Offences Against the State Act.