A man is being questioned by Gardaí in Dublin, in connection with the murder of Dean Johnson in Clondalkin in August 2013.

A 31-year-old man was arrested yesterday and was taken to Lucan Garda Station for questioning.

He can be held for up to 3 days.

A woman, also aged 31, was also arrested in relation to the investigation yesterday.

She has since been released without charge.