Gardai in Dublin are questioning a man in connection with the murder of Dean Johnson in Clondalkin last year.
The 20 year old was shot dead at Neilstown Road on the 24th of 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 detained yesterday but has since been released without charge.
