19 year old Conor O'Brien was shot dead last week.
A man is due to appear in court today in connection with the murder of a 19-year-old in Enfield
Conor O'Brien, who was not known to gardai, was shot dead in the driveway of a house on the Trim Road last week.
Gardai first arrested a man in his 50s on Tuesday in connection with a different offence.
But the following day he was re-arrested in connection with Mr O'Brien's murder.