A woman was arrested in Ballymun this morning in connection with the gangland-style murder of a man last June.
William O'Regan was killed at New Cabra Road on June 10th, 2003. He was shot several times in the head at close range by two gunmen at his home.
One man has already been charged with the murder.
The woman arrested today is being detained in Mountjoy Garda station under the provisions of Section 30 of the Offences Against the Persons Act, 1939.