GARDAI have released a man without charge after arresting him in connection with the murder of Andrew Allen.
The man, who is in his 40s, was released on Thursday evening.
Mr Allen (24), from Derry, was shot in the bedroom of his home at Links View Park, Buncrana, on February 9, 2012.
His girlfriend, who was also in the house at the time, miraculously escaped being injured.
The Republican Action Against Drugs group later claimed they carried out the killing saying Mr Allen was a drug-dealer.
However his family has strongly denied the claims.