A MAN has been arrested in connection with the murder of Andrew Allen in Co Donegal.
Mr Allen (24), from Derry, was shot at a house in Buncrana in February 2012.
Gardaí arrested a suspect, in his early fifties, on Saturday in Co Donegal.
He is being questioned at Letterkenny Garda Station.
The victim, from the Top of the Hill in Derry's Waterside, was one of several intimidated out of the city by dissident republicans.
He had moved to the Links View estate in Buncrana, where he was gunned down through a window after a group of men tried to break down the front door.
The attack had been blamed on the Republican Action Against Drugs group.