By talking to members of the Fullerton family, Irish and British politicians, political commentators, a former member of the Northern Ireland security forces as well as hearing the testimony of a new witness, this programme examines the murder of Donegal Sinn Féin councillor Eddie Fullerton, shot in his home town Buncranna, in Co. Donegal in 1991. The exclusive new evidence revealed in “Fullerton”, not alone points the finger at British Intelligence as being behind the murder of this Irish elected representative, the new informaqtion also casts a further dark shadow on the Donegal Gardai and raises serious questions for the Police Service of Northern Ireland as well.