It is 45 years since RUC Sergeant Joseph Campbell was shot in the head at the gates of the now abandoned police barracks in Cushendall, North Antrim. Two police investigations, a murder trial and a 13-year Police Ombudsman’s investigation have failed to find his killer. Time may have eased Rosemary Campbell’s anger at justice’s failure of her husband, but the nightmares have never gone away. Rosemary’s dreams are troubled.   “Funny thing, it’s always an aeroplane and it can follow me even to the chapel and look in the window. I can be anywhere; I could be in my father’s home in Tyrone and this aeroplane…