A loyalist shot dead in front of his young son in a supermarket car park had recently relocated to the area amid concerns he would be targeted in a paramilitary feud.
Colin Horner, from Carrickfergus, Co Antrim, was shot while he was in the car park of the supermarket on the outskirts of Bangor, Co Down.
Mr Horner, 35, was an associate of fellow Carrickfergus loyalist George Gilmore, who was shot dead in the town in March.
The 44-year-old was killed as part of a long-running feud among rival loyalists in Carrickfergus.
Facing similar threats to his life, it is understood Mr Horner relocated from Carrickfergus to Bangor.
Mr Horner's young son witnessed his father's murder yesterday afternoon.
The PSNI said it was lucky the boy was not killed or seriously injured as well.
There were reports of a confrontation before the killer fired four to six bullets at Mr Horner.
Detectives believe that there may have been more than 100 witnesses to the shooting and the aftermath.
PSNI Superintendent Brian Kee: "It is beyond belief that the gunman shot the victim when he was out with his son.
"This young boy witnessed everything and he will undoubtedly carry that memory for the rest of his life."
