Police are appealing for information about the circumstances of the death of a 63-year-old man in Bangor on Christmas Eve.
Ronald Reid's body was discovered at his apartment on the Donaghadee Road in Bangor.
Detectives from Serious Crime Branch have assumed responsibility for the investigation and are particularly interested in activity around the block of flats where Mr Reid lived on Friday December 19.
Since the discovery detectives have been progressing inquiries but now Serious Crime Branch are taking forward the investigation.
Detective Chief Inspector Justyn Galloway, from Serious Crime Branch said: "Detectives are making house-to-house inquires in the local area and distributing an appeal poster with particular times and locations of interest to us.
“We are re-issuing a photograph of Ronald to the media as he would have frequented the town centre of Bangor regularly and been known to many local people. I am also updating our appeal for information and assistance.
“I want to hear from anyone who saw or heard anything unusual or suspicious at the Savoy flats complex on the Donaghadee Road between 8am and 9am on the morning of Friday 19 December.
“I would ask anyone with any information which may assist us with our enquiries to contact detectives at Serious Crime Branch in Newtownards on the new non-emergency number 101.
"Information can also be passed anonymously through the independent charity Crimestoppers on 0800 555 111.”