A 32 year old man has been arrested by detectives investigating the murder of Joe Reilly in Poleglass.
The 43 year old was at his Glenwood Court home when he was shot dead in October.
It was described as a cold-blooded, summary execution of a man in his own house by police at the time.
A suspect was detained in Newtownabbey on Thursday.
He has been brought to Musgrave Police Station for questioning.
In a statement, Detective Inspector Darren McCartney said: “Mr Reilly was shot in his home in Glenwood Court at about 8pm on the evening of Thursday 20 October.
"I would continue to ask anyone who has any information about this murder to contact detectives on the non-emergency number 101, quoting reference number 1172 20/10/16.
"Or if anyone would prefer to provide information without giving their details, they can contact the independent charity Crimestoppers and speak to them anonymously on 0800 555 111.” he said
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