A 37-year-old man arrested by detectives investigating the murder of Raymond Johnston has been released unconditionally.
He had been detained under the Terrorism Act in west Belfast on Wednesday.
Twenty-eight-year-old Mr Johnston was shot in the chest with a shotgun in front of his partner and an 11-year-old child last month.
It is understood he had been making pancakes at a house in the Glenbawn Avenue area of Poleglass when the gunmen struck.
Dissident republicans have been blamed for the killing which has been described by police as savage.