Two men being held over the murder of Daniel McKay have been released.
A spokeswoman for the PSNI said the pair, aged 51 and 24, had been released unconditionally.
A 25-year-old man detained on Thursday was also released.
Mr McKay, a 36-year-old father of one, was shot dead at his home in the Longlands area of Newtownabbey, Co Antrim, on October 25.
His funeral was held on Friday.
Detectives investigating a drugs link said they could not rule out the involvement of dissident republican vigilante groups.