A 27-year-old man arrested in connection with the murder of Malcolm McKeown has been released.
The man was arrested in Belfast on Wednesday. He has been released pending a report to the Public Prosecution Service.
McKeown, a career criminal, was gunned down in broad daylight outside a filling station in Waringstown in August.
He was shot six times in an attack minutes after he left the shop at the petrol station. His body was found slumped in his car at the side of the garage.
A car believed to have been used by the murderers was later found burnt out on the edge of the Mourneview estate in Lurgan.
There have been a number of arrests in connection with the police investigation.
Two men, Jake O'Brien (25) and Andrew Martin (24) have been charged with McKeown's murder. Both deny the charge.