Police investigating the murder of Malcolm McKeown have released a photograph and made a fresh appeal for information.
The image shows a man driving a blue Passat car, which detectives believe to have been involved.
Mr McKeown, who was 54, was shot up to six times in broad daylight close to a petrol station in Waringstown on 19 August.
Detective Chief Inspector Peter Montgomery said it was a “cold and calculated murder”, and believe a number of people were involved.
“In every murder there are people involved in different aspects of the crime including planning, targeting, supplying weapons , transporting the weapons away from the scene and the clean-up operation,” he said.
The detective said the photograph shows a man who appears to be wearing a baseball cap driving into Dewarts Garage, shortly before the murder at around 7.19pm.
“I believe that the gunmen were alerted to Mr McKeown’s movements that night and they likely had knowledge that he would be at the petrol station at that specific time,” he said.
“The gunmen travelled in a dark blue VW Passat, registration RK62 PLX.
“It was first seen entering Dewarts Garage at 6.23pm. I believe the gunmen waited in it at the back of the filling station for around 56 minutes before shooting Mr McKeown.
“The CCTV shows the vehicle leaving Dewarts Garage at 7.19pm.”
Detective Chief Inspector Peter Montgomery wants anyone who saw the car or the people inside it during these times to come forward.
“The car was later found burnt out on the Glenavon Lane in Lurgan at approximately 7.26pm,” he went on.
“There was football training and trials ongoing nearby so there may be some parents who witnessed the Passat being set on fire.
“I am also still very interested in tracing a grey Volkswagen Golf S which was seen in the Greenhill Park area of Lurgan between 5pm and 7.30pm on the Monday evening.
“This vehicle left Greenhill Park and drove on to Mourne Road. Did you see this car? Did you see where it went?
“Anyone with any information can contact detectives on 101.”