Mr Conlon was found near Keady in south Armagh
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Police investigating the murder of Martin Conlon in County Armagh have issued a fresh appeal for witnesses.
Mr Conlon, 35, from Railway Street in the city, was found shot at Farnaloy Road outside Keady on 7 November.
Detectives said he was abducted from a friend's house at Greenpark Crescent in Armagh. They want to trace three cars seen in the area at the time.
Police appealed for the owners of a dark coloured and a blue car seen in the Farnaloy Road area to contact them.
They also want to talk to the owner of a dark coloured vehicle seen in the Tullynawood area of Darkley, County Armagh at about 1530 GMT on the day of Mr Conlon's disappearance.
Detectives also appealed to any other motorists who may have travelled on the Farnaloy Road on the day or who witnessed any suspicious activity to contact them.
One man is still being questioned about the killing. Four people were released without charge on Friday.
Police have said a homophobic motive is a line of inquiry.
They are also looking at whether Mr Conlon was killed by dissident republicans, with whom he was linked.
Mr Conlon was released recently from prison in the Republic of Ireland where he had served a four-year sentence after being arrested at a Real IRA training camp.
Detectives returned to the scene of the shooting last Monday to stage a partial reconstruction in a bid to piece together the circumstances surrounding the murder and identify new witnesses.