It is feared the 33-year-old may have been there for a number of days.
The man's body was found on the Tullynamullan Road on Tuesday morning by police after he was reported missing on Sunday.
His death is not being treated as suspicious.
Police have now confirmed that an abandoned car was recovered on the same stretch of country lane after it was reported on 7 February, around six days earlier.
They said when they were made aware of the car by neighbours and that they tried to locate the owner but were unsuccessful.
A statement from the PSNI explained: "Attempts were made to locate the owner, at the address detailed on registration documentation.
"The vehicle was subsequently recovered by police."
Neighbours said they were only alerted to the vehicle because it was parked in the middle of the road blocking anyone getting past.
One local woman told UTV she was "shocked" to think there had been a body there.
She said: "I'm really annoyed because I'd been up that road on Monday on my bicycle and to think that some chap was lying there has really annoyed me."
TUV leader Jim Allister said there are questions to be answered.
"There would appear to be a number of questions here which arise," said the MLA.
"Whereas we don't know all the facts, if it turns out the find of the body was linked to the find of the car at this location as far back as Thursday, and the body not found until Tuesday, then there's the obvious question of how that could be."
Police said the incident has been referred to the Ombudsman.