The mother of missing airman Corrie McKeague believes CCTV footage shows him leaving the area he was last seen on foot, contrary to the police theory he was taken away in a bin lorry.
Nicola Urquhart wrote in a lengthy Facebook post her son “is not in the landfill, and never was”.
Corrie, of Dunfermline, Fife, was 23 when he vanished on a night out in Bury St Edmunds, Suffolk, on September 24 2016.
“We have been shown CCTV of people in the area … just after Corrie walked in there,” his mother wrote.
“All are wearing dark clothing. You then see them leaving the area and one is clearly wearing white or very light-coloured trousers.
“I believe this is Corrie. These people leave the area … immediately after the bin lorry left.”
Ms Urquhart said she “only saw this footage on our last meeting with Suffolk Police”.
She added it is “possible Corrie left on foot and is AWOL” but she has “never believed this is probable, Corrie made no plans, had no reason and has never been seen after the immediate sightings”.
Corrie was stationed at RAF Honington, around 10 miles from Bury St Edmunds.
His mother said she has searched along the A134, a road which runs out of Bury St Edmunds, herself.
“I will continue to do all I can to make sure it is searched and my son is found,” she said.
“I will not give up, neither will Corrie’s brothers or our family.”
He said he accepted his son is “gone” but Ms Urquhart questioned data about the bin weight.
A Suffolk Police spokesman said: “The most likely scenario is that Corrie McKeague unfortunately went into the bin which was emptied into the Biffa lorry and consequently ended up in the waste process.
“We have come to this conclusion based on all of the evidence we have available to us, and not just the weight of the bin.”
The spokesman added the force has “sought to be as open and transparent as possible with the family” and a review by an outside force agreed its “preferred hypothesis of what happened to Corrie was the most likely one given the evidence available”.
He said: “Suffolk Constabulary has previously stated that unless new, realistic and credible information becomes available then the investigation is complete.
“There is no information available at this time that changes the status of the investigation.”