The uncle of missing RAF serviceman Corrie McKeague has questioned police efforts to find him.
Tony Wringe told Forces TV information is being withheld from the family in a 'cost-constrained' operation, and that some leads may not have been followed up.
The 23-year-old was last seen in the early hours of September 24 after a night out with friends in Bury St Edmunds.
He was reported missing when he failed to turn up at his base at RAF Honington.
His mother, Nicola Urquhart, is a police officer from Fife who has previously praised the investigation by Suffolk Police.
Police say they have not found any evidence of criminality.
Mr Wringe earlier wrote on Facebook: "Corrie's family is perhaps slightly unusual in their collective knowledge and backgrounds in police, intelligence and security. As a result, information has been identified or analysis conducted which the police have not had the capacity or capability to undertake, or perhaps have, but chosen not to communicate this with the family.
"As a result, there is a lack of trust towards the media management approach the police have employed to date, including coming out immediately after Corrie disappeared, emphatically claiming there was 'no third party involvement', clearly not a statement supported by the evidence then or now."
"It is our summary that Corrie has disappeared against his will, a third party is involved. There are numerous leads that have not been followed up and evidence that has not been effectively processed."
Suffolk Police has defended its investigation into the disappearance but admits it still doesn't have answers about Corrie's disappearance.
The force said its officers share the family's aim of finding the missing serviceman and said they have been carrying out an "extensive" investigation.
A spokesperson said: "Despite this work, media appeals and support from a variety of other groups and agencies who have been searching and assisting with the investigation, there are still no positive sightings of him after 3.25am on Saturday September 24 in Brentgovel Street in Bury St Edmunds.”
"To date a huge area has been searched, hundreds of hours of CCTV have been viewed and dozens of people have been traced and spoken to… Officers continue to look at - and investigate – all possibilities.”
"We are aware that we can't provide the answers that Corrie's family need, but police are continuing work to find Corrie."