A 27-year-old man has been charged over the mysterious murder of a Queensland gem miner.
David Hanson, 71, was last seen alive by his daughter when the pair met for breakfast on February 22 2014, the same day he was due to return to Tanzania, where he had been living intermittently for a decade.
But he never arrived at the airport for his international flight and hasn't been seen since.
Detective Superintendent Dave Hutchinson on Monday confirmed a 27-year-old man had been charged with being an accessory after the fact to Mr Hanson's murder and interfering with his corpse.
He said the man, who was already in jail, is believed to be an associate of three other suspects who are all residing in Queensland.
Some of these other suspects have established links to outlaw motorcycle gangs but the motive for Mr Hanson's slaying remains unclear, Det Supt Hutchinson said.
It's possible he was killed after business or drug dealings went sour, or both, he said.
Detectives are confident the father of four was killed at a car detailing business on Timms Court in Woodridge, south of Brisbane.
Police believe his body - which has not been found - was then dismembered and disposed of.
Det Supt Hutchinson also appealed for anyone who recognised a grey 2003 Ford ute with the licence plate 922 QXC that was spotted around the time of Mr Hanson's disappearance, and hasn't been seen since, to come forward.
Mr Hanson worked and lived between Queensland and Tanzania, where he was trying to get a joint-venture gem mine off the ground with several investors.
The 27-year-old man will front court on December 16.
Investigations are ongoing.