Queensland police have charged two men with murder over the death of North Queensland man Andrew Walsh, whose body was found buried in concrete at a Brisbane transport depot earlier this year.
The 35-year-old was reported missing by family in January but was last seen alive at Slacks Creek, south of Brisbane, in November 2021.
Police found his body in a concrete slab at the business on Musgrave Road at Coopers Plains, in Brisbane's south, after a three-week excavation in March.
Twenty-eight-year-old Dewald De Klerk and 24-year-old Joshua Searston were today charged with one count each of murder and misconduct with a corpse over Mr Walsh's death.
Mr De Klerk was already charged with accessory after the fact in relation to Mr Walsh's death.
Before Thursday, four other people had been charged with accessory after the fact to murder and misconduct of a corpse over Mr Walsh's death.
Police believe Mr Walsh's death is related to the suspected murder of 35-year-old Indooroopilly man Lachlan Griffiths.
Detectives launched Taskforce Voltron after a joint investigation between the Homicide Investigation Unit, Indooroopilly and Logan Criminal Investigation branches linked the Coopers Plains business to the disappearance of both men.
Mr Griffiths, who was last known to be living out of various Brisbane hotels, was reported missing on Australia Day this year.
His body has never been found, but police have previously charged four people with murder in relation to his disappearance.
Detective Inspector Damien Hansen said Mr Griffiths and Mr Walsh had both visited the Coopers Plains transport depot before they disappeared.
"The investigation established that both these missing persons were last seen or had an association with the business," Detective Inspector Hansen said.
"We executed a crime scene there and Mr Walsh's remains were located at that address, that was a separate investigation at the time.
"This has been one of the most complex investigations that I've been involved in.
"It's been [an] enormous amount of work done by our intel, our investigatiors, hundreds of lines of inquiries [have been] taken both here and interstate."
Police are continuing to appeal for anyone with information into the disappearances of both men to come forward, particularly anyone who knows the whereabouts of Mr Walsh's 2005 grey Volkswagen hatchback which has not been located.
Mr De Klerk and Mr Searston had their matters briefly heard in Brisbane Magistrates Court today.
They will remain in custody with their cases scheduled to be heard again next month.
