Lachlan Griffiths was last seen alive in the Brisbane CBD on January 16, 2022 before his mother reported the 35-year-old missing on Australia Day that year.
Detectives believe Mr Griffiths was taken by car to the Coopers Plains depot but are yet to find his remains.
Billy Lee Bornstein, Filip Grbavac, David Lee Tan and Francescos Sebastian Giorgi were committed on Wednesday to face a murder trial over Mr Griffiths' death, following a two-day hearing in Brisbane Magistrates Court.
Hoa "Jack" Chanh told the court he heard banging from downstairs when he woke in a bedroom at the depot before sunrise on January 17.
Downstairs he saw Grbavac punch Mr Griffiths who was on the ground while Tan was in the same room doing nothing, Mr Chanh said.
The 30-year-old told the court he could see blood on Mr Griffiths' face and on Grbavac's fists and clothes.
"I was pretty shocked," he added.
After returning upstairs Mr Chanh said he heard one scream before leaving the warehouse where a trucking business operated.
Before the allege assault Mr Chanh was looking for Tan's wife after the couple had an argument, he told the court.
He said Tan was angry and intended to leave for Sydney.
Asked by defence counsel if he saw a fire in a drum at the depot on the day of the alleged assault, Mr Chanh said could barely remember what happened yesterday.
But he remembered the traumatic things he saw that night, he said.
Counsel for the men conceded at the end of the committal hearing on Wednesday there was a case for all four to answer.Â
Magistrate Ross Mack committed them to stand trial on a murder charge in the Brisbane Supreme Court on a date yet to be set.
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