Five months after NSW detectives sent excavators to dig up a rural property on the outskirts of Sydney looking for possible human remains of gangster Raphael Joseph, a $1 million reward is being offered for information about his suspected murder.
NSW Police say 37-year-old Joseph was probably murdered four years ago by fellow drug dealers in a botched attempt to extract money from the international crime figure.
He was last seen in March 2014 getting into a silver Commodore at McDonald's in Auburn.
For several days in February, search crews, including the riot and bomb squads, combed a Putty Road property at Blaxland Ridge where Joseph's body could be buried.
Homicide detectives have previously said they know the identities of several people involved in the murder and the suspects should "expect a visit" in the near future.
Police have also recovered the silver Commodore along with a white Toyota HiAce believed to have been used to transport Joseph's body.
Six years before his disappearance, Joseph had been extradited from the United States over his suspected role in a fatal shooting in 2002 which sparked a wave of crime in the city's southwest.
Police will release details of the reward on Wednesday.