Two people charged with the murder of Dubbo man Alois Rez will appear in court today as police seek information about a distinctive vehicle.
Detectives believe the black Great Wall station wagon is important to their continuing homicide investigation.
Yesterday they appealed to the public to report any recollection of the car in the week from July 28, when Mr Rez was last seen at his Alfred Street home.
"The vehicle is a Great Wall station wagon, black in colour with a tow ball, silver roof rack, fog lights, and yellow and black number plates," Detective Sergeant Scott Baker said.
"If anyone sighted this vehicle in Dubbo or surrounding areas from Sunday July 28 until Saturday August 3, please call Crime Stoppers or Dubbo detectives."
The appeal capped off a weekend of intensive police work, which included murder charges being laid against a 51-year-old man and a 24-year-old woman on Saturday.
The accused were both formally refused bail and remanded in custody to reappear at Dubbo Local Court today.
Mr Rez, 33, was reported missing to police on August 1.
Officers were told he was last seen about 10.30pm on July 28 at his home.
The State Crime Command's Homicide Squad was called to assist local detectives in their investigation into the disappearance because it was considered out of character for Mr Rez to be missing for such a period of time.
Detectives and an earthmoving contractor had been deployed at a rural property on the outskirts of Dubbo on Friday as police expressed fears Mr Rez, 33, had "met with foul play".
During searches of three locations - the Sappa Bulga property as well as houses in Alfred and Fitzroy streets - police seized two vehicles and conducted extensive forensic examinations.
After they made the two arrests on Saturday, they returned to the Alfred Street scene to conduct further testing yesterday.
Detective Sergeant Baker urged anyone with information about the car or anything relevant to the investigation to call Dubbo police or Crime Stoppers on 1800 333 000 or use the Crime Stoppers online reporting page.
Information will be treated in the strictest of confidence.
Police reminded people they should not report crime information via police Facebook and Twitter pages.