Police are forensically testing a car seized as part of the investigation into the Claremont serial killings.

Police believe the 21-year-old VS model may have been used by accused killer Bradley Robert Edwards as he travelled around for work as a Telstra technician during 1996 and 1997, reports PerthNow.

Mr Edwards has been charged with the murders of Jane Rimmer in 1996 and Ciara Glennon in 1997, who both disappeared from the Perth suburbs of Claremont, and over two sexual assaults in Perth in 1988 and 1995.

It’s understood the car was seized from its current owner in December, on the same day the 48-year-old was arrested at his home in Kewdale.

Detectives had been working to identify car upholstery fibres found on the remains of Ms Rimmer in July 1996, which led police to believe the killer drove a VS Commodore made in the mid-1990s.

Ms Glennon vanished nine months later, and was reportedly last seen leaning into the passenger window of a light-coloured station wagon.

Mr Edwards has been remanded in custody and will next face court on January 11.

News.com.au has contacted Western Australia Police for comment.

Bradley Edwards has been charged with two murders. Picture: SuppliedSource:Supplied