The mother of missing Mandurah teenager Hayley Dodd has arrived in court for the first day of her alleged murderer's trial.
The judge alone trial is underway for convicted rapist Francis John Wark who has denied killing the 17-year-old girl.
The 61-year-old argued he could not have a fair jury trial because of publicity surrounding his case.
Hayley Dodd was last seen alive walking along a road near Badgingarra in the Wheatbelt in 1999.
Wark lived nearby at the time, and was extradited to WA in 2015 from Queensland where he was serving time for a series of sexual assaults against a woman in 2007.
Hayley's mother Margaret Dodd arrived in court on Monday morning.
Her daughter's body has not been found.