Police are seeking information about a crash in Chidlow in which a 32-year-old woman was killed.
The woman was driving a white Toyota Camry sedan west along Great Eastern Highway when she lost control after veering on to the gravel shoulder shortly after midnight on December 19.
Her car rolled a number of times and she suffered serious head injuries.
The 32-year-old was taken to Royal Perth Hospital but died the next day.
Anyone who witnessed the crash is asked to contact Crime Stoppers on 1800 333 000.