Police have declared as non-suspicious the death of 41-year-old Allyson Holloway, whose body was found at Mundaring Weir on Monday.
On Wednesday police had appealed for help from the public in piecing together the final movements of Ms Holloway, who had last been seen in Fremantle on Sunday evening.
Police were concerned that her body may have been taken to Mundaring Weir, where it was found floating in a catchment area by two four-wheel drivers.
But On Thursday afternoon, after speaking to several people who had contact with Ms Holloway in her final days, investigators compiled a timeline of her movements on Sunday.
The death has been determined as non-suspicious but police will prepare a report for the coroner.