Alec Pannall was sat in the back of a car after a night out in Claremont when his friend in the front passenger seat piped up.
"Have a look at her," he said.
All three men turned to gawk at the young woman waiting on the corner of Stirling Street and Stirling Highway.
She was thin and looked to be in her 20s, and she was leaning against a telecommunications inspection pole with her arms crossed.
Standing in front of the Body Club, Mr Pannall said his attention was only drawn to the petite blonde on the side of the road due to his friend pointing her out - and in the 15 to 20 seconds the lights from Stirling Road to Stirling Highway stayed red, they watched her wait for someone.
Then, their car pulled away.
Mr Pannall's sighting of Sarah would have only been a few minutes before Swan Taxis driver Jaroslav Krupnik accepted a job from a young woman who identified herself only as "Spiers".
The job was likely to be quick for Mr Krupnik, who frequented the Cottesloe and Claremont area on weekend nights, with the woman asking to be pick up from the corner of Stirling Highway and Stirling Street and to be dropped in Mosman Park.
Mr Krupnik received the job at 2.06am while he was driving from Cottesloe to Claremont, and he arrived at the corner where the woman was supposedly waiting for him just three minutes later.
All Mr Krupnik could see was an empty phone box and a quiet, dark street.
"There was nothing there. There was a telephone box… but that was all, there was nothing," he said.
He confessed he didn't look particularly hard for the customer, and drove on to Bay View Terrace.
"I didn’t see anybody so I kept going," he said.
About five minutes later Mr Krupnik instead picked up a group of friends who had been searching for a taxi after their own night out in Claremont.
By coincidence one of the passengers, Chelsea Palmer, was a friend of Sarah's, and as Mr Krupnik pulled his taxi back out onto Stirling Highway, the street corner remained dark and empty.
There was no sign of Sarah.
Mr Krupnik instead took his new group of passengers to their own intended destination - also Mosman Park.
Mr Krupnik said he had a specific recollection as to where he dropped the group off in the early hours of January 27: "I took them to Monument Street on Mosman Park. Third house from the corner of Wellington Street."
When asked by defence counsel Paul Yovich if he remembered anything amiss when he dropped them off, Mr Krupnik said no.
But in the early hours of the morning, four witnesses would hear a woman's screams echoing up the street.
One would see a white station wagon parked the wrong way on the street, and another would hear a car door slam and the car speed off.
Bradley Robert Edwards has pleaded not guilty to the murders of Sarah Spiers, Jane Rimmer and Ciara Glennon.