Without a witness, and without the car to reexamine, I don't believe any way forward with such a question. Maybe police might have photos of the wreck, but if they didn't see evidence of a ram or scrape back then, I'd doubt that they'd see one now. IMO
21 year old leaves Cottesloe late at night in 1988 only to be found rolled in a car not far from Swanbourne, Lakeside drive-in. In 1988 when someone else tried to run Cutler off the road for several kilometres up to Eric st, Stirling highway.
The 21 year olds car rolled in a place that would give her car maximum damage if run off the road. She was a waitress.
If the Cutler case is prosecuted and makes television, then someone might think it more based on the Cutler evidence.