No evidence, just speculation.
I think that because she would have been screaming, and fighting him harder, if she wasn't stunned somehow.
That is why before this knowledge, I thought that he may have been hiding in that gully, to surprise her and ambush.
I wouldn't have thought she wound have came that close to him, as Mocity thought too, but after reading his hood was up, that would have reasoned why he was parked there in her mind.
I think if she saw the back of his head sitting there with no phone against his ear through the back window, she would have crossed the road, if not turned around.
Again,that is knowing what we know now. There wasn't a murder in that town in 30 plus years before this, (excluding the Dentist that was found not guilty of killing his wife) so there was really no reason to believe someone would have been waiting for her, especially in broad daylight.