"I would be tempted to go more for the over steered for the speed and ploughed straight into cyclist than spin. If she had over corrected on the way back in which would have sent the back out andspun i woud lexpect the parked car to have been totaled instead. "
It appears when they recovered Ms Riches body it wasn't clear if she was walking or riding the bike. Sorry for using her name and personalising it, easy mistake.