Death at Mount Anne 1974

On February 5th, 1974, Rosemary Young fell to her death near Mount Lot whilst hiking the Mount Anne circuit. We're working on a 50 year commemorative hike and subsequent documentary with Rosemary's younger brother, for next year. I'm trying to find some info on the accident but not having much luck. Does anyone on here remember it? Or perhaps know someone who might. I assume there would be police reports and various other archival info available but have no idea where to look.