On March 22, 1995, partial remains were found in a riverbed off Highway 129 east of Rogge Lane. All investigators could determine from DNA testing was that the remains were from an unknown female.
Her identity was a mystery for decades before her case was re-examined in 2019 when her remains were sent for more forensic testing, including carbon dating.
In my rush to understand "Which river?" I forgot the date. My rainfall data only goes back to 2000.