The Rock County Coroner's Office ruled Mary Coulthard's death a homicide last week, but Janesville police say they still don't know what happened to the 75-year-old, who was found dead in the Rock River last year.
The elderly Janesville woman whose body was found in the Rock River earlier this year died due to "homicidal violence," an official said Tuesday.
Janesville police are continuing to look for a missing woman, and have released a more recent photo of her.
