Edda Brigitte Tesche Kane, 44, of Mill Valley, California, was killed on August 19, 1979 while hiking alone in Mount Tamalpais State Park. Her husband reported her missing when she failed to return; her car was found in the park lot and her body was located the next day. Kane was found face down with a gunshot wound to the back of her head. The body position and wound led investigators to conclude she had been ambushed from behind and shot execution-style with a high-powered weapon. Her glasses, credit cards, and a small amount of cash were missing, but her jewelry was left behind, and the autopsy found no sexual assault.

Kane’s murder was later tied to a series of killings in the same area attributed to the Trailside Killer. Did anyone who knew Edda or frequented Mount Tamalpais around 1979 see anything unusual that day?