The skull of a victim of the Green River killer was found by a hiker in a wooded area off highway 18 near Issaquah Sunday afternoon.
It appears the skull had been recently moved to the area, according to the King County sheriff's office.
Detectives have believed that whoever found the skull originally could lead authorities to other evidence of crimes by the Green River killer, Gary Ridgway, who left victims in close proximity to one another.
The person who found the skull Sunday, a 45-year-old man from Startup, discovered it off an old logging road near Tiger Mountain. No other bones were found.
Investigators with the King County Medical Examiner's office used dental records to positively identify the skull as that of Tracy Winston.