Patricia ’Patti’ Ann Leblanc was 15 when she ran away from a DSHS youth shelter during a group outing at Seattle Center on August 12, 1983. At the time she had been in state custody and had been arrested on a prostitution charge four days earlier. She was described as having brown hair, blue eyes, a double set of bottom teeth, and was last seen wearing a pink sweater and blue jeans.

Patricia was a chronic runaway but had previously kept in touch with a former foster mother, a fact that family and investigators noted. Initially handled as a runaway by Seattle Police, the case was moved to the Green River Task Force in 1985 because of concerns about a serial killer targeting vulnerable women. Investigators later listed her as a possible victim of Gary Ridgway, but no confession or recovered remains have established a definitive link.

The disappearance remains unsolved and is classified as a non-family abduction where foul play is suspected. Anyone who knew Patricia or has information about her whereabouts in August 1983 is asked to come forward.