Patricia Anne Osborn, known as Patty, vanished from Seattle on the evening of October 20, 1983, at age 19. She was last seen near the 99 Motel in the 11500 block of Aurora Avenue after making plans to meet a man for a date at a nearby restaurant but never arrived. A biracial woman with black hair and hazel eyes, she stood five feet three inches and weighed about 125 pounds; she had a one-inch surgical scar on her pelvic bone region and sometimes used the names Tina Lusk and Pamela M. Osborne.

Investigators have long regarded foul play as likely. Patty’s disappearance has been linked to the Green River killings because many victims in that series were young women in high-risk situations; serial killer Gary Ridgway reportedly said he thought he might have killed her but could not recall details. Ridgway was never charged in her case and her body has never been found, so her fate remains unresolved.

Does anyone who knew Patty, saw her on Aurora Avenue that night, or has information about the aliases Tina Lusk or Pamela M. Osborne contact investigators?