Siew Fong Oei, 23, vanished from Toronto in the early summer of 1981. She was last seen leaving her apartment on June 24; family members never heard from her again. The disappearance is described as abrupt and unexplained, and the investigation remains open as a cold case.

Official descriptions list her as Asian, slender, about 5 feet 2 inches and 99 pounds, with long straight black hair and brown eyes. On the day she disappeared she was reportedly wearing blue jeans, a white shirt, blue running shoes and carrying a brown leather purse. Those items are the last confirmed traces of her before she went missing.

There is little public information about leads or sightings, and the circumstances of her disappearance are not detailed beyond the last confirmed movements from her apartment. Anyone who knew Siew Fong Oei, saw her on or after June 24, 1981, or has information relevant to her disappearance is asked to come forward.