Monica Marie Cardinal was 46 when she was last seen in Edmonton, Alberta, in June 1993. Witnesses placed her leaving a downtown hotel, identified in some reports as the International Hotel, in the company of a man who has never been identified. After she walked out of the hotel her whereabouts became unknown.

At the time she went missing she was about 5 feet 6 inches tall, 145 pounds, with dark brown hair, brown eyes and a scar on her left arm. She is identified as an Aboriginal woman; no further tribal information or public photograph has been provided. Her case was not reported to police until February 1997, nearly four years after she vanished.

If anyone knew Monica, the man seen with her that day, or remembers seeing her in Edmonton in June 1993, please come forward with information.