Sylvia Ann Guiboche was 20 and pregnant when she was last seen in Winnipeg on June 13, 2003. A mother to a young daughter named Tina, Sylvia had moved from Swan River to Winnipeg five months earlier to escape an abusive relationship. She was due in September and had been described by family as devoted to her child.

On the evening she vanished a cousin and a friend visited her apartment; Sylvia declined to go out, saying she was waiting for a male friend. She had been known to frequent the Sargent and Ellice Avenue area. Sylvia was reported missing by family in October 2003 after they went an unusually long time without hearing from her. She was described as 5 feet 3 inches to 5 feet 5 inches, about 121 pounds, with black hair, brown eyes and a scar on her right arm and shoulder.

Project Devote took over the investigation in July 2012. Family members, including her sister Nicole, believe her disappearance was connected to a drug debt; years later the case is cold and unresolved. If anyone knew Sylvia, her routines, contacts in Winnipeg or the Sargent and Ellice area in 2003, please come forward with information.