On the evening of Friday, September 27, 1963, six-year-old Diane Carrier left her home on rue du Porche in the Place Royale area of Quebec to fetch her older brother Adolphe, who was playing nearby. Adolphe returned home shortly afterward without Diane and the family discovered she was missing; a police report was filed at about 5:45 p.m. Her parents and neighbors searched the neighborhood, the forbidden wharfs, Petit Champlain and the schoolyard, but no trace of Diane was ever found.

Over the years the family, including Diane’s mother Gabrielle and her brothers, pursued every possible lead. DNA samples were later collected from her mother and two brothers. Theories considered have included an accidental fall into the St. Lawrence River, abduction by a predator, or being taken by tourists, but none of those possibilities has been substantiated with evidence.

Anyone who remembers the Place Royale area around September 27, 1963, or who has information about Diane’s disappearance is asked to come forward.