Yves Guerin was 27 when he was last seen leaving his Montreal residence on January 7, 1991. He vanished after that departure and has not been heard from since. At the time he disappeared he was described as a white man with a light to fair complexion, blonde hair, brown eyes, crooked teeth, 168 cm tall and about 58 kg.

Very little public information exists about the circumstances of his leaving or the search efforts that followed. The available details are limited to his last known date and basic physical descriptors, leaving many unanswered questions about what happened after he walked away from home.