Philippe Guerin was 27 when he disappeared from the Ontario Hospital, a psychiatric facility in North Bay, Ontario, on June 12, 1966. He was described as a Caucasian man, five feet seven inches tall, medium build, brown eyes, short brown hair, no upper teeth, and walking with a limp from polio contracted at age ten. His family had admitted him for aggressive behavior and other mental health concerns and later became alarmed after a visit in which his healthy teeth had apparently been removed.

The hospital did not notify police immediately, instead sending a letter to the Widdifield Police Department; Philippe’s brother was told at the hospital that Philippe was missing. A short-lived lead came when a clergyman reported picking up a hitchhiker matching Philippe’s description near Falconbridge in the Sudbury area; the man said he was heading to Sacré-Coeur, Québec and was dropped at the junction of Highways 17 and 11 south of North Bay, but police were unable to locate him. The North Bay Police Service continues to investigate and issued an age-progressed image in July 2024. If anyone knew Philippe, his movements in June 1966, or remembers seeing someone matching his description along Highways 17 or 11, please come forward with information.