Sebastien Lagace, 39, was last seen leaving the Domaine Orford treatment centre in Sherbrooke on foot on the evening of December 23, 2022. He was there under a court order and walked out carrying only a backpack. At the time he was reported missing he had not been heard from since a phone call to his parents on December 18, when he normally checked in about every two weeks.

Sebastien is described as white, slender, 5 feet 5 inches tall, about 161 pounds, with brown hair and brown eyes. He has tattoos on his right arm, left arm, and thighs. When last seen near Moore Street in Sherbrooke he wore a black coat and had a backpack. The Sûreté du Québec and the Service de police de Sherbrooke are involved, and an integrated missing persons and abductions team is coordinating the investigation. His family has expressed concern for his health and safety.

If anyone saw Sebastien after December 23, 2022, or knows where he might be, please contact the investigators with any information.