Mackenzie Keith John De Vos was 20 when he vanished from the Ottawa, Ontario area. No precise account of his last confirmed movements, where he was staying, or who he might have been with has been publicly released.

At the time he disappeared Mackenzie was described as White, brown hair, blue eyes, about 5 feet 11 inches tall, and 139 pounds with a slender build. Investigators checked passport, Ontario Ministry of Transportation and Ontario Health Insurance Plan records but found no activity that located him. The case is handled under Belleville Police Service reference DEV-BE18010721 and national reference 2018040111.