Teen Set Out to Travel the World—Then Vanished

Murder Files Unsealed · Mar 28, 2026 · 36m · transcript

These sources recount the fifty-one-year mystery of Mark Smith, a nineteen-year-old from Billings, Montana, who vanished in 1974 after leaving home to travel. His partial skeletal remains were discovered by a logging crew in remote Oregon in 1978, but a forensic error originally led investigators to misidentify the body as a young female. For decades, the case remained cold until modern DNA technology and forensic genetic genealogy allowed scientists to correct the sex of the remains and locate Smith’s living relatives. The identification was finally confirmed in early 2026, providing his…