Larry Ray Mattis was 21 when he disappeared from High Prairie, Alberta. The disappearance is placed in 1968, but the exact date and the circumstances of his last known moments are not known.

The case is characterized by a scarcity of details and an absence of documented leads, and investigators at the time lacked modern forensic tools and digital networks that can help today.

This remains an unresolved disappearance with very few facts beyond his name, age, town, and the year associated with his vanishing. Does anyone remember Larry Ray Mattis, his family, or anything from High Prairie in 1968 that could help?