Roger Glen Carlson, 32, of Sausalito, California, was last seen on January 1, 1972. His car was found parked in the north lot of the Golden Gate Bridge that day and a note reportedly found in the vehicle suggested an intention to jump, but no witnesses saw him and his body was never recovered.

Carlson was not reported missing until 2008, decades after he disappeared, a delay that has added to the case’s mystery. Investigators considered that he might have perished in the bay; over the years a few discussions have linked unidentified remains found in the area to him, but none have been conclusively tied to Carlson.

The case remains officially unsolved and is open in missing persons databases. If anyone saw Roger around the Golden Gate Bridge on January 1, 1972, or has information that could help resolve what happened, please come forward.