Bruce Neal Walls, 29, was last seen in West Palm Beach, Florida, on September 5, 1980. A successful diamond merchant, Walls had been visiting family and attending a friend’s wedding and told a colleague he planned to sell gemstones to a buyer in West Palm Beach. He was driving a rented red or maroon 1980 Mercury Cougar that day.

The Cougar was recovered abandoned at the Fort Pierce Service Plaza on the Florida Turnpike with the keys in the ignition and no obvious signs of violence, but it had been driven an unexplained 500 miles. A briefcase reportedly containing more than $100,000 worth of diamonds and precious stones was missing. Walls owned multiple properties in Florida, Hawaii, and South America and was described as a responsible businessman.

Investigators have not reached a definitive conclusion, though they consider a robbery-related disappearance possible and the case remains unsolved. If anyone knew Bruce, saw him around West Palm Beach on September 5, 1980, or has information about the rented Cougar or the missing briefcase, please share what is known.