Bertrand Detonnac was 23 when he disappeared from New York City on March 5, 1985. He was described as a Caucasian man with black hair, brown eyes and a mustache, about five feet seven inches tall and 120 pounds, with a slender build. He was last seen wearing a blue down overcoat, a brown jacket, a white t-shirt, blue trousers and black sneakers.

The case remains open, and little else is publicly detailed about his last movements or possible leads.

If anyone knew Bertrand, saw him around March 5, 1985, or has information that could help resolve his disappearance, please come forward.