Donald Alexander Macgregor, 44, of Ontario, Canada, was last seen in Miami, Florida, on May 7, 1973, while on vacation with his wife. He reportedly left Miami that day for a business trip to Panama City, Florida and was expected to be away about six weeks but never returned. He is described as a white male, 5 feet 10 inches, 169 pounds, with brown hair and brown eyes, a scar on the bridge of his nose and wearing dentures.

After a lengthy period without contact he was reported missing on July 7, 1973. Few details are available about what happened after his departure; the Ontario Provincial Police are handling the investigation and his case remains unsolved. If anyone knew Donald, his travel plans in Florida in May 1973, or has information that could help, please come forward.