Deane David Brown, who sometimes went by David, was 43 when he disappeared after being dropped off in a parking lot in the 300 block of East South Temple in Salt Lake City on October 30, 1986. He wore a light blue business suit and was never seen or heard from again. Descriptions list him as a White male with brown hair and blue eyes, variously reported between 6 feet 0 inches and 6 feet 3 inches and weighing 195 to 210 pounds; some reports give a much taller height range of 6 feet 6 inches to 6 feet 9 inches.

His vehicle was later found abandoned at the Salt Lake City International Airport, but that discovery did not generate further leads. The Salt Lake City Police Department lists the case as an active missing person investigation and his information appears in national databases under NamUs MP5643. DNA from family members has been submitted to assist identification efforts. Few other details have been released, leaving key questions about what happened after he was dropped off unanswered.

If anyone remembers seeing Deane in Salt Lake City around October 30, 1986, or has information about his car at the airport, please share what is known.