John Casper, 53, was last seen in Salt Lake City, Utah, on May 18, 2004, while traveling through the city. Few details are available about his exact location or activities that day; authorities noted he often traveled through multiple states and may have been en route to Arizona when he vanished. He was described as of average build and had no known medical or psychological condition to explain a sudden disappearance.

Despite being missing for many years, the case remains open and no significant leads have been reported. The Salt Lake City Police Department continues to seek information that could clarify where he went or who he was with. If anyone saw John Casper around May 18, 2004, or has information about his travels through Utah or Arizona, please come forward.