Paul Robert Hibbard, a 25-year-old geologist from Mead, Colorado, vanished on May 28, 1976, while on a routine exploration in Gillette, Wyoming. He worked for Berge Exploration and handled radioactive materials for geological testing; the truck he was driving contained about $30,000 worth of those materials and disappeared with him.

Shortly before his disappearance he received a suspicious call asking him to bring his specialized van to Gillette. After confirming with his boss that the call was a hoax, he continued working. In July 1976 a local man, Joseph O. Dowdy, was arrested with nearly $10,000 of Hibbard’s geological equipment and was later convicted of grand larceny, but Dowdy did not disclose Hibbard’s whereabouts.

An anonymous tip led investigators in August 1976 to Hibbard’s truck, found abandoned northwest of Upton, Wyoming, with blood inside. DNA testing was not available at the time, and despite investigation the case remains unsolved with foul play suspected. If anyone knew Paul, his work routes, or saw his truck in late May or early August 1976, please share what was seen or remembered.