Archie James Nugent, a 49-year-old White rancher, was found dead near the Musselshell River in Sumatra, Montana on October 31, 1967. Investigators determined he had been killed by a single gunshot wound to the head. No immediate witnesses or clear motive were reported at the time, and the discovery shocked the small ranching community.

The investigation later focused on a man known to Nugent, Robert Swan (reported as Bob Swan), who was arrested and charged with first-degree murder. Reports say Swan confessed and provided details that matched the scene, though the exact reason the encounter turned fatal is described as unclear.

Anyone who knew Nugent, his movements that October, or his acquaintance with Robert Swan is asked to come forward with information.