When Did Arvo Ojala Die?

Arvo Oswald Ojala was a Hollywood technical advisor on the subject of quick-draw with a revolver. He also worked as an actor; his most famous role was that of the unnamed man shot by Marshal Matt Dillon in the opening sequences of the long-running television series Gunsmoke. As a joke on the producers, James Arness and Arvo actually did the opener once with Dillon falling to the ground.