The deputy, Chester (played by Dennis Weaver), was good-hearted but he was nervous and excitable, and perhaps just a bit dim-witted. Description from classicwesterns.wordpress.com. I searched for this on bing.com/images
Chester, Kitty & Marshall Dillon..... GUNSMOKE! The first and most successful of the "adult Westerns," 'Gunsmoke' was a radio hit that was conceived as a TV show CBS hoped would star big-screen legend John Wayne. Wayne nixed the part, but recommended his pal James Arness, who would spend 20 seasons with Chester, Festus, Doc and Miss Kitty, playing Dodge City's pillar of law, order and Old West justice, Marshal Matt Dillon.
GUNSMOKE 1955-1975 Matt Dillon, Miss Kitty, Chester, Doc, Festus... Marshall Matt Dillon was responsible for bringing respect for the law to Dodge City. Cattle thieves, gunfighters and other bad guys had to seek out another place to get into trouble!
From the 12 May 1962 episode of Gunsmoke titled "Chester's Indian." Chester (Dennis Weaver) is coerced by Callie Dlil (Jena Engstrom) to care for the Indian (Eddie Little Sky) he shot, not knowing that the young woman was trying to help the Indian return to his village.