Gunsmoke (1955)

S11E7 The Bounty Hunter

Lured back into the game with the offer of a piece of land, a seasoned bounty hunter is directed by his employer to track down the individual responsible for his son's death. Unbeknownst to the hunter, his boss has quietly rescinded both the bounty and the charges against the target, leaving him unaware of the true stakes involved in the hunt.