Gunsmoke S13E03 - The Prodigal

A notorious outlaw was shot in the back, fatally, before Matt could arrest him. The large bounty on the man's head was never collected. Now a "crusading" newspaper reporter is trying to goad the dead man's two young sons into a showdown with Matt Dillon, who would have been legally enjoined from getting the bounty money because of his lawman status and thus is the main suspect in the shooting.