The wrongfully accused are set free, and the bad guys get their due. But physical fights (and murder) are often used to solve differences. And Matlock and his associates occasionally lie and trick people to get the information they need for their cases.
Murder victims are shown bleeding from bullet, knife, and blunt-object injuries (but pretty tame compared to today's forensic crime dramas). Occasional vague scenes of the murder taking place. Kidnappings and fistfights are common.
Some kissing, a few post-sex scenes in bed (with no nudity), women in skimpy outfits, occasional strip bar scenes with dancers in bras and thongs, implications of sexual attraction.