For a Few Dollars More ending / spoiler
Indio forces Col. Mortimer to fight a duel at a disadvantage but Joe shows up and forces Indio to play fair. Joe watches and Mortimer kills Indio. The woman from Indio's past (who killed herself) is Mortimer's sister. Mortimer lets Joe keep the bounty on Indio and his bandits. As Joe counts his winnings, and seems to be a bit short, Groggy crawls near him and tries to shoot him. Joe nonchalantly turns around and kills him.
Submitted by JJ Lison
