So why doesn't he just kill The Joker? Read the article - http://whatculture.com/comics/10-problems-batman-nobody-wants-admit
10 Problems With Batman Nobody Wants To Admit
Superman/Batman: Public Enemies Part 6
Top 10 Worst Things Batman Has Ever Done
Superman (disguised as Batman) vs Bane
10 Little Known Superheroes That Could Make DC Millions
10 Most Inappropriate Batman Comics Storylines Ever
Batman's True Power
10 Things Marvel Doesn’t Want You To Know About “Ant-Man and the Wasp”