[from occupied ga]

what could they have done differently?

Almost everything? I may be reiterating the obvious, BUT THE BOSTON STORM TROOPERS DIDN'T CATCH THE JERK WITH THEIR GESTAPO TACTICS. An ordinary guy found him about 15 minutes after the brown shirts let them out of their houses.

[Enterprise]

Doing everything differently literally means not even being on the scene searching for Joker. No search, no Joker.