They set up a perimeter and searched within the perimeter with dogs, helicopters, people, etc. The Joker was a block or so outside of the perimeter though.
He walked a half mile from the first shootout. Are you telling me a bloodhound couldn’t have followed the trail of a bleeding man that far?
As an old fan of the show "24" I have to chuckle every time I hear the word perimeter. It was turned into a drinking game on the Dave Barry "24" blog because they mentioned the word so much. And of course the CTU "perimeter" was more leaky than a faucet with no washer!