Police Corruption in Gotham City

From 2000 to roughly 2009, it was something of a golden age for me in regards to the kinds of stories in the Batman universe that were being published. There were the Cassandra Cain Batgirl stories, obviously, but with Greg Rucka, Ed Brubaker and the like at the helm of the Bat Books, Gotham really began to shape itself up into being like an actual city, rather than being merely the backdrop where Batman punches bad guys. Stuff happened in the background when the superheroes and villains weren't present, and one of the best series in this regard was Rucka and Brubaker's Gotham Central.