In the Line of Duty (Gotham Central, Bk. 1)

Gotham City: a town teeming with corrupt cops, ruthless crime lords, petty thieves ... and just a small handful that would oppose them. Grizzled veteran Harvey Bullock, Captain Maggie Sawyer, detective Renee Montoya and the GCPD are the law force that stands between order and complete anarchy.  Gotham's Finest work around the clock to not only keep the world's most psychotic criminals off the street... but also cleaning up the mess left behind by Batman's one-man war on crime. 

Written by critically acclaimed authors Ed Brubaker (Captain America) and Greg Rucka (52, DETECTIVE COMICS), this Eisner Award-winning series follows the detectives of Gotham City's Special Crimes Unit as they navigate the against the city's greatest villains -- in the shadow of Batman himself. Collects issues #1-10.