Nightwing (1996-2009) #53

"Officer Down" part 6, continued from CATWOMAN #90. Oracle and Nightwing take the investigation into a new direction, but finding the answers may unleash in these heroes a darker aspect of themselves then they've ever faced before. And when the truth behind Gordon's assailant is revealed, Oracle ponders taking justice into her own hands! Continued in DETECTIVE COMICS #754.