Batman
New Gotham: Volume 2: Officer Down

Batman must solve a mystery of an extremely personal nature: Who shot Commissioner James Gordon three times in the back? As one of his dearest friends lies close to death, the Dark Knight begins his investigation with the only eyewitness, Catwoman.

As Batman delves deeper into the mystery, he quickly learns that this is more than a simple whodunit. Enlisting the aid of Robin, Batgirl, Nightwing, Azarel, and Oracle, Batman discovers the true and shocking identity of the assailant and now must live up to his oath to bring him to justice.