Gotham Central, Book 2

Witness the gritty side of the Gotham City Police Department from their perspective, as they take on psychotic criminals like The Joker and grudgingly look to The Dark Knight for help.
This volume collects two cases of the Gotham Special Crimes Unit. First, The Joker terrorizes the city at Christmastime when he begins randomly executing people with a rifle, and no one from the Mayor on down is safe. A second story focuses on an old case and unfinished business for disgraced detective Harvey Bullock.