Detective Comics Vol. 1 (1937-2011; 2016-) #458

Plot

At a costume fund raiser, a man dressed as Batman dies in Bruce Wayne's arms; His cowl is removed, and he is identified as Lt. Bucky Dunlop; the words "The Real Batman Dies Next!" appear to have been tattooed on his forehead; Gordon is there, and orders all in attendance, including Bruce, to remain behind. "Peal of the Devil-Bell!": Britt Langstrom (Kirk's sister) finds Francine (Kirk's wife) strapped to a bed, and she frees her, but Francine changes into a humanoid bat. (mycomicshop.com)