Batman: Gotham Knights #30 (2002)

Bruce Wayne: Fugitive - Turnabout Part 1 / Punchline
Recently learning that he has a blood condition that threatens his life, Jean-Paul Valley is very close to the edge. But when he learns that Bruce Wayne is accused of murder, and sees Batman doing nothing to clear his name, it drives him over the edge. Once more donning his Batman armor, he races to confront the man who told him that murder was wrong.
Release Date: 2002