Batman #508 (1940)
KnightQuest: The Crusade' nears its conclusion as the Batman/Azrael saga reaches a major turning point. Jean-Paul Valley steps way over the line in his role as Batman by committing an act that cannot be undone, and which costs the life of an innocent. Continued in Batman Shadow of the Bat (1992) #28. Written by Doug Moench, with art by Mike Manley and Joe Rubinstein. Cover by Kelley Jones.