Brave And The Bold #177 August, 1981.

The Hangman's Club is a charity organization that helps find jobs for ex-criminals and when the chairman of the organization is killed by hanging, Batman and Elongated Man team-up to find the "Hangman". The heroes keep track of the criminal using the clues they find at the crime scene, but the killer is always one step ahead and he manages to claim two more victims who were benefited from the Hangman's Club.