There are, at least, three band named The Hangmen
These are photos from concerts where The Hangmen played, so they may be of other bands that played the concert as well.
Social Distortion / The Hangmen Jun 15, 2002 Cincinnati, Ohio, United States Uploaded by Bwillie
Social Distortion / The Hangmen Jun 13, 2002 Columbus, Ohio, United States Uploaded by J Phillips