There are more than two bands under the name Rigor Mortis:
These are photos from concerts where Rigor Mortis played, so they may be of other bands that played the concert as well.
Ozzfest 2008 Aug 9, 2008 Dallas, Texas, United States Uploaded by Alex Comeaux
Ozzfest 2008 Aug 9, 2008 Dallas, Texas, United States Uploaded by Arestus
