There are several artists using the name Trigger:
These are photos from concerts where Trigger played, so they may be of other bands that played the concert as well.
The Iron Maidens / Envenomed / Trigger Jun 1, 2018 Richmond, Victoria, Australia Uploaded by Jimpotamus
The Godz / Cheap Trick / Trigger Jun 16, 1978 Cleveland, Ohio, United States Uploaded by Zimtrim