I am liking the detail you put into this. The guy's shirt, head, and the shadow surrounding the character to make him stand out are very good, but the shoes and pants seem to lack this detail (the background also lacks even minimal details. Just a few pencil marks could have done so much). The concept of seeing an execution from the shooter's point of view is very cool. Keep up the good work!
(Let me know if you need a songwriter for your band)