So, you have your Inquisitor of whose catch phrases include "heh, violence solves everything" (usually said when escaping trapped chambers) encounters a room filled with blood, bodies, and skulls (not uncommon in the Imperium it seems). "Ah, a symbol of Khorne" , he observes, "we must discover who is behind this." Then we encounter enemies of whom you murder them all, as you do. "The Cult of Khorne must be behind this" says he. WELL beslubberING HELL, this must be why you're an Inquisitor what with all these INVESTIGATIVE SKILLS you possess.
What a guy.