Little Shift

Stop with the dead bodies already. One-ew. Two-I'm so not qualified for this.
I was supposed to be shadowing my boss on an easy peasy magical drug bust.
But, with my flucking luck, I stumble right over the body of a drug dealer.
This witch took advantage of mixed breed shifters-stealing magic. Not a good look in a town full of supernaturals.
Plus, she hurt a dragon. Now, my chief isn't just ticked, he's incensed.
I'm in way over my head, but I only realize how deep the water is when I figure out the killer uses hexes-magical equations.
I hate murder.
But I might hate math even more.
How do I solve this calculating, murdiferous case?
Ask the world's hottest vampire for help.