WTF is wrong with people??

Girl finds missing dog's head in box on doorstep: "Two weeks ago, a gift-wrapped box was left at the house Crystal shares with her grandmother. The box had batteries on top, and a note that said 'Congratulations Crystal. This side up. Batteries included.' Crystal opened the box and found her dog's head inside. The box also contained Valentine's Day candy."

I know there are a lot of horrible acts perpetrated against people and animals every day, many more horrible than this, but Jesus! What kind of sick, twisted freak would do something like that?