evil Sherlock and/or John recs?

[nejem.livejournal.com]

I just read this fic (And the seventh one has drownéd thee by gayalondiel), a delightfully creepy story loosely based on the tale of Bluebeard and I realized: I need more grim and sinister fanfic in my life.

I ask for fic recs: any and all stories in which Sherlock and/or John is a murderer, a serial killer, has crazy split personalities or is just simply downright creepy.
Any 'verse, any rating, any other additional character, any pairing, slashy or not, with or without supernatural elements, anything at all (and I mean anything).
If you rec me creepiness of the Lestrade and/or Mycroft and/or Moriarty kind you will get my eternal love. And cookies.

Just give me creepy stuff! :D

Thank you in advance!