Who Is the Vampire Diaries Mystery Shooter?

Lily is the most obvious candidate, but if she's so obvious, why not just show her? We already know she has a beef with her sons (probably that they kill Julian eventually), so it doesn't make sense to keep her identity a mystery.

Another likely candidate. She seems like she could snap at any moment, and with Julian back on the scene, she may be targeted by him and then go off the rails.

It could easily be one of the heretic couple from hell. Nora makes sense because she seems to be just a tad more evil than her girlfriend.

Mary Louise seems insecure enough to go crazy if Nora dumps her — or anything else. These women are pretty unhinged.