Who Is "A" on Pretty Little Liars? Meet Our Top 12 Suspects

Why It's Possible:

• Most obviously, Mona was "A" once, and she could be "A" again. She still has the motive, and she definitely still has the crazy.
• In season four's Summer finale, she meets up with Shana, leading us to think she can't really be trusted.
• In this scene with Wren, Mona talks about loyalties and secrets, and it's hard not to detect that evil gleam in her eye.

Why It's Not Possible:

• Mona gets caught in the lodge fire with the rest of the girls. So, not only did Mona not start it, but she was put at serious risk of injury.
• Mona doesn't know who Red Coat is.
• It's clear that, while Mona was the original "A," someone has taken the game away from her and made her a puppet. This person, or "Uber A" can't be Mona too.