I'm thinking Melissa. I think it's too obvious for it to be Ian or Jenna and I can't really see it being anyone else. I'm thinking the video showing Ian and ali, maybe Melissa caught them somehow and got really mad and killed her, who knows.
im not sure too many r looking guilty of being A, if i had to pick one it would be Ian, there rest on my list are jenna and mona, ive read the books but i dont think they r actually going to use that A, they havent really followed the book so i think A could be completely different, wherever the story takes them i guess, which is good :) im enjoying the tv show mais than the books with all the new characters :)
I'm thinking it could be Emily's dad or Aria's brother, Mike..I know they're nice people, but I really think A wouldn't be obvious that it is A. I don't think the show would risk giving obvious signs of A's identity if they're planning to extend the show.
To me I would consider them checking on Ezra I mean aria tells him everything practically, but for sure I really don't think its jenna, nor toby. And not even ian because lol on Ian if you didn't catch the spring finale he's dead. From bieng pushed of the ledge in the church, and having his neck caught por the ropes to the church bell. Really it can't be jenna cause she seems like a clueless girl, and in the spring finale how jenna reacted to them having them seen her practically put forcing herself on Toby poor kid lol, and Toby of course not the segundo to last and spring finale and practically for the whole segundo season Toby and Spencer have been madly in amor so yah Toby was helping spence when she asked him to keep jenna busy. But those are my thoughts on this whole A theory...