Who Is "A"? Our Prime Suspect List

Why it's possible:

• Lucas is back in Rosewood, so he could easily be in on any and all dirty business.
• Lucas has always been a little on the weird and creepy side, plus he's admittedly interested in photography.
• He's shown before that he's obsessed with Hanna. Would he try to get the other girls out of the way to get close to her?
• He's been on the "A" team before! Mona blackmailed him into joining.

Why it's not:

• Lucas was attacked by "A" in season two, just outside Spencer's lake house.
• He leaves Rosewood High because he's afraid for his safety. He's been homeschooled ever since.
• He may be a little weird, but he doesn't seem like he has what it takes to pull off something like this.

Source: ABC Family