'Pretty Little Liars' Fan Theory: Why Was Paige in a Hurry to Leave Rosewood?

Alison is behind bars for murdering Mona in "Pretty Little Liars," and although none of her friends believe her to be innocent, fans have been more trusting of the character.

Alison might be manipulative and shrewd, but a section of fans have made a strong case on why she might not be the one behind Mona's murder. In fact, fan theories suggest Paige might be the one to blame for Mona's death.

It is a stretch, but Paige's insistence on leaving town when everything was going so well with her relationship with Emily has raised concerns. A number of fans believe Paige left town fearing her connection to Mona's murder might be revealed.

Here are two reasons why Paige is a prime suspect:

* The midseason finale saw Mona being dumped in the trunk of a blue car. Besides Mona herself, the other person who has a blue car on the show is Paige.

* Another theory has it that Lucas is somehow aware of Paige's involvement in Mona's death. "When they announced that Mona was murdered Lucas looked so hurt and upset. However, he looked at Paige, not once but twice. The expression on his face almost looked like he knew something, or at least suspected something. He almost looked angry," a tumblr post read.

It is not immediately known if Paige is indeed A, but showrunner Marlene King revealed that fans of "Pretty Little Liars" will soon be able to identify the evasive "A" as the show heads for its finale.

"By the end of this season I am sure some people will guess correctly and for the right reasons," King tweeted last week about the possibility of fans picking up clues as to who "A" is.

However, the show will reveal the identity of the hooded figure only by the end of season 6.

The next episode is titled "Over a Barrel," and it will see Emily struggling to come to terms over the state of her relationship with Paige, who has moved away to California. The episode synopsis reads: "Secrets are hard to keep, especially when you are keeping them from a loved one. Spencer searches for Mona's missing laptop with Caleb's help but where the search leads them could cross the "Toby approved" line." Aria will try to come clean to Ezra about the lie, but she "gets diverted by a possible goose chase."

"Pretty Little Liars" airs Tuesdays on ABC Family.