Wait, Could Pretty Little Liars' New Big Bad Be Alison または Ezra?! 

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fans have met a whole new Ezra (Ian Harding) this season—a  very angry, possibly alcoholic man who scarily lashed out at the Liars at the end of last week\'s episode when they accused him of murder. But could Ezra really be Charlotte\'s killer?

In our exclusive sneak peek at Tuesday\'s episode, "New Guy, New Lies," Aria (Lucy Hale), Emily (Shay Mitchell), Spencer (Troian Bellisario) and Hanna (Ashley Benson) discuss the possibility of TV\'s hottest former teacher getting his murder on. Plus, they dish on who their new "cyber-stalker" could be, even worrying that it could possibly be...Alison (Sasha Pieterse)?!

Also in the exclusive video above, we see new police detective Lorenzo (Travis Winfrey) holding a press conference about the murder investigation. "Without going into detail that could harm the investigation, I can tell you that we are narrowing down our list of suspects," he assures. "We are confident we know what the murder weapon was and we will find it. The person who killed Charlotte DiLaurentis will be brought to justice." 

So when will fans find out who murdered Charlotte? 

When we caught up with Shay Mitchell, she revealed, "I think that by the end of this season...you will find out." Of course, we can expect a lot of curveballs in the investigation, as showrunner Marlene King told us the new mystery would be "twist-turvy."

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