After the revealing Pretty Little Liars Halloween episode (Season 3, Episode 13: “This Is a Dark Ride”), some fans have changed their original theories about who really killed Alison (Sasha Pieterse), one of the biggest (if not the biggest) mystery on the show.

Now we know that Byron (Chad Lowe), of all people, was having an intense conversation with Alison in her backyard just before she was buried alive. Are we supposed to conclude that Byron had something to do with her first murder attempt? The one that left her reaching her hand out from that pile of dirt?

But we can’t forget about the people who were crowded into Alison’s bedroom that night, looking for her. Garrett (Yani Gellman) and Jenna (Tammin Sursok) had a confrontation with Alison in her backyard that same night, right before Byron. Jenna thinks that Garrett killed her, but he claims he didn’t (and we kinda believe him).

Melissa (Torrey DeVitto) and Ian (Ryan Merriman) were also desperate to find her that night, and we know they were after her because of the NAT club’s tapes. Is Melissa one of the more likely suspects now?

Vote in the poll below to tell us who you think killed Alison!

Catch the return of PLL Season 3 on Tuesday, January 8, 2013 at 8 p.m. ET/PT on ABC Family.

Molly Friedman is an editor at Wetpaint Entertainment. Follow her on Twitter @MollyFriedman.

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