We now know that Melissa Hastings (Torrey DeVitto) was the one to accidentally kill Bethany Young on Pretty Little Liars. Spencer's (Troian Bellisario) big sister buried the girl alive because she a) thought she was already dead and b) thought Spencer was responsible. But, who was actually responsible for knocking Bethany out and leaving her for Melissa to find? We speculate below…

Alison DiLaurentis. Bethany was wearing the exact same outfit as Alison (Sasha Pieterse) that night and was instrumental in Ali successfully faking her death. Ali claims that she, too, was hit over the head that night, but can we really believe her? Was this just another one of her elaborate schemes? Was she the one who knocked Bethany out and left her to die?

Mona Vanderwaal. Mona (Janel Parrish) was another person involved in the faked death of Alison DiLaurentis, and who, therefore, had use for an Ali look-alike. Was Mona already hatching the scheme that would get Ali out of town before she came along a scared Ali walking along the side of the road after having been almost buried alive herself?


Melissa Hastings. Sure, Melissa claims that she buried Bethany alive because she thought Spencer was the one who had previously attacked her, but is she telling the truth? Perhaps Melissa is only trying to save her own skin. She suspects the police will figure out it was her eventually, and she is painting a picture of manslaughter vs. murder. This would also explain why she was stupid enough to record her confession on video. Maybe she and Mr. Hastings even came up with this plan together.

Jason DiLaurentis. Right now, the show is implying that Ali’s experience of getting buried alive and Bethany’s experience of getting buried alive happened back-to-back, but doesn’t it make more sense if they were actually the same experience? What if Alison is Bethany, aka Ali’s twin, and what she remembers of her mother burying her alive is the actual truth? The Rosewood P.D. have been duped on body identification before. If this is the case, then Jason (Drew Van Acker) could have been the one who took out Bethany. Then, Mrs. D. and Melissa both covered for him.

Spencer Hastings. Spencer believes that she didn’t hurt anyone that night because Ali reassures her that she sent her back to the sleepover, but is that the truth? Can we really believe Alison in this matter? Spencer can’t remember anything and she was walking around angry at Ali and with a shovel that night. We don’t want to believe that Spencer could be responsible for something like this, but we can’t rule it out, either.

Who do you think attacked Bethany Young? Share your theories in the comments below!

Catch the next episode of Pretty Little Liars on August 26, 2014 at 8 p.m. ET on ABC.

Kayti Burt is a contributing writer for Wetpaint Entertainment with a penchant for all things pop culture. Follow her on Twitter and Google+!