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The concept of who killed Alison DiLaurentis changes throughout the entire Pretty Little Liars series. Many people who have been accused with this task are Toby Cavanaugh, Spencer Hastings, Emily Fields, Aria Montgomery, Hannah Marin, Mrs. Hastings (Spencer's mother), Ian, Melissa Hastings, Billy and Jenna. Alison was not actually killed, her twin sister Courtney was. Read all of the Pretty Little Liars series and this answer will make much more sense!

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15y ago

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