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This is kind of complicated but Courtney was killed by Alison.. Alison was sent off to a mental hospital mistaken to be her sister Courtney. Alison was so filled with rage that she went back to Rosewood and when Courtney stepped out of the barn during the sleepover that night Alison killed her and threw her body in a hole in the ground..which later the gazebo was built over. So really, the whole time Aria, Hanna, Emily,and Spencer had never been bestfriends with the real Ali they knew to be missing but her mentally challenged sister, Courtney.

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14y ago

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