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After Alison (Really it's Courtney) has that fight with Spencer outside the barn where Spencer hits Courtney, Courtney runs and Spencer just remembers seeing her arguing with someone blond.
That's because it's Courtney fighting with Alison. Alison and Courtney fight and it's not specified how she actually killed Courtney but she throws Courtney in the hole behind the barn, the one the next day the workers fill so no one realizes Courtney is in it...
After that, Alison and Courney's parents take Alison away thinking she's Courtney... she doesn't come back till the last book and nobody knows she's the real Alison...
What else can I help you with?
Who is Courtney on Pretty Little Liars?
Courtney is alison's twin sister, who pretended to be her
How did Alison kill Courtney in Pretty Little Liars?
Suffication
Who was involved in killing Courtney in Pretty Little Liars?
Alison
How did Alison kill Courtney on Pretty Little Liars?
by hands
Does Alison on Pretty Little Liars have a sister named Courtney?
Yes
Why does Courtney want to be like Alison on Pretty Little Liars?
Courtney wants to pretend to be Alison meanwhile Courtney was supposed to be in a mental hospital
Did Alison have a sister in Pretty Little Liars?
Yes. Alison had a twin sister named Courtney.
How was Courtney crazy in Pretty Little Liars?
she tried to be alison and she was in a mental ward
Does Jenna know about Alison killing Courtney in Pretty Little Liars?
yes
Does Alison on Pretty Little Liars have a twin sister named Courtney?
Yes
What did Courtney steal from Alison in Pretty Little Liars?
Courtney stole Ali's ring :) hope it helps
Why is Alison A in Pretty Little Liars?
Because the Pretty Little Liars weren't actually her friends. Courtney, (Alison's twin sister) made friends with them. Alison had nothing to do with them. So she's mad and tries to kill them.
