In a barn fire
Suffication
by hands
Because Courtney was taking over Ali's life.
NO! Alison killed Courtney in the books. Melissa and Ian did not.
Spencer is not the murderer; Ali is the murderer.
No, her twin sister Ali did.
She was obsessed with being ali and tried to kill her.
She doesent ail kill Courtney for putting her in a mental hospital
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.
Ian isn't A, Courtney who is Alison's twin was murdered by Alison ..Mona is -A but after Mona dies and tries to kill Spencer ; Ali becomes -A to mess with the Pretty Little Liars.
alis mom told the world about alps twin courtney.and turns out courtney was the REAL ALI.ali killed courtney so ali changes the story around when she told the pretty little liars that she's the real ali.but then she tricks them again and tries to kill them and admits that she killed jenna courtney and ian and trie to kill them too and also tried to kill melissa.
Allison didn't kill her friends in Pretty Little Liars