Because Courtney dumped Naomi(Ali's BFF) and made "friends" with Aria, Hanna,Emily, and Spencer. Also because Courtney stole Ali's identity and sent Ali off to a mental instute where Courtney was supposed to go.
She doesn't
Because Courtney was taking over Ali's life.
Ali didn't kill her
Because her sister, Courtney, ruined her life. Courtney pretended to be Ali so who the girls thought was Ali the whole time they were friends was really Courtney. Because they were twins their parents thought Ali was Courtney and sent Ali to the mental hospital instead of Courtney. Ali escaped and killed her sister for revenge.
No... Ali killed Ali. See the 'Alison' that died was really Courtney, Ali's twin sister. No Courtney was killed by Alison because Courtney stole Alison's straightners... i mean Life.
No. No one did. Her twin sister Courtney got killed because Courtney was pretending to be Ali. After Alison (Courtney) got in an argument with Spencer Alison got her revenge of killing Courtney.
In a barn fire
yes she, she killed her because when ali went to visit Courtney they switch, Courtney was supposed to switch back but never did so ali broke out of the institute and asked to change back she refused so she killed her.
The first A was Mona The second A was Ali. Ali had a twin sister named Courtney. Courtney took over her life and Ali took hers. Courtney was mentaly ill so Ali ended up going to a mental hospital. Ali wanted revenge on the PLL and Courtney so she murdered Courtney and became A as payback for becoming friends with Courtney. Ali and Courtney were both insane. Ali tries to kill the four PLL but almost dies trying to. But Sarah Shepard is making it sound like Ali is still alive and wants revenge.
Mona did not kill Ali. Spencer killed Mona because Mona was trying to kill her. The real Ali came to Rosewood and killed Courtney, her twin, because Courtney the crazy one stole Ali's life. The real Ali also killed Jenna, and framed Billy Ford, the Gazebo worker for both Ali and Jenna's murder.
Neither. The truth (spoiler alert!) Ali had a twin named Courtney. Courtney was crazy so they sent her to a mental ward. One day Courtney switched with Ali and Ali was sent to the ward instead. Ali killed Courtney in revenge. Read the rest....
yes of corse he did duh dintet you see the the viedo she was trying to kill him before he killled her.hope this helps :) :) No. He did not. It's very confusing. Alison has a twin sister who is crazy in the head named Courtney. Courtney took Ali's perfect life and for Ali to get back ali killed Courtney. The Pretty Little Liars never knew about Courtney so they thought Ali died but really, Courtney died. Confusing right?