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.
The alison that died wasnt the real one she was the crazy twin sister "courtney", and the real alison killed her. The real Alison is still alive!Ali killed AliThat's what a medium told Aria, this is actually true.Ali had a twin sister, Courtney. She pretended to be Alison, so Ali had to go to a mental hospital. After she could visit home, she killed Courtney, who was still pretending to be Alison.
In the 7th book, Heartless, it is suggested that Billy Ford killed Ali. In the 8th book of the series, Wanted, the truth is revealed (in somewhat retroactive continuity).Ali secretly had a twin sister, Courtney, who the girls knew as "Ali" until she was killed, actually by her sister the real Ali. Courtney was pretending to be Ali while Ali was in a mental hospital overseas. When Ali came back, she was so mad at Courtney for pretending to be her that she pushed Courtney into a hole, killing her. Aria, Emily, Spencer and Hanna didn't know about Ali's twin, so they were led to believe that the real Ali died.Mona was originally "A" because she was jealous that Hanna dumped her for Aria, Emily, and Spencer. Mona was "A" for awhile until she was killed at Homecoming. After Mona died, Ali took on the "A" persona.It wasnt Ali that died. It was Courtney.Well, in the books, Ali had a twin sister Courtney who switched places with Ali, then Courtney became friends with the 4 girls. Ali was mad at Courtney because of the switch so ali killed Courtney that night. and the REAL Ali was alive and courteny was killed.First of all Ali was really Chelsea, Allisons Twin sister. They switched places because Chelsea wanted a normal life ( was in a crazy house). So to make the long story short, Ali Killed "Ali"Read it in Wanted, The Last Book
The killer? The killer is Alison. Alison had a twin sister Courtney . Courtney was supposed to go to a mental institution but Alison went instead for some reason. Courtney befriended the girls. Then alison came back andkilled Courtney. The police found courtneys body. But don't get the wrong idea- Alison is NOT -A.
it was Mona, but after she dies, a new A comes back. The new A is actually ALI. ali has a twin sister, Courtney. and she was the one that was killed. And it was actually Courtney that was friends with Spencer, Hannah, Emily, and aria. Courtney lived in a mental institute but tricked ali into going. so ali got revenge & killed her, pushing her down the hole. so ali became A to get back at the pretty little liars.
The real Ali killed her twin Courtney. Courtney was friends with the Pretty Little Liars. Ali didn't like Courtney.
Ali was killed by the real Ali. Courtney was the Ali that was killed! Courtney and Ali were twins that switched place.
Ali isn't dead. The whole time it was Courtney pretending to be Ali. Courtney is sick in the head and somehow managed to switch places with Ali, then Ali came back and killed Courtney :)
Ali killed Courtney
Ali, her twin sister, killed Courtney.
Ali killed her sister because she was pretending to be her, so she pushed her into a hole and the next morning the workers filled up the hole and she was gone. So ALI disappears and at the end of book 8 it is not known whether she is alive or not. Anyway, to sum it up Ali killed her sister Courtney because Courtney was pretending to be Ali in the beginning of the summer where Courtney was Ali and Ali had to go and pretend to be Courtney in a mental hospital.
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.
Ali didn't kill her
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.
No one, she isn't dead. Ali had a twin sister named Courtney, and Courtney wanted to be her. So when Courtney was being transferred to another mental facility, she switched places and Ali's parents sent Ali to the facility by mistake. She tried telling her that she was Alison, but she didn't buy it because Courtney pretends to be Ali. So the Ali that the four girls knew was Courtney. So that night when Spencer gets into a fight with Ali(Courtney) Courtney gets killed. Ali killed Courtney out of revenge for ruining her perfect life. Thus Ali killed Ali.
The real ali, aka courtney, killed Jenna as well as the real courtney,the girl whom everyone knew as "Ali". (referred to in the books as "their Ali"
Ali was put into the mental ward instead of Courtney because somehow they got switched. So that is why Ali killed her sister. Revenge.