Well, Ali and her twin sister Courtney got mixed up one day and her sister was about to get taken to a mental hospital but saw the four main girl hanna aria Emily and Spencer standing outside. So she went outside and pretended to be Ali and Ali was stuck with her sisters life because of course her mother gotthem mixed up and took the real Ali instead of Courtney to the mental hospital. Then Ali came home from the mental hospital for a weekend and killed her sister. That was that then framed it on others. But the worst part was that the girls really did see Ali but not the Ali they knew. Does that answer your question? Oh and i don't know if its the same in the show. and also remember she frames sevral people before she really tells the girls she is -A.
kisses,
Sincerly - A
Ian kills Allison.
Ali (the real Ali) kills Courtney.
We don't even know who A is yet.
Ali kills Ali
He lives to the end when Alison kills him
Alison Dilaurentis
Yes she does.. she pretty mich kills herself
No
the army comes in and kills everyone
Actually no...
Ian, who is Spencer's sister Mellisa's husband, kills her.
He commits suicide because he feels bad for what he did to Jenna (his step sister)