In the books, Ali had a twin sister. The dead body the police found was her twin sister. Ali killed her sister and Ian.
Ian kills Allison.
Ali kills Ali
I believe it was the third book, and if not it is might be two, but he kills himself.
Ali (the real Ali) kills Courtney.
We don't even know who A is yet.
He lives to the end when Alison kills him
Alison Dilaurentis
the army comes in and kills everyone
Yes she does.. she pretty mich kills herself
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)
In a hole that the construction worker had dug