"A" Theories
I think that Toby is "A" because someone locked Spencer in that room with a crobar when they were at the fair and i think he is because as soon as she got out he was straight outside
Facts
Alison has a twin
Mona had Alis diary
"A" (Mona) took spencer to the cliff when she wanted to throw her off
Ali is the sencond "A"
Mona used to rendez-vous amoureux, date Noel
Noel broke up with Mona to be with Jenna
Maya and Ali both died
Ali made up a fake twin so she could spy on the pretty little liars

Hope toi enjoyed the facts and my A theorie, I hoped i helped toi <3