Maya was killed by a passerby character. A stalker pretending to be her cousin after her death to get close to Emily. The biggest shame was she wasn't even killed by a member of the A team. Meaningless.
Alison: It's like you went to sleep one night and forgot who I am. Aria: I know exactly who you are. A. Alison: Stop saying that. Aria: Why should I? You're A! You stole the game from Mona and then you killed her because she had proof.