Mona's Kidnapper

Mona's murderer is an anonymous character that we possibly know. The character has blonde hair that may or may not be a wig and appears to be brutal as the Vanderwaal household is in shambles and blood stains are left all over the place. The hair changes between scenes may be a clue that there were at least two people breaking into Mona's house.

Possible Identities

 * Alison DiLaurentis
 * CeCe Drake
 * Meredith Sorenson
 * Mike Montgomery
 * Sydney Driscoll
 * Paige McCullers
 * The Black Widow / A
 * Cindy
 * Mindy
 * Someone's Twin

Eliminated Identities
'''Unless we actually see Melissa in London than she can't be accounted for. We assumed CeCe was in France and she wasn't.'''
 * Hanna Marin
 * Aria Montgomery
 * Ezra Fitz
 * Caleb Rivers
 * Emily Fields
 * Lucas Gottesman
 * Spencer Hastings
 * Leona Vanderwaal
 * Toby Cavanaugh
 * Gabriel Holbrook

The Murder
In Taking This One to the Grave we see someone with a blonde wig that looks like Alison's hair breaking into Mona's house, going up the stairs. After that, we see another anonymous person, but with a straight blonde wig going into her room and Mona sees Him or Her.

In Through a Glass, Darkly a hidden camera is found showing a part of the fight between Mona and the same anonymous attacker who got into her room. She or He appears to push her down the stairs, jump down and try to kill her. The murderer put Mona's body in a trunk. Spencer mentions in Through a Glass, Darkly that there were traces of Mona's DNA in Alison's trunk and Carla Grunwald says she feel Mona is surrounded by earth, insects and cold and is not having an easy passing. In this episode, Alison is being arrested and put in jail for Mona's murder, the girls are not so sure that Alison killed Mona after A keeps terrorizing them while Ali is in jail.