Aria is a filly who has no friends and never talks to anybody. She's abused at home by her father, and her mother died while giving birth. Often aria gets blamed for it. To make matters worse, she is bullied by her fellow classmates at school. Her teachers make snotty remarks about her grades. One day, she overhears a remark from a filly which pushes her over the edge. Once out of school, she quickly makes her move and runs with nothing but a full backpack.
(And despite the image,she's a unicorn filly .)

November is the most hectic month for all the ponies, even the lazy blue pegasus. So they decide to have a late thanksgiving dinner in December.
Except they don't invite Pinkie pie. But theres no was she's gonna find out? Right?
(cover art belongs to its respectful owner.)
Note: I won't continue the story, although you can make up the ending.

One morning, Twilight discovers Fluttershys mother was strangled. by a scarf. Everypony thinks that Fluttershy is responsible, but Twilight knows better. She knows Fluttershy would never kill a fly - theres no way she'd kill a pony.
She'll do anything to prove the mare inoccent.
But little does she know the killer has been stalking her all along...