This installment of teens' inhumanity to teens is authored by a high school teacher, which means she's probably observed the horrible behavior for herself. Scary!
Alice Franklin is branded the school slut and a murderer and has to navigate the hostile waters of the place once she's gone from lower-level popularity to pariah status.
The story is told in four voices, before Alice's finally makes an appearance at the end:
former best friend Kelsie
belle of the ball Elaine
best friend of the deceased Josh
brilliant nerd Kurt
I discovered Jennifer Mathieu because I cataloged a zine of hers from bitd, Jennifer, probably written ten or more years ago. There are at least three other zinesters-turned-YA-authors that I can think of: