I'm a little bit confused after the last episode, so correct me if I'm wrong, but:
Hester tells the Ghost story about the murderer in the back of the car.
The exact same thing happens to Chanel #5.
Doesn't that mean the Red Devil has to be someone who heard that story?
Chanel Oberlin, Chanel #3, Chanel #5, Hester and Denise heard it.
Hester is dead, Denise is too old, #5 is unlikely unless it was an act with Boone in the costume.
So: Chanel #1 or Chanel #3 is the killer?